CN104602118A - Multimedia data output method and equipment - Google Patents

Abstract

The invention discloses a multimedia data output method and device. In multi-screen interactive services, the existing set-top box equipment is optimized. The set-top box does not directly transmit the multimedia data sent by one display device to other display devices, but According to the display capability information of other display devices, the multimedia data is cached into multimedia data of different display states (such as: the original high-resolution multimedia data is cached into low-resolution multimedia data), and the set-top box according to the buffered multimedia data. The display state is transmitted to the display device adapted to display capability information, so that display devices with different display capabilities can correctly display the received multimedia data after receiving the multimedia data transmitted by the set-top box.

Description

A kind of multimedia data output method and device

technical field

The invention relates to the field of computer technology, in particular to a multimedia data output method and device.

Background technique

The Internet TV set-top box is a commonly used entertainment device in the home. An Internet TV set-top box can be connected to multiple display devices. It can also be connected to display devices such as projectors or projectors, and can also be connected to display devices such as mobile phones and tablet computers with WiFi functions through wireless methods (such as a set-top box as a WiFi access point).

The multi-screen interactive function between multiple display devices connected to the same set-top box has gradually become mainstream. Take the situation where the set-top box is connected to a TV through HDMI and a mobile phone through WiFi as an example. The stored multimedia data is displayed on the mobile phone. The specific method is as follows:

First, the television transmits multimedia data to the set-top box through the HDMI interface.

Then, the set-top box transmits the multimedia data to the mobile phone connected through WiFi according to the instruction of the user. Specifically, the set-top box can transmit the multimedia data to the mobile phone according to a certain wireless multimedia transmission protocol.

Finally, the mobile phone displays the received multimedia data, realizing the multi-screen interaction between the TV and the mobile phone.

However, in the actual multi-screen interactive service, the display capabilities of multiple display devices connected to the same set-top box are different. For example, the resolution of the multimedia data that can be displayed is different. The current multi-screen interactive service may have the capability of some display devices. Not supported, resulting in problems that cannot be displayed correctly.

Contents of the invention

Embodiments of the present invention provide a method and device for outputting multimedia data, which are used to solve the problem in the prior art that multi-screen interactive services cannot be displayed correctly due to lack of support by display devices.

An embodiment of the present invention provides a method for outputting multimedia data, the method comprising:

The set-top box receives the multimedia data sent by the first display device;

The set-top box adjusts the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device according to the display capability information of the second display device to receive the multimedia data, and stores it;

The set-top box sends the stored multimedia data to the second display device.

Through the solution of the embodiment of the present invention, the set-top box generates adapted multimedia data for display devices with different display capabilities, so that the display devices with different display capabilities can correctly display the received multimedia data after receiving the multimedia data transmitted by the set-top box, In order to correctly realize the multi-screen interactive business.

Preferably, the set-top box adjusts the multimedia data sent by the first display device into multimedia data whose display state is adapted to the display capability information of the second display device in the following manner, and stores:

The set-top box determines the buffer size required after the adjustment of the display state of the multimedia data sent by the first display device according to the display capability information of the second display device;

The set-top box adjusts the display state of the multimedia data sent by the first display device according to the display capability information of the second display device, so that the adjusted display state of the multimedia data is adapted to the display capability information of the second display device;

The set-top box stores the adjusted multimedia data in the buffer, and establishes a mapping relationship between the start address of the buffer in the memory space and the second display device;

The set-top box sends the stored multimedia data to the second display device, specifically including:

The set-top box reads the multimedia data from the buffer and sends it to the second display device according to the start address of the buffer in the memory space.

Through the scheme of the embodiment of the present invention, the set-top box uses frame buffering to generate and cache multimedia data adapted to the display capability of the second display device, which can be applied to the existing Android system to modify the hardware of the set-top box and the display device Small and easy to implement.

Preferably, the set-top box determines the display capability information of the second display device in the following manner:

When the set-top box is connected to the second display device, it determines the display capability information of the second display device from the device descriptor reported by the second display device.

Through the solution of the embodiment of the present invention, the device descriptor of the display device is reported to the set-top box during the connection process, so as to ensure that the set-top box can obtain the device descriptor of the display device when performing multi-screen interaction.

Preferably, the device descriptor is carried in an extension field of the multimedia message.

Through the solution of the embodiment of the present invention, the structure of the multimedia message is extended to carry the device descriptor, and the purpose of transmitting the device descriptor can be achieved with minor changes to the existing transmission mechanism.

Preferably, the display capability information includes at least one of the following information:

The resolution of the display device, the bit rate of the display device, and the parameters of each pixel of the display device.

The embodiment of the present invention also provides a kind of output device of multimedia data, and described device comprises:

A data receiving module, configured to receive multimedia data sent by the first display device;

A processing module, configured to adjust the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device according to the display capability information of the second display device to receive the multimedia data;

The storage module is used for storing the multimedia data adjusted by the processing module;

The data sending module is used to send the multimedia data stored in the storage module to the second display device.

Through the solution of the embodiment of the present invention, the set-top box generates adapted multimedia data for display devices with different display capabilities, so that the display devices with different display capabilities can correctly display the received multimedia data after receiving the multimedia data transmitted by the set-top box, In order to correctly realize the multi-screen interactive business.

Preferably, the processing module is specifically configured to determine, according to the display capability information of the second display device, the buffer size required after adjustment of the display state of the multimedia data sent by the first display device, and according to the display capability information of the second display device The display capability information of the first display device is used to adjust the display state of the multimedia data sent by the first display device, so that the adjusted display state of the multimedia data is adapted to the display capability information of the second display device;

The storage module is specifically configured to store the multimedia data adjusted by the processing module in the buffer, and establish a mapping relationship between the start address of the buffer in the memory space and the second display device;

The data sending module is specifically configured to read the multimedia data from the buffer and transmit it to the second display device according to the start address of the buffer in the memory space.

Through the scheme of the embodiment of the present invention, the set-top box uses frame buffering to generate and cache multimedia data adapted to the display capability of the second display device, which can be applied to the existing Android system to modify the hardware of the set-top box and the display device Small and easy to implement.

Preferably, the processing module is further configured to determine display capability information of the second display device from a device descriptor reported by the second display device when connected to the second display device.

Through the solution of the embodiment of the present invention, the device descriptor of the display device is reported to the set-top box during the connection process, so as to ensure that the set-top box can obtain the device descriptor of the display device when performing multi-screen interaction.

Preferably, the device descriptor is carried in an extension field of the multimedia message.

Through the solution of the embodiment of the present invention, the structure of the multimedia message is extended to carry the device descriptor, and the purpose of transmitting the device descriptor can be achieved with minor changes to the existing transmission mechanism.

Preferably, the display capability information includes at least one of the following information:

The resolution of the display device, the bit rate of the display device, and the parameters of each pixel of the display device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a network architecture applied in an embodiment of the present invention;

2 is a schematic diagram of the steps of the output method of multimedia data in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the steps of a method for outputting multimedia data in Embodiment 1 of the present invention;

4 is a schematic diagram of a message format of a multimedia protocol message in Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a message format of a multimedia message in Embodiment 1 of the present invention;

FIG. 6 is a schematic structural diagram of an output device for multimedia data in Embodiment 3 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to enable multiple display devices with different display capabilities connected to the same set-top box to display multimedia data provided by other display devices in the multi-screen interactive service, the embodiment of the present invention optimizes the existing set-top box device. After displaying the multimedia data reported by the device, it does not directly transmit the multimedia data to other display devices, but caches the multimedia data into multimedia data in different display states according to the display capability information of other display devices (for example, the original high high-resolution multimedia data into low-resolution multimedia data), the set-top box transmits the buffered multimedia data to the display device adapted to the display capability information according to the display status of each cached multimedia data, so that display devices with different display capabilities receive the set-top box After transmitting the multimedia data, the received multimedia data can be displayed correctly.

As shown in Figure 1, it is the network architecture applied by the solution of the embodiment of the present invention. As can be seen from Figure 1, the set-top box can be connected to multiple portable display devices through wireless communication methods such as WiFi (such as using the underlying hardware method or Install the application software that supports the wireless multimedia transmission protocol), and connect to multiple non-portable display devices through HDMI and other wired methods. At the same time, the set-top box also has an IR port, which can receive the trigger of the IR remote control.

The portable display device can be any mobile electronic device, such as: portable media player, portable game system, smart phone, tablet computer, etc. The non-portable display device may be a television, a computer monitor, a projector, and the like.

The present invention will be described in detail below in conjunction with specific examples, but the present invention is not limited to the following examples.

Embodiment one:

As shown in Figure 2, it is a schematic diagram of the steps of the output method of multimedia data in Embodiment 1 of the present invention, and the method includes:

Step 101: The STB receives multimedia data sent by the first display device.

If the first display device is connected to the set-top box in a wireless manner, then in step 101, the first display device may send multimedia data to the set-top box through a wireless multimedia protocol message (such as a UDP message). If the first display device is connected to the set-top box through HDMI, the first display device can directly send multimedia data to the set-top box through the HDMI interface

The multimedia data may be video data, or other types of multimedia data.

Step 102: According to the display capability information of the second display device to receive the multimedia data, the set-top box adjusts the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device, and storage.

In the solution of this embodiment, when the display device is connected to the set-top box, the display device will report its own device descriptor to the set-top box, and the device descriptor includes the display capability information of the display device, such as: the resolution of the display device, The bit rate of the display device, the parameters of each pixel of the display device and other characteristic parameters of the display device, the parameters of each pixel of the display device include but not limited to the offset of the pixel and the like.

The display state involved in this step 102 is used to reflect parameters of multimedia data, such as resolution of video data and the like.

A preferred implementation of this step 102 is: the set-top box stores the received multimedia data as multimedia data in different display states through frame buffer (Framebuffer), such as: storing high-resolution video data as low-resolution video data.

The principle of the frame buffer is to abstract the buffer actually used for storing multimedia data, shield the underlying hardware capability of the set-top box, and allow the upper layer application to directly read and write the buffer in the graphics mode. The specific method is as follows:

First, the set-top box determines the buffer size required after the display state adjustment of the multimedia data sent by the first display device according to the display capability information of the second display device.

For example: the set-top box can read the device descriptor of the second display device, and obtain the current display capability information of the second display device, such as: the resolution of the second display device, the pixel parameters, etc. The display capability information of the device and the size of the multimedia data received from the first display device determine the buffer size required by the multimedia data adapted to the second display device.

Then, the set-top box stores the multimedia data whose display state is adapted to the display capability information of the second display device into the buffer, and matches the start address of the buffer in the memory space with the second display device Create a mapping relationship.

The set-top box can establish a mapping relationship between the buffer mapping and the second display device through a system call. If the call is successful, the return value of the call is the starting address of the buffer in the disk file that has established a mapping relationship with the second display device in the memory space. .

Finally, the set-top box can perform read/write operations on the multimedia data in the buffer, and after transmitting the multimedia data to the second display device, the mapping relationship and the space of the buffer can be released through a system call.

The above is how the set-top box generates multimedia data adapted to the display capability information of the second display device according to the display capability information of a second display device. If the multimedia data reported by the first display device to the set-top box needs to be displayed on other multiple display devices output (that is, there are multiple second display devices), the set-top box can execute the solution of step 102 for each second display device, specifically, the set-top box can store the respectively adapted Multimedia data can also generate adapted multimedia data for a second display device each time and transmit it to the second display device, release the corresponding mapping relationship and buffer space, and then generate for other second display devices Multimedia data for video.

Step 103: the STB sends the stored multimedia data to the second display device.

In this step 103, the display state of the multimedia data received by the second display device is adapted to its own display capability information, therefore, the received multimedia data can be displayed correctly, and multi-screen services can be truly realized.

Embodiment two:

Embodiment 2 of the present invention describes the scheme of Embodiment 1 of the present invention in detail through a specific example.

Assumption: a smart phone and a tablet computer are respectively connected to the set-top box, and the video data sent by the tablet computer to the set-top box is expected to be displayed on the smart phone, as shown in Figure 3, the output method of multimedia data mainly includes the following three processes:

The first process: the process of establishing a wireless connection between a smartphone and a tablet computer and a set-top box. The following takes the establishment of a wireless connection between a smartphone and a set-top box as an example. The process of establishing a connection between a tablet computer and a set-top box is the same and will not be repeated.

Step 201: The smartphone broadcasts a discovery request (discovery_Request) message.

Step 202: After receiving the discovery_Request message, the set-top box returns a discovery response (discovery_Response) message, which carries the IP address of the set-top box.

Step 203: The STB broadcasts a discovery_Request message.

Step 204: After receiving the discovery_Request message broadcast by the set-top box, the smartphone sends a discovery_Response message to the set-top box. At this time, the tablet computer can also perform the same process as the smartphone.

Step 205: According to the received discovery_Response message, the set-top box determines that there are two display devices, a smart phone and a tablet computer, that require a wireless connection, assuming that the set-top box agrees to establish a wireless connection with the smart phone, and sends a device connection request to the smart phone (Device_Connecting_Request) message.

Step 206: the smartphone sends a connection response (Device_Connecting_Response) message to the STB.

Step 207: The set-top box sends a capability query (Capability_Request) message to the smart phone, requesting to obtain display capability information of the smart phone.

Step 208: the smartphone returns a Capability Response (Capability_Response) message to the STB, and carries the device descriptor therein.

The device descriptor can be carried in the multimedia message, and sent to the set-top box by the smart phone, as shown in Figure 4, which is the message format of the multimedia protocol message, wherein:

The destination address (Destination Addresss) is 6 bytes, which is used to indicate the MAC address of the receiver.

The source address (Source Address) is 6 bytes, which is used to indicate the MAC address of the sender.

The Ethernet type (Ether Type) is 2 bytes, which is the standard IP (0x0800).

The UDP destination port is 2 bytes, and the UDP destination port is set to 48689.

The specific format of the multimedia message (MultimediaMessage) is shown in Figure 5. The embodiment of the present invention adds a field (Device Info) for representing the device descriptor on the basis of the conventional multimedia message. For example, the content of the device descriptor is resolution and bit rate, you can add 2 bytes on the basis of the regular multimedia message, which is used to represent the resolution code (DPI Code) and bit rate code (Bit Rate Code) of the smartphone.

Step 209: the set-top box sends a connection request (Session_Connecting_Request) message to the smart phone, and carries the TCP and UDP port numbers of the set-top box in it.

Step 210: the smartphone returns a connection response (Session_Connecting_Response) message to the STB.

Through the above steps 201 to 210, the smart phone establishes a wireless connection with the set-top box, and the set-top box learns the device descriptor of the smart phone. The connection between the tablet and the set-top box is established in the same way. The above steps 201 to 210 are only a feasible solution for wireless connection between the smart phone and the set-top box. At present, all wireless connection methods in the prior art are applicable to the solution of the embodiment of the present invention.

The second process: the tablet computer sends video data to the set-top box.

Step 211: The tablet computer can select a piece of video data locally, and send the video data to the set-top box through the UDP port of the set-top box.

Step 212: The set-top box stores the received video data locally, and determines that the display device to which the video data is to be transmitted is the connected smart phone.

Step 213: The set-top box determines the resolution of the smart phone, and judges whether the resolution of the currently received video data matches the resolution of the smart phone; if so, directly transmits the video data sent by the tablet computer to the smart phone; otherwise, Adjust the resolution of the video data sent by the tablet computer so that the resolution of the adjusted video data is adapted to the resolution of the smart phone, and store the video data after the resolution adjustment in the buffer, if this step 213 adopts frame In the way of buffering, the set-top box uses a system call, and the return value of the call is the starting address of the buffer in the memory space that has established a mapping relationship with the smart phone in the disk file.

Assuming that the resolution of the video data sent by the tablet to the set-top box is 1024×768, while the resolution supported by the smartphone is 800×480, the set-top box can interpolate and sample the video data sent by the tablet to obtain Video data with a resolution of 800×480 (or video data with a resolution lower than 800×480) and stored. The adjustment process of the display state of the video data involved in the embodiment of the present invention can be regarded as the encoding and decoding process of the video data. The way of the purpose of the state.

This step 213 is described by taking the resolution as an example, and it is also applicable to other display capability information.

The third process: the set-top box sends the video data after resolution adjustment to the smart phone.

Step 214: The set-top box exchanges control plane data with the smart phone through TCP, so as to transmit video data.

Step 215: The set-top box transmits the video data after resolution adjustment to the smart phone.

If frame buffering is used in step 213, the set-top box reads the resolution-adapted video data generated for the smart phone through the starting address of the buffer in the memory space, and transmits the video data to the smart phone.

Embodiment three:

Embodiment 3 of the present invention describes a multimedia data output device under the same idea as Embodiment 1. As shown in FIG. 6, the device includes a data receiving module 11, a processing module 12, a storage module 13 and a data sending module 14, of which:

The data receiving module 11 is used for receiving the multimedia data sent by the first display device;

The processing module 12 is configured to adjust the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device according to the display capability information of the second display device to receive the multimedia data;

The storage module 13 is used for storing the multimedia data adjusted by the processing module;

The data sending module 14 is used for sending the multimedia data stored in the storage module to the second display device.

The data receiving module 11 and the data sending module 14 are not only used for transmitting multimedia data with the display device, but also used for sending and receiving related request messages and response messages when establishing a connection with the display device.

In addition to the function of optimizing the display state of multimedia data, the processing module 12 can also be used to determine the display capability information of the second display device from the device descriptor reported by the display device when connected to the display device.

The storage module 13 can create and manage a plurality of buffers. When using frame buffering, the initial address of each buffer in the memory space can be mapped to display devices with different display capabilities, so as to achieve different display The purpose of displaying state multimedia data on display devices with different display capabilities.

Further, the processing module 12 is specifically configured to determine, according to the display capability information of the second display device, the buffer size required after the display state adjustment of the multimedia data sent by the first display device, and according to the display capability information of the second display device The display capability information of the first display device is used to adjust the display state of the multimedia data sent by the first display device, so that the adjusted display state of the multimedia data is adapted to the display capability information of the second display device;

The storage module 13 is specifically configured to store the multimedia data adjusted by the processing module in the buffer, and establish a mapping relationship between the start address of the buffer in the memory space and the second display device;

The data sending module 14 is specifically configured to read the multimedia data from the buffer and transmit it to the second display device according to the start address of the buffer in the memory space.

It should be noted that the output device of the multimedia data can have a network device module 10 for cooperating with the data receiving module 11 and the data sending module 14 to establish a connection with a plurality of display devices; There may be multiple buffers 15 for storing the multimedia data specified by the storage module 13 .

The multimedia data output device involved in Embodiment 3 of the present invention may be a functional component integrated in a set-top box.

Through the solutions of Embodiment 1 to Embodiment 3 of the present invention, when multiple display devices are connected to the set-top box at the same time, the sharing of multimedia data can be realized. Even if the display capabilities of the display devices are different, the display state of the shared multimedia data can be adjusted through the set-top box, so that The display status of the multimedia data is adapted to the display capability of each display device, so that the display effect is better; and the solution of the embodiment of the present invention can be applied to the existing Android system, and the hardware changes of the set-top box and the display device are relatively small. Easy to implement.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

In a typical configuration, the computer device includes one or more processors (CPUs), input/output interfaces, network interfaces and memory. Memory may include non-permanent storage in computer-readable media, in the form of random access memory (RAM) and/or nonvolatile memory such as read-only memory (ROM) or flash RAM. Memory is an example of computer readable media. Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-persistent computer readable media (transitory media), such as modulated data signals and carrier waves.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. a kind of output method of multimedia data, it is characterized in that, described method comprises: The set-top box receives the multimedia data sent by the first display device; The set-top box adjusts the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device according to the display capability information of the second display device to receive the multimedia data, and stores it; The set-top box sends the stored multimedia data to the second display device. 2. The method according to claim 1, wherein the set-top box adjusts the multimedia data sent by the first display device into multimedia data whose display state is adapted to the display capability information of the second display device in the following manner, and storage: The set-top box determines the buffer size required after the adjustment of the display state of the multimedia data sent by the first display device according to the display capability information of the second display device; The set-top box adjusts the display state of the multimedia data sent by the first display device according to the display capability information of the second display device, so that the adjusted display state of the multimedia data is adapted to the display capability information of the second display device; The set-top box stores the adjusted multimedia data in the buffer, and establishes a mapping relationship between the start address of the buffer in the memory space and the second display device; The set-top box sends the stored multimedia data to the second display device, specifically including: The set-top box reads the multimedia data from the buffer and sends it to the second display device according to the start address of the buffer in the memory space. 3. The method according to claim 1, wherein the set-top box determines the display capability information of the second display device in the following manner: When the set-top box is connected to the second display device, it determines the display capability information of the second display device from the device descriptor reported by the second display device. 4. The method according to claim 3, wherein the device descriptor is carried in an extension field of the multimedia message. 5. The method according to any one of claims 1-4, wherein the display capability information includes at least one of the following information: The resolution of the display device, the bit rate of the display device, and the parameters of each pixel of the display device. 6. A kind of output equipment of multimedia data, it is characterized in that, described equipment comprises: A data receiving module, configured to receive multimedia data sent by the first display device; A processing module, configured to adjust the multimedia data sent by the first display device to multimedia data whose display state is adapted to the display capability information of the second display device according to the display capability information of the second display device to receive the multimedia data; The storage module is used for storing the multimedia data adjusted by the processing module; The data sending module is used to send the multimedia data stored in the storage module to the second display device. 7. The apparatus of claim 6, wherein The processing module is specifically configured to determine, according to the display capability information of the second display device, the buffer size required after the display state adjustment of the multimedia data sent by the first display device, and according to the display capability information of the second display device Information, adjusting the display state of the multimedia data sent by the first display device, so that the adjusted display state of the multimedia data is adapted to the display capability information of the second display device; The storage module is specifically configured to store the multimedia data adjusted by the processing module in the buffer, and establish a mapping relationship between the start address of the buffer in the memory space and the second display device; The data sending module is specifically configured to read the multimedia data from the buffer and transmit it to the second display device according to the start address of the buffer in the memory space. 8. The apparatus of claim 6, wherein The processing module is further configured to determine display capability information of the second display device from a device descriptor reported by the second display device when connected to the second display device. 9. The device according to claim 8, wherein the device descriptor is carried in an extension field of the multimedia message. 10. The device according to any one of claims 6-9, wherein the display capability information includes at least one of the following information: The resolution of the display device, the bit rate of the display device, and the parameters of each pixel of the display device.