CN104363467A - Front end digital television system - Google Patents
Front end digital television system Download PDFInfo
- Publication number
- CN104363467A CN104363467A CN201410595090.3A CN201410595090A CN104363467A CN 104363467 A CN104363467 A CN 104363467A CN 201410595090 A CN201410595090 A CN 201410595090A CN 104363467 A CN104363467 A CN 104363467A
- Authority
- CN
- China
- Prior art keywords
- asi
- distribution amplifier
- scrambler
- digital television
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a front end digital television system. The front end digital television system comprises a satellite receiver, an encoder, a plurality of ASI distribution amplifiers, a plurality of switches, a multiplexer, a scrambler, an adapter, a QAM modulator and a television set top box, wherein the satellite receiver and the encoder are both connected onto the first ASI distribution amplifier, the multiplexer, the first switch, the second ASI distribution amplifier, the scrambler, the second switch and the third ASI distribution amplifier are sequentially connected at the rear of the first ASI distribution amplifier, and furthermore the adapter and the QAM modulator are connected between the third ASI distribution amplifier and the television set top box. By adopting the theory, the front end digital television system can perform double backup on a core device, a unique device and a device which easily breaks down, data loss is avoided, and safe broadcasting of a front end of a digital television is guaranteed.
Description
Technical field
The present invention relates to digital TV field, be specifically related to front-end digital television system.
Background technology
Digital Television, the television system of digital signal or television equipment.Its concrete transmitting procedure is: the image sent by TV station and voice signal, after digital compression and digital modulation, form digital television signal, through mode transmission such as satellite, terrestrial wireless broadcast or wire cables, after Digital TV Receiving, restore original image and sound accompaniment by digital demodulation and digital video-audio decoding process.Because overall process all adopts digital technology process, therefore, the loss of signal is little, and reception is good.Along with the stable development of Digital Television Integral conversion, the safe broadcast of digital TV front-end also becomes and becomes more and more important, and digital system is more complicated, if the body only reparation of system being placed on high-level technical staff is obviously unscientific, how ensures nucleus equipment, Unique Device, easily send out the safety of faulty equipment information and seem particularly important.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide front-end digital television system, this system can carry out double copies to nucleus equipment, Unique Device, easily a faulty equipment, avoids loss of data, ensures the safe broadcast of digital TV front-end.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: front-end digital television system, comprise satellite receiver, encoder, multiple ASI distribution amplifier, multiple switch, multiplexer, scrambler, adapter, QAM modulation device and TV set-top box, described satellite receiver and encoder are all connected on an ASI distribution amplifier, also connection multiplexing device, the first switch, the 2nd ASI distribution amplifier, scrambler, the second switch and the 3rd ASI distribution amplifier successively at an ASI distribution amplifier rear; Payload attach fitting and QAM modulation device is gone back between the 3rd ASI distribution amplifier and TV set-top box.In this system, QAM modulation device possesses automatic backup function, to back up information in time, facilitates the later stage to carry out fast quick-recovery to information.Need to increase ASI switch in the input of QAM, export and increase radio frequency rf signal automatic switchover device.The parameter of encoder is comparatively simple, and repair time is shorter, takes n:1 automated back-up mode.Multiplexer and scrambler adopt dual-computer redundancy to automatically switch, and adapter adopts N:1 backup mode to carry out manual switchover.Switch is also set between multiplexer and scrambler to carry out effective transmission of data, and signal is amplified, thus the nucleus equipment of guarantee television headend, Unique Device, easily a faulty equipment all back up, facilitate the later stage to recover data fast, ensure the Safety output of digital TV front-end.In order to reduce the difficulty of front end troubleshooting, ensureing the video quality of program, determining, for the external code stream from satellite, SDH, to maintain original code flow structure as far as possible, do not carry out decoding and secondary coding, do not adjust code flow structure and the code check of MPEG2 aspect.Reduce system complexity, signal flow is clear, is conducive to carrying out Technical Coordination Work with the program provider of upstream, is conducive to distinguishing respective responsibility, is easy to system manager and analyzes and localizing faults, ensure the Safety output of digital TV front-end.
Described restorer comprises master reset device and standby restorer, and two restorers are all connected between an ASI distribution amplifier and the first switch.
Described scrambler comprises main scrambler and standby scrambler, and main scrambler and standby scrambler are all connected between the 2nd ASI distribution amplifier and the second switch.In front-end digital TV, the parameter of multiplexer and scrambler is the most complicated, and setup time is long, is the core of digital front-end system, adopts active and standby redundant fashion to automatically switch within the system; Especially network management system is the most important thing in system backup, takes dual-computer redundancy to automatically switch within the system, guarantees information backup.
Described satellite receiver is connected with satellite-signal.
Described encoder is connected with video-audio signal.
Compared with prior art, the invention has the beneficial effects as follows:
1, all parts in this front-end digital television system all can store respective information, core component multiplexer wherein and scrambler all arrange two, carry out double copies, dual-computer redundancy is taked to automatically switch, avoid loss of data, ensure the safe broadcast of digital TV front-end, improve the reliability of system.
2, switch and ASI distribution amplifier are set within the system in many places, ensure data according to given line transmit while and transmission of information is amplified, obtain last information clearly, and information is backed up, facilitate later data to recover, ensure the safe broadcast of digital TV front-end.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited thereto.
Embodiment 1:
As shown in fig. 1, the present invention includes front-end digital television system, comprise satellite receiver, encoder, multiple ASI distribution amplifier, multiple switch, multiplexer, scrambler, adapter, QAM modulation device and TV set-top box, described satellite receiver and encoder are all connected on an ASI distribution amplifier, also connection multiplexing device, the first switch, the 2nd ASI distribution amplifier, scrambler, the second switch and the 3rd ASI distribution amplifier successively at an ASI distribution amplifier rear; Payload attach fitting and QAM modulation device is gone back between the 3rd ASI distribution amplifier and TV set-top box.
For the signal of satellite receiver and encoder encodes, first after signal amplifies by ASI distribution amplifier, pass to multiplexer again, multiplexer connects scrambler through switch and again amplifies the signal of transmission simultaneously, the signal of scrambler transmission passes to adapter and QAM modulation device through switch, finally passes to TV set-top box.Core component multiplexer wherein and scrambler all arrange two, carry out double copies, take dual-computer redundancy to automatically switch, avoid loss of data, ensure the safe broadcast of digital TV front-end, improve the reliability of system.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of embodiment 1 is as follows: restorer comprises master reset device and standby restorer, and two restorers are all connected between an ASI distribution amplifier and the first switch.
Described scrambler comprises main scrambler and standby scrambler, and main scrambler and standby scrambler are all connected between the 2nd ASI distribution amplifier and the second switch.
In front-end digital TV, the parameter of multiplexer and scrambler is the most complicated, and setup time is long, is the core of digital front-end system, adopts active and standby redundant fashion to automatically switch within the system; Especially network management system is the most important thing in system backup, takes dual-computer redundancy to automatically switch within the system, guarantees information backup.
Described satellite receiver is connected with satellite-signal.
Described encoder is connected with video-audio signal.
Just this invention can be realized as mentioned above.
Claims (5)
1. front-end digital television system, it is characterized in that: comprise satellite receiver, encoder, multiple ASI distribution amplifier, multiple switch, multiplexer, scrambler, adapter, QAM modulation device and TV set-top box, described satellite receiver and encoder are all connected on an ASI distribution amplifier, also connection multiplexing device, the first switch, the 2nd ASI distribution amplifier, scrambler, the second switch and the 3rd ASI distribution amplifier successively at an ASI distribution amplifier rear; Payload attach fitting and QAM modulation device is gone back between the 3rd ASI distribution amplifier and TV set-top box.
2. front-end digital television system according to claim 1, is characterized in that: described restorer comprises master reset device and standby restorer, and two restorers are all connected between an ASI distribution amplifier and the first switch.
3. front-end digital television system according to claim 1, is characterized in that: described scrambler comprises main scrambler and standby scrambler, and main scrambler and standby scrambler are all connected between the 2nd ASI distribution amplifier and the second switch.
4. front-end digital television system according to claim 1, is characterized in that: described satellite receiver is connected with satellite-signal.
5. front-end digital television system according to claim 1, is characterized in that: described encoder is connected with video-audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595090.3A CN104363467A (en) | 2014-10-30 | 2014-10-30 | Front end digital television system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595090.3A CN104363467A (en) | 2014-10-30 | 2014-10-30 | Front end digital television system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104363467A true CN104363467A (en) | 2015-02-18 |
Family
ID=52530686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410595090.3A Pending CN104363467A (en) | 2014-10-30 | 2014-10-30 | Front end digital television system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104363467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115695912A (en) * | 2022-10-27 | 2023-02-03 | 北京华建云鼎科技股份公司 | Multi-channel ASI signal processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030081686A1 (en) * | 2001-11-01 | 2003-05-01 | Joon-Young Jung | PSIP converter and converting method and digital cable television broadcasting system using the PSIP converter |
| CN1852447A (en) * | 2006-03-28 | 2006-10-25 | 华为技术有限公司 | System and method for realizing backup of scrambler |
| CN103841439A (en) * | 2014-02-26 | 2014-06-04 | 广西广播电视信息网络股份有限公司 | Method for achieving CA seamless reception of set top box through synchronous output of double scramblers |
-
2014
- 2014-10-30 CN CN201410595090.3A patent/CN104363467A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030081686A1 (en) * | 2001-11-01 | 2003-05-01 | Joon-Young Jung | PSIP converter and converting method and digital cable television broadcasting system using the PSIP converter |
| CN1852447A (en) * | 2006-03-28 | 2006-10-25 | 华为技术有限公司 | System and method for realizing backup of scrambler |
| CN103841439A (en) * | 2014-02-26 | 2014-06-04 | 广西广播电视信息网络股份有限公司 | Method for achieving CA seamless reception of set top box through synchronous output of double scramblers |
Non-Patent Citations (2)
| Title |
|---|
| 林毅: "地市级广播电视网络数字电视系统建设思路初探", 《东南传播》 * |
| 汪振相: "新一代数字电视前端平台", 《有线电视技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115695912A (en) * | 2022-10-27 | 2023-02-03 | 北京华建云鼎科技股份公司 | Multi-channel ASI signal processing system |
| CN115695912B (en) * | 2022-10-27 | 2023-06-06 | 北京华建云鼎科技股份公司 | Multipath ASI signal processing system |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20150218 |