JP2007281842A - Video processing device - Google Patents

Abstract

In a video processing apparatus having two skirt connectors, power consumption is reduced when an AV2 through function is not used.
A video / audio output switching circuit having first and second connectors for switching a video / audio output of a first connector between a video / audio signal from a recording / playback unit and an input signal from a second connector. In the video processing apparatus, the video signal detection unit detects the input of the video / audio signal from the second connector, and the power of the output switching unit is controlled to be turned on / off based on the detection result of the video signal detection unit. The power supply of the main body can be controlled when the apparatus does not use AV2 through, and the power consumption of the main body can be reduced.
[Selection] Figure 1

Description

  The present invention relates to a power supply control device for video equipment, and more particularly to a video processing apparatus capable of reducing power consumption of equipment such as a DVD video recorder and a VCR (video cassette recorder).

  FIG. 3 shows a pin specification of AV21 pin which is widely used for connection of audiovisual equipment mainly in Europe. Connection of video / audio equipment using an AV21 pin connector (hereinafter referred to as a skirt connector) in the CENELEC standard (EN 50 049-1: 1989) enables input / output of video, audio, and control signal signals with a single cable. This is a connection format, and is widely used as a signal transmission connection method between video / audio devices such as TVs and DVD recorders and video / audio output devices such as set-top boxes.

  FIG. 3 shows the AV21 pin connector specifications. The numbers in the figure indicate the terminal numbers. The main terminals will be described. The first terminal is an audio output (Rch) terminal, the second terminal is an audio input (Rch) terminal, the third terminal is an audio output (Lch) terminal, and the fourth terminal is an audio input (Lch). The terminal, the eighth terminal is a control terminal (Slow terminal), the nineteenth terminal is a video output terminal, and the twentieth terminal is a video input terminal. Among the AV21 pin configuration pins, the eighth terminal, which is a control signal transmission terminal, is used as a terminal for notifying the connection partner of the reproduction output of the video / audio signal. For example, the video / audio equipment and TV are connected by a skirt connector. When connected, the audio / video device outputs the 8th terminal to high level or middle level (when the aspect ratio of the playback image is 16: 9) only when the audio / video being output is playback output. This is used for a method of causing the TV side to detect that the video / audio output is a reproduction output. Thereby, the TV side can automatically switch the input to the output of the connected video / audio device. AV2 through (cascade through operation) is a function of such an audiovisual apparatus having two skirt connectors. AV2 through will be described with reference to FIG.

AV2 through is a function for the purpose of outputting video / audio input from the second video / audio device 13 to the first video / audio device 12 when the video / audio recording device 3 is in the power-off mode. The video / audio recording device 3 having two skirt connectors, the connector 1 and the second connector 2, is connected to one skirt connector, the first connector 1 is connected to the first video / audio device 12 (TV or the like), and the other skirt is connected. With the connector and the second connector 2 connected to the second video / audio device 13 (such as a set top box), the video / audio output switching circuit 4 of the video / audio recording device 3 is connected to the second connector 2 input side. This is realized by switching to a. Therefore, when the video / audio recording device 3 is in the power-off mode, the output of the second video / audio device 13, that is, the video / audio input from the second connector 2 (AV2 input) is sent to the first video / audio device 12, the first connector. 1 (AV1 output), the video recording apparatus having the AV2 through function, which is called AV2 through, does not use the AV2 through function, that is, the first connector 1 and the second connector 2 In the power-off state of the video / audio recording device 3 having one skirt connector, the first connector 1 is connected to the first video / audio device 12, but the second connector 2 is not connected to other video / audio devices. When the first connector and the second connector are not connected to other video / audio equipment, it is not necessary to use an AV2 through circuit. An apparatus for reducing power consumption of an image recording device will be described with reference to FIG. 5 (see Patent Document 1).

Is a power control device for video equipment that uses the DC control voltage of the skirt connector No. 8 terminal to control the power supply of the main body in order to reduce power consumption when the power is turned off in the video equipment. When the video / audio recording device 3 is turned off, the presence / absence of the video / audio signal input from the second connector 2 is detected by the DC applied voltage of the skirt connector No. 8 terminal. The 8th terminal input of the second connector 2 is detected by the control microcomputer, and the control microcomputer 7 supplies power to the video / audio output switching circuit unit 4 depending on whether or not the DC voltage is applied from the 8th terminal. On / off control of the power supply of the power supply device 8 that can be controlled on and off (hereinafter referred to as a controllable power supply device) is performed. By using such a configuration, the power source of the video / audio output switching circuit unit 4 can be controlled when there is no video / audio input accompanying the input of the DC applied voltage of the eighth terminal from the second connector 2. Since power is not supplied from the power supply device 8, the power consumption of the video / audio recording device 3 can be reduced.
JP-A-7-226891

  An object of the present invention is to reduce power consumption in a video processing apparatus having two skirt connectors when the AV2 through function is not used.

  In the configuration like the prior art, since the video / audio input of the second connector is detected by the 8th terminal, the video / audio output device which does not output the control DC voltage of the 8th terminal is used. In some cases, video / audio input cannot be detected, and the main body power supply of the video recording device is not controlled. For this reason, the present invention provides a video processing apparatus capable of detecting video / audio input and controlling the main body power supply of the video recording apparatus even if the control DC voltage is not input to the eighth terminal of the skirt connector. The purpose is to do.

  As means for solving the above-described problems, the video processing apparatus of the present invention includes power supply means for supplying power to each means in the apparatus, connector means using pin terminals, and presence / absence of a video signal input from the connector means. Detecting means for detecting the recording signal, recording / reproducing means for recording or reproducing the input signal from the connector means, and control so that the power supply means does not supply power to the recording / reproducing means when the detecting means does not detect the video signal. Control means.

  Further, it further comprises output switching means for outputting an output signal of the recording / reproducing means or a signal inputted from the connector means according to the output of the detecting means, and the control means is configured such that the output switching means is disconnected from the connector means when the apparatus is turned off. Control to output the input signal.

  Further, a low-pass filter is further provided in front of the detection means, and the detection means has detection sensitivity capable of detecting a non-standard signal level signal such as a weak electric field video signal or a scrambled video signal.

  By using the video processing apparatus configured as in the present invention, when no video signal is input, no power is supplied to the recording / reproducing means, and the power consumption of the apparatus can be reduced.

  Further, it further comprises output switching means for outputting an output signal of the recording / reproducing means or a signal inputted from the connector means according to the output of the detecting means, and the control means is configured such that the output switching means is disconnected from the connector means when the apparatus is turned off. Even in a video processing apparatus having a means for outputting a video signal input from the connector means without passing through the recording / reproducing means by controlling to output the input signal, when there is no video signal input, Since no power is supplied to the output switching means, the power consumption of the apparatus can be reduced.

  In addition, a low-pass filter is further provided in front of the detection means, and the detection means is provided with a detection sensitivity capable of detecting a non-standard signal level signal such as a weak electric field video signal or a scrambled video signal. Regardless, video input can be detected, and when there is video input, the power supply of the apparatus is driven, and when there is no video input, power consumption of the apparatus can be reduced.

  The best mode for carrying out the present invention will be described below with reference to FIGS.

(Embodiment 1)
FIG. 1 is a configuration diagram of a video processing apparatus according to an embodiment of the present invention. FIG. 2 is an operation flow of the video processing apparatus according to the embodiment of the present invention. In the figure, 1 is a first connector mainly connected to a TV, and 2 is a second connector connected to an external device such as a set top box. Reference numeral 3 denotes a video / audio recording device main body, which includes a video / audio signal output switching circuit unit 4, a video / audio input circuit unit 5, a video signal detection unit 6, a control microcomputer 7, and a controllable power supply unit 8. The operation will be described below. The video / audio signal input from the second connector 2 passes through the video / audio input circuit unit 5 and is output to the video / audio recording / reproducing unit 9 and the terminal a of the video / audio output switching circuit unit 4. Further, the video signal input from the second connector 2 is also input to the video signal detector 6. The video signal detection unit 6 detects the presence or absence of a video signal input from the second connector 2 and notifies the control microcomputer 7 of the detection information. The video signal detector 6 may use, for example, a horizontal sync signal or a vertical sync signal detection circuit for a composite video signal.

  The video signal detection unit 6 has a first detection sensitivity capable of detecting a normal video signal level and a second detection sensitivity capable of detecting any video signal having a non-standard signal level of a weak electric field video signal or a scrambled video signal. The video signal detection at the first detection sensitivity and the video signal detection at the second detection sensitivity are performed in parallel, and if the video signal is detected at any detection sensitivity, the video signal is sent to the control microcomputer. A configuration for notifying that there is a video signal may be used, or if a video signal is not detected at the first detection sensitivity, a video signal detection at the second detection sensitivity is performed, and the detection information is notified to the control microcomputer. It may be used.

  In addition, the video signal detection unit having the second detection sensitivity adds a low-pass filter to the preceding stage of the detection circuit of the horizontal synchronization signal detection or vertical synchronization detection circuit of the composite video signal, for example, and is input to the video signal detection unit You can use a video signal detection circuit with higher detection sensitivity by removing noise components in the non-standard video signal in advance, or use a comparator or analog / digital converter with a certain threshold to A circuit for detecting the presence or absence may be used.

  When the control microcomputer 7 receives the notification of the presence of the video signal from the video signal detection unit 6, the control microcomputer 7 controls the power supply of the controllable power supply device 8 to turn on in order to output video and audio to the first connector 1. Power is supplied to the audio output switching circuit unit 4.

  The video / audio output switching circuit unit 4 is a power supply device that can be controlled by the control microcomputer 7 when the video / audio is input from the second connector 2 and the control microcomputer 7 switches the switching circuit to the a side. Since power is supplied from 8, the video / audio signal input from the second connector 2 is transmitted to the first connector 1. When there is no video / audio input from the second connector 2, power is not supplied from the controllable power supply device 8, and power consumption is reduced.

  When a video is input from the second connector 2 by the controllable power supply device 8 of the video recording device 3, the video / audio signal input to the second connector 2 is transmitted to the first connector 1. When the video signal is not input from the second connector 2 (that is, when the AV2 through function is not used), the video / audio output switching circuit unit 4 is not turned on. The power consumption of the main body power source 3 is reduced.

  The video processing apparatus according to the present invention can be applied to an application that can save power consumption of devices such as a DVD video recorder and a VCR (video cassette recorder).

Configuration diagram of a video processing apparatus according to an embodiment of the present invention Operation flowchart of video processing apparatus according to an embodiment of the present invention Terminal configuration diagram of AV21 pin connector in CENELEC standard Explanatory diagram of AV2 through, which is the prior art Configuration diagram of a conventional video processing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st connector 2 2nd connector 3 Video / audio recording equipment 4 Video / audio output switching circuit unit 5 Video / audio input circuit unit 6 Video signal detection unit 7 Control microcomputer 8 Controllable power supply device 9 Video / audio recording / reproducing unit 10 Video Signal detection unit first detection sensitivity 11 Video signal detection unit second detection sensitivity

Claims (3)

Power supply means for supplying power to each means in the apparatus, connector means using pin terminals, detection means for detecting the presence or absence of a video signal input from the connector means, and input signals from the connector means Recording / reproducing means for recording or reproducing, and control means for controlling the power supply means to supply power to the recording / reproducing means when a video signal is detected by the detecting means. Video processing device. Output switching means for outputting an output signal of the recording / reproducing means or a signal input from the connector means according to the output of the detection means, further comprising: an output switching means for controlling the output switching means when the apparatus is powered off. 2. The video processing apparatus according to claim 1, wherein control is performed so as to output a signal input from the connector means. The low-pass filter is further provided in front of the detection means, and the detection means has detection sensitivity capable of detecting a signal of a non-standard signal level of a weak electric field video signal or a scrambled video signal. Alternatively, the video processing apparatus according to claim 2.

Images