JP2005051543A - Video signal conversion device and video signal conversion method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video signal conversion device and a video signal conversion method, wherein a user automatically performs select and set a color system in a system without being conscious of the setting of the color system. <P>SOLUTION: The video signal conversion device is provided with; a digicom filter 2 which separates video signal information from a composite input signal (V) and converts it to a Y/C separated video signal (S); a chroma decoder 2 which separates other video signal information of video signal information from the Y/C separated video signal (S) and converts it to a component signal (C); a microcomputer 3 which sets parameters for conversion in the digicom filter 1 and the chroma decoder 2; and an output means which outputs the Y/C separated video signal and the component signal (C). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to video signal system conversion and a color system discrimination system performed at that time.

  In Patent Document 1, for the purpose of automatic discrimination of television receivers compatible with all color systems, it is composed of a microcomputer and a video / chroma processing IC, and an identity killer signal relating to the carrier frequency of the system and an amplitude relating to amplitude. The color system is automatically identified using the killer signal, the vertical line number signal for the vertical frequency, and the vertical lock signal that determines whether the vertical frequency of the input video signal matches the current color system settings. An automatic color system discrimination device for a television receiver is disclosed.

JP 2000-1948 A

  The automatic discrimination device of the color system disclosed in Patent Document 1 is limited to other color systems such as PAL, SECAM, and NTSC, for example, PAL60, SECAM60, and NTSC50 having a vertical frequency of 60 Hz of an input video signal. Therefore, for example, input video signals of various systems are input to an audio video amplifier (AV amplifier) from a video deck that reproduces video signals recorded on various recording media, and the video signals are converted by the AV amplifier. When displaying an image using the output video signal after conversion on a projector or the like, there is a disadvantage that it is necessary to prepare a color system conversion apparatus for each input video signal system.

  Accordingly, an object of the present invention is to provide a video signal conversion apparatus and a video signal conversion method that automatically select and set a color system setting in the system without the user being aware of it.

  In order to solve the above problems and achieve the object of the present invention, a video signal conversion apparatus according to the present invention is a first conversion means for dividing video signal information from composite video signal information and converting it into first separated video signal information. And second conversion means for separating other video signal information from the first separated video signal information into second separated video signal information, first conversion means, and second conversion means Comprises setting means for setting parameters at the time of conversion and output means for outputting first separated video signal information and second separated video signal information.

  Thus, the first conversion means divides the video signal information from the composite video signal information and converts it into the first separated video signal information. The second conversion means separates the other video signal information of the video signal information from the first separated video signal information and converts it into second separated video signal information. The setting means, for example, performs a setting for automatically changing a color television system signal as a parameter at the time of conversion in the first conversion means and the second conversion means. Also, the color television system signal is determined based on the first separated video signal information. The output means outputs the first separated video signal information and the second separated video signal information.

  In the video signal conversion method of the present invention, the step of dividing the video signal information from the composite video signal information by the first conversion means and converting it into the first separated video signal information, and the first conversion means by the first conversion means. Separate video signal information from the separated video signal information and converting it to second separated video signal information, and setting of parameters at the time of conversion in the first conversion means and the second conversion means And a step of outputting the first separated video signal information and the second separated video signal information by the output means.

  Thus, the first conversion means divides the video signal information from the composite video signal information and converts it into the first separated video signal information. The second conversion means separates the other video signal information of the video signal information from the first separated video signal information and converts it into second separated video signal information. The setting means, for example, performs a setting for automatically changing a color television system signal as a parameter at the time of conversion in the first conversion means and the second conversion means. Also, the color television system signal is determined based on the first separated video signal information. The output means outputs the first separated video signal information and the second separated video signal information.

  According to the present invention, the setting of parameters at the time of conversion in the first conversion means and the second conversion means can be automatically selected in the system without the user being conscious. In the present invention, it is possible to make a setting for automatically changing the color television system signal regardless of the type of the input signal, and it is possible to determine the color system signal. Therefore, the user does not need to change the parameter settings of the first conversion means and the second conversion means in consideration of the color system and signal type of the input signal, so that the operability is improved.

FIG. 1 is a block diagram showing a configuration of a video signal conversion apparatus according to an embodiment of the present invention.
First, the configuration of the video signal conversion apparatus will be described.
The video signal conversion apparatus according to the embodiment of the present invention separates the video signal information from the color composite video signal (hereinafter referred to as composite signal) (V) of the composite video signal information and outputs the first separated video signal information. Y / C separated video signal (Y / C Separate signal: Yi = luminance signal (Y component of Y / C separated video signal, Ci = chroma signal (C component of Y / C separated video signal) (S)) And a Digicom filter 1 which is one conversion means.

  The video signal conversion apparatus separates the other video signal information of the video signal information from the Y / C separated video signal (S) of the first separated video signal information to obtain a component signal (Yo of the second separated video signal information). = Output luminance signal, Uo = R−Y = Output color difference signal 1, Vo = B−Y = Output color difference signal 2) and a chroma decoder 2 which is a second conversion means for converting into (C). .

  The video signal conversion apparatus is a microcomputer (hereinafter referred to as a microcomputer) which is a setting means for setting parameters at the time of conversion in the Digicom filter 1 as the first conversion means and the chroma decoder 2 as the second conversion means. 3.

  The video signal conversion apparatus includes an output unit that outputs the Y / C separated video signal (S) of the first separated video signal information and the component signal (C) of the second separated video signal information. The

  Here, the microcomputer 3 as the setting means is configured to automatically change the color television system signal in the digital converter 1 as the first conversion means and the chroma decoder 2 as the second conversion means. The Further, the microcomputer 3 as setting means is configured to determine a color television system signal based on the first separated video signal information.

  In FIG. 1, IC001 indicates a digital filter 1, IC002 indicates a chroma decoder 2, and IC003 indicates an embedded microcomputer 3.

  Here, the composite video signal information corresponds to the color composite video signal (V), the first separated video signal information corresponds to the Y / C separated video signal (S), and the second separated video signal information corresponds to the component signal (C). To do. The first converting means corresponds to a digital filter, the second converting means corresponds to a chroma decoder, and the setting means corresponds to a microcomputer.

Next, the operation of the video signal conversion apparatus configured as described above will be described.
FIG. 2 is a flowchart showing the operation.
The settings of the digital filter 1 and the chroma decoder 2 need to be changed depending on the color system of the input video signal. In the present invention, the setting of the color system of the Digicom filter 1 and the chroma decoder 2 is automatically selected within the system without the user being aware of it.

  In FIG. 1, the digital filter 1 performs Y / C separation of the composite signal input (V) to generate a luminance signal (Yi) and a chroma signal (Ci) of the Y / C separated video signal (S).

  The chroma decoder 2 automatically discriminates the NTSC / PAL / SECAM color system and subcarrier frequency in accordance with the input chroma signal (Ci). At this time, even when the setting (DSET) of the Digicom filter 1 does not match that of the color system, automatic determination is performed.

  At this time, the digital system 1 and the chroma decoder 2 initialize the color system setting (DSET) of the digital filter 1 and the color system setting (CSET) of the chroma decoder 2 in accordance with step S1 of the flowchart of FIG.

  The chroma decoder 2 separates the input luminance signal (Yi) into a horizontal synchronizing signal and a vertical synchronizing signal. The chroma decoder 2 compares the separated horizontal synchronizing signal with the divided signal of the voltage controlled oscillation signal output from the oscillator of the voltage controlled oscillator VCO (not shown), and automatically determines whether it is synchronous or asynchronous.

  The microcomputer 3 acquires from the chroma decoder 2 the automatic discrimination result (INF) of the discrimination information (color system, input signal (presence / absence)) of the chroma decoder 2 through the I2C communication bus according to step S2 of the flowchart of FIG.

The microcomputer 3 changes the color system setting (DSET) of the digital filter 1 in accordance with steps S3 and S4 in the flowchart of FIG.
The microcomputer 3 changes the color system setting (CSET) of the chroma decoder 2 according to steps S3 and S4 in the flowchart of FIG.

Next, a use state is demonstrated using FIG.
In FIG. 3, when the composite input signal (V) is input from the video deck 11 to the composite input terminal 16 of the AV amplifier 13, the digicom filter 14 of the AV amplifier 13 separates the composite signal input (V) by Y / C and Y A luminance signal (Yi) and a chroma signal (Ci) of the / C separated video signal (S) are generated.

  The Y / C separated video signal (S) generated from the digital comb filter 14 is supplied to the chroma decoder 2. Also, when the Y / C separated video signal (S) is input from the video deck 11 to the S input terminal 17 of the AV amplifier 13, the Y / C separated video signal (S) is directly supplied to the chroma decoder 15.

  The chroma decoder 15 converts the Y / C separated video signal (S) into a component signal (C) and outputs it to the component output terminal 21. Also, when the component signal (C) is input from the DVD (Digital Versatile Disc) player 12 to the component input terminal 18 of the AV amplifier 13, the component signal (C) is directly output to the component output terminal 21.

  The component signal (C) output from the component output terminal 21 is supplied to the projector 22, and the projector 22 displays a video image based on the component signal (C).

  At this time, as shown in FIG. 2, the color system setting (DSET) of the digital filter 1 and the color system setting (CSET) of the chroma decoder 15 are initially set in the digital filter 1 and the chroma decoder 15.

  The chroma decoder 15 separates the input luminance signal (Yi) into a horizontal synchronizing signal and a vertical synchronizing signal. The chroma decoder 15 compares the separated horizontal synchronizing signal with the divided signal of the voltage controlled oscillation signal output from the oscillator of the voltage controlled oscillator VCO (not shown), and automatically determines the synchronization and the asynchronization.

  A microcomputer (not shown) obtains an automatic discrimination result (INF) of discrimination information (color system, input signal (presence / absence)) of the chroma decoder 15 from the chroma decoder 15 via the I2C communication bus.

  A microcomputer (not shown) changes the color system setting (DSET) of the digital filter 14 from the automatic discrimination result. A microcomputer (not shown) changes the color system setting (CSET) of the chroma decoder 15 from the automatic discrimination result.

  Thereby, the setting of the digital comb filter 14 is automatically selected in the system without the user being aware of it.

  When the composite input signal (V) is input from the video deck 11 to the composite input terminal 16 of the AV amplifier 13, the composite signal (V) is directly output from the composite output terminal 19 of the AV amplifier 13, and the video deck 11, when the Y / C separated video signal (S) is input to the S input terminal 17 of the AV amplifier 13, the Y / C separated video signal (S) is directly output from the S output terminal 20 of the AV amplifier 13. .

  In the above-described embodiment, the case where the composite input signal (V) is converted into the Y / C separated video signal (S) and the component signal (C) has been described. However, the present invention is not limited thereto, and the component signal (C ) To further divide other video signal information into D terminal output signals (D1 terminal output signal, D2 terminal output signal, D4 terminal output signal of the third separated video signal information, such as R, G, B and transmission speed) It may be applied to the case of conversion to a control signal.

  Further, the present invention may be applied when a component signal (C) is added to an IEEE1394 interface signal.

  In the present invention, even when the composite input signal (V) and the Y / C separated video signal (S) are input from the video deck 11 to the AV amplifier 13, the component signal (C) is input from the DVD player 12 to the AV amplifier 13. Then, it can be used when displaying a video image based on the component signal (C) similar to the video image based on the component signal (C) output to the projector 22 and displayed by the projector 22.

It is a block diagram which shows calibration of the video signal converter of embodiment in this invention. It is a flowchart which shows operation | movement. It is a figure explaining a use condition.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Digicom filter, 2 ... Chroma decoder, 3 ... Microcomputer, V ... Composite signal, S ... Y / C separation video signal, C ... Component signal, INF ... Discrimination information (color system, input signal (presence / absence))) , DSET: Digicom filter color system setting, CSET: Chroma decoder color system setting, 11: VCR, 12: DVD player, 13: AV amplifier, 14: Digicom filter, 15: Chroma decoder, 22: Projector

Claims (6)

First conversion means for separating the video signal information from the composite video signal information and converting it to first separated video signal information;
Second conversion means for dividing other video signal information of the video signal information from the first separated video signal information into second separated video signal information;
Setting means for setting parameters at the time of conversion in the first conversion means and the second conversion means;
A video signal conversion apparatus comprising: output means for outputting the first separated video signal information and the second separated video signal information. The video signal converter according to claim 1, wherein
The video signal conversion apparatus characterized in that the setting means automatically changes a color television system signal at the time of conversion by the first conversion means and the second conversion means. The video signal converter according to claim 2, wherein
The video signal converter according to claim 1, wherein the setting means determines the color television system signal based on the first separated video signal information. Separating the video signal information from the composite video signal information by the first conversion means and converting it into the first separated video signal information;
Separating the other video signal information of the video signal information from the first separated video signal information by the second conversion means and converting it into second separated video signal information;
Performing setting of parameters at the time of conversion in the first conversion means and the second conversion means by a setting means;
And outputting the first separated video signal information and the second separated video signal information by output means. The video signal conversion method according to claim 4, wherein
The video signal conversion method, wherein the setting means automatically changes a color television system signal at the time of conversion by the first conversion means and the second conversion means. The video signal conversion method according to claim 5, wherein
The video signal conversion method, wherein the setting means discriminates the color television system signal based on the first separated video signal information.

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