KR0141135B1 - Apparatus for converting into adaptive regenerate process - Google Patents

Abstract

The reproducing method converting apparatus and method are for converting the reproducing method of the recording and reproducing apparatus to the reproducing method of the display apparatus when the reproducing method is different between the recording and reproducing apparatus and the display apparatus. To this end, a playback method conversion circuit for converting a playback method to be adaptively reproduced according to the playback method of the display apparatus by adjusting the scan line of the playback signal of the recording / playback apparatus according to the playback method setting playback signal applied by the user. It is configured to include. Therefore, it is possible to be compatible between the recording and reproducing apparatus and the display apparatus having different reproduction methods.

Description

Regeneration method switching device and method

1 is a block diagram of a camera-integrated video cassette recorder for converting a playback method according to the present invention.

2 is a specific circuit diagram of a reproduction mode conversion circuit of the video cassette recorder shown.

3 is a detailed circuit diagram of an encoder of the video cassette recorder shown in FIG.

4 shows the line relationship between NTSC and PAL.

5 (A) and (B) show a frame relationship in converting a playback method between NTSC and PAL.

6 is a flowchart illustrating an output method switching method according to the present invention.

* Explanation of symbols for main parts of the drawings

100: camera 200: recording signal processing circuit

300: recording medium 400: reproduction signal processing circuit

500: Regeneration method conversion circuit 600: Encoder

506: synchronizing signal separator 510: playback type conversion control unit

511: address generator 512: memory

The present invention relates to a reproducing method converting apparatus and method for outputting a reproduced signal in a video signal processing apparatus, and more particularly, to a reproducing method converting apparatus and method for converting a method of a reproduced signal according to a broadcasting method employed in a display apparatus will be.

In general, a video signal processing apparatus records and reproduces a video signal, and includes a video cassette recorder, a video camera, and a camera integrated video cassette recorder. Such a video signal processing apparatus has a problem in that it is not easy to use in different broadcasting systems because the video signal processing apparatus is configured and used as a mechanism or a circuit for recording and reproducing according to the TV broadcasting system of each country.

For example, a camera-integrated video cassette recorder (hereafter referred to as a camcorder) in which the shooting mode and the recording / playback mode are set by the NTSC (National Televsion System Committee) method may have different broadcasting methods depending on the movement characteristics of the camcorder. Can be used in the country of origin. In this case, the display device and the playback format do not match, and display is impossible. That is, playback was not possible through a display device employing PAL (Phase Alternation by Line) or SECAM (Sequentiel Couleur A Memoir) broadcasting. There are many reasons for the regeneration not possible, especially because the injection player is 525 for NTSC and 625 for PAL or SECAM.

It is therefore an object of the present invention to reproduce a playback method converting apparatus and method for adaptively converting a playback method according to a method employed in a display apparatus for a video signal played back in a recording and playback apparatus.

Another object of the present invention is to provide a reproducing method converting apparatus and method for converting a reproducing method of a recording and reproducing apparatus by adjusting different scanning methods between the recording and reproducing apparatus and the display apparatus using a memory.

In order to achieve the above object, the present invention includes a camera as a video signal source and converts a playback signal of a camera-integrated video cassette recorder for recording and playing back a video signal applied from the camera according to a broadcast method. In the apparatus; And a reproducing method converting circuit for converting the reproducing method so that the reproducing signal can be adaptively reproduced to a display device fixed according to the broadcasting method in accordance with a reproducing method setting control signal applied by a user.

In the playback method conversion method for converting the playback signal of the camera-integrated video cassette recorder for recording and playing back the video signal applied from the camera in accordance with the broadcast method to achieve the above object, A reproduction method setting process for setting a reproduction method of the reproduction signal in accordance with the broadcasting method employed in an output device for outputting a reproduction signal of the video cassette recorder; If the method employed between the video cassette recorder and the output device is different from each other in the setting method of the reproduction method, the scanning method of the reproduction signal of the video cassette recorder is adjusted to suit the reproduction method of the output device. It is characterized in that it comprises a playback method conversion process.

Next, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a camcorder for converting a playback method according to the present invention, and includes a recording signal processing circuit for recording signal processing of a video signal output from the camera 100 and the camera 100 as a video image signal source ( 200, a recording medium 300 for recording or reproducing an image signal output from the recording signal processing circuit 200, and a reproduction signal processing circuit 400 for reproducing signal processing a video signal reproduced from the recording medium 300. And the reproduction method described above with respect to the signal output from the reproduction method conversion circuit 500 and the reproduction method conversion circuit 500 for reproducing the signal reproduced by the reproduction signal processing circuit 400 according to the reproduction method set by the user. The encoder 600 is coded by a setting control signal and output to a display device (not illustrated).

Here, the reproduction mode setting control signal is a conversion mode setting control signal for setting whether to convert the reproduction method and a reproduction mode mode setting signal, that is, the NTSC / PAL mode setting signal shown in the present embodiment (where the conversion mode is set to NTSC and PAL only). As described above, since NTSC is a representative broadcasting method having 525 scan lines and PAL is a typical method having 625 scan lines, the present embodiment uses NTSC / PAL mode setting signals for convenience of expression, but it has substantially 525 scan lines and 625 scan lines. Control signal for controlling the conversion mode between the reproduction signals. For example, if the camcorder currently used is NTSC and the display device is PAL, the above-mentioned conversion mode setting playback signal is applied as a signal indicating the intention to convert, and the NTSC / PAL signal is supplied with a control signal such that the playback signal is output in the PAL method. do. The control signal may be output from the system control means (not illustrated) or may be output from an external mode switch according to the control signal of the key input means (not illustrated).

FIG. 2 is a detailed circuit diagram of a reproduction mode conversion circuit 500 of the camcorder shown in FIG. 1, and shows a luminance / color signal for separately outputting a luminance signal and a color signal from a composite video signal output from the reproduction signal processing circuit 400. FIG. (Y / C) separator 501, a first A / D converter 502 for converting the luminance signal output from the luminance / color signal separator 501 into a digital signal, and the luminance / color signal separator 501 In the second A / D converter 503 for converting the color signal into the digital signal, the color signal demodulator 504 for demodulating the color signal output from the second A / D converter 503 with the color difference, and in the first A / D converter 502. Separating the synchronization signal from the luminance signal output from the first mixer 505 and the luminance / color signal separator 501 for mixing the output luminance signal and the color difference signal output from the color signal demodulator 504 in series. Output from the synchronization signal separator 506 and the synchronization signal separator 506 A reproduction mode conversion reproducing unit 510 for controlling reproduction mode conversion by recording and reading a signal reproduced by the synchronization signal and the above-described conversion mode setting control signal applied from the outside, and applied from the first mixer 505, Reproduction method conversion First ID / A for converting the composite video signal output from the reproduction unit 510 into the luminance and color signal, and the luminance signal separated and output from the data separator 514 to an analog signal The second ID / A converter 522 for converting the first color difference signal from the color signal separated and output from the converter 521 and the data separator 514 to the analog signal, and the second color difference signal separated and output from the data separator 514 Generates a synchronization signal for each reproduction method according to the display device (not illustrated) by the synchronization signal output from the third ID / A converter 523 and the synchronization signal separator 506 for converting into an analog signal. The first to third ID / A converters 521 to 523, which are reproduced by the signals output from the reproducing method synchronous signal generator 507 and the synchronous signal generator 507 according to the reproducing method, and NTSC / PAL control signals applied from the outside. It consists of an encoder (600) for coding the video signal output from.

In this case, the reproduction method converting / reproducing unit 510 includes a memory 512 for recording and reading image signals applied in series from the first mixer 505, and the first mixer 505 by a conversion mode setting reproduction signal applied from the outside. And the selection means 513 for selectively outputting the signal output from the memory 512, and the address of information written and read in the memory 512 by the synchronization signal output from the synchronization signal separator 506. The address generator 511 is provided. Here, the selecting means 513 is constituted by a multiplexer, and the memory 512 is constituted by a dual port video RAM capable of simultaneously writing and reading.

3 is a detailed circuit diagram of the encoder 600 in the camcorder of FIG. 1, in which a first encoder 602 and a second encoder 603 are coded to be coded according to a reproduction method of a display apparatus (not illustrated). To select whether to apply the signal output from the first to third ID / A converters 521 to 523 to the first encoder 602 or the second encoder 603 by an external NTSC / PAL control signal. A second signal for selectively transmitting the signals output from the first selection means 601 and the first and second encoders 602 and 603 to the display apparatus by the NTSC / PAL signal applied to the first selection means 601. Selection means 604. Here, the first encoder is for encoding a reproduction signal having 525 scan lines, and the second encoder is for encoding a reproduction signal having 625 scan lines. The former is for NTSC output from the synchronization signal generator 507 for each reproduction method. The latter is controlled and coded by the synchronization signal, and the latter is controlled and coded by the PAL synchronization signal output from the synchronization signal generator 507 for each reproduction scheme.

4 shows a scanning line relationship between a broadcast signal having 525 scan lines NTSC and 625 scan lines PAL. SECAM (Sequentiel Couleur An Momoire) method has 626 scan lines, but generally has 625 scan lines. Thus, when the mode is set to 625 scan lines, the playback signal can be converted. As shown, the scanning line between the 525 scan line and the broadcasting method having the 625 scan line has a 5: 6 ratio. The NTSC having the 525 scan line is based on 5 lines, and the PAL having 625 lines has 6 lines. It is a standard.

FIG. 5 shows the conversion unit of the frame when controlling the conversion of the reproduction method based on the line unit as shown in FIG. 4. (A) When converting from NTSC having 525 scan lines to the PAL method having 625 scan lines. (B) shows the frame state when converting from PSL having 625 scan lines to NTSC having 525 scan lines.

6 is a flowchart illustrating a method for converting a control method by reproducing a recording and reading mode of the memory 512 of the reproduction method conversion control unit 510 of FIG. 2, wherein the first step is a reproduction method setting process. Steps 2 to 10 are a process of converting from a broadcast method having 525 scan lines to a broadcast method having 625 scan lines, and steps 11 to 22 are processes of converting a broadcast method having 525 scan lines from 625 scan lines.

The operation of the circuit diagrams shown in FIGS. 1 and 2 and 3 will now be described by the contents shown in FIGS.

First of all, the present invention converts a broadcasting method to be compatible between systems processed by different broadcasting methods using a scanning line of a video signal. That is, as described above, the television system is divided into NTSC, PAL, and SECAM systems worldwide. do. However, they can be largely classified into two through the scanning line. That is, 525 and 625 scan lines. Accordingly, the present invention provides a reproducing method conversion apparatus and method between 525 and 625 scan lines.

The luminance / color signal separator 501 separates the luminance signal and the color signal from the composite video signal output from the reproduction signal processing circuit 400 as described above, and the first and second A / D converters 502 and 503 are applied to the applied luminance signal and Each color signal is converted into a digital signal. The color signal demodulator 504 also demodulates the R, G, B digital color signals output from the second A / D converter 503 into R-Y, B-Y color difference signals.

As described above, the first mixer 505 is configured to convert the luminance signal output from the first A / D converter 502 and the color difference signal output from the color signal demodulator 504 into the form of Y + (RY) + (BY). The reproduction method is transferred to the reproduction reproduction unit 510. In this case, the first mixer 505 may be deleted and the luminance signal and the color difference signal applied to the reproduction mode conversion control unit 510 may be applied in parallel.

The sync signal separator 506 separates and outputs the vertical and horizontal sync signals from the brightness signal separately output from the brightness / color signal separator 501.

The synchronizing signal generator 507 for each reproducing method generates vertical and horizontal synchronizing signals for the case of 525 scan lines and the case of 625 scan lines according to the sync signal output from the sync signal separator 506, and thus the encoder 600. It applies to the 1st encoder 602 and the 2nd encoder 603 inside, respectively.

The reproduction method conversion control unit 500 converts the reproduction method of the signal output from the first mixer 505 according to the synchronization signal output from the synchronization signal separator 506 and the conversion mode setting control signal applied by the user's control. To control. That is, the address generator 511 uses the vertical and horizontal synchronization signals output from the synchronization signal separator 506 to write and read the address (W.ADD.R.ADD.) To the first and second input terminals of the memory 512. Occurs as I1, I2). As described above, the memory 512 can simultaneously record and read the dual port video RAM, and the luminance and color difference signals, which are applied from the first mixer 505 to the third input terminal I3, are transmitted from the address generator 511. W.ADD authorized. And R.ADD. To perform recording and reading.

The multiplexer 513 is a selection means for selectively outputting the signals output from the first mixer 505 and the memory 512 by the above-described conversion mode setting control signal. When the conversion to the reproduction method is unnecessary, the multiplexer 513 Select the output of 505 and select the output of the memory 512 if conversion is needed.

In more detail, when the conversion of the reproduction method is not necessary, the signal output from the luminance / color signal separation means 501 to the first mixer 505 is transmitted to the data separator 514 and the first to third through the multiplexer 513. It is output through the D / A converters 521 to 523 and the encoder 600.

However, when the system needs to be converted from NTSC to PAL (Step 1), first, the conversion mode setting playback signal applied by the user is applied to indicate the intention to convert and the NTSC / PAL control signal is applied to be set to the NTSC mode. . When the system is reset by the system control means (not illustrated), the address generator 511 sets the write address (W.ADD.) And the read address (R.ADD.) (Second step). . Then, it is checked whether the vertical synchronization signal V.SYNC is hidden among the signals applied from the synchronization signal separator 506 (step 3). The write and read addresses (W.ADD.R.ADD.) Remain set until the vertical synchronization signal is applied. When the vertical synchronization signal is detected, the address generator 511 writes a signal applied from the first mixer 505 to the third input terminal 3 of the memory 512 and read out to the first output terminal 01. And a read address (W.ADD.R.ADD.). Therefore, the recording and reading mode of the memory 512 is performed (fourth step). At this time, the address is counted up by one until the write address (W.ADD.) Specifies 525/2 scan lines and the read address (R.ADD) is designated 625/2 (step 5). Therefore, the address value is controlled in units of one field. When the write address (W.ADD) reaches 525/2 and the read address reaches 625/2 (steps 6 and 8), the address generator 511 is reset again (steps 7 and 9). In this case, the fourth to ninth steps are repeatedly performed (step 10).

Such recording and reading is recorded and reproduced in the same units as in FIG. That is, the write address (W.ADD) designated at the address 511 is specified such that a signal applied from the first mixer 505 is recorded from one scan line to five scan lines in one unit, and at the same time, the read address (R.ADD) As soon as one line of government is loaded into the memory 512, one line of information can be read out, and up to five lines are read as in the case of recording, and the recording address (W.ADD) is six lines as shown in FIG. When the information is specified to be recorded, the read address R.ADD specifies an address so that the information of five lines is read again. Thus, when reading based on 5 lines, 5 lines are read again and converted into 525 scanning lines. According to such scanning line control, the reproduction method is switched so that the information of the five frames is read out and displayed at the time when the information of the six frames is recorded as in the fifth (A).

On the other hand, in order to convert the information of the 625 scan line into the information of the 525 scan line, the address generator 511 is first reset as described above (step 11), and it is checked whether the vertical synchronization signal is applied (the first step). Step 12). When the vertical synchronization signal is applied from the synchronization signal separator (506), the output signal is first outputted from the write address (W.ADD) to cause the memory 512 to record an image signal applied from the first mixer 505 (step 13). ). At this time, address designation is counted up as described above (step 14). Contrary to the above, since there are more scanning lines for the applied video signal, the read address (R.ADD) is not specified at the same time, and the standby state until the recording address (W.ADD) specifies the scanning line of 525/2. (Step 15). When the write address W.ADD crosses the scanning line of 525/2, the write address W.ADD is specified and the read address R.ADD is also specified, and the memory 512 performs the read mode (16th). step). At this time, the read mode reads from one scan line of the recorded information. As can be seen from (B) of FIG. 5, the reading mode is read for 1/30 second. The recording address (W.ADD) is reset again when the 625/2 scan line is recorded, and the read address (R.ADD) is reset again when the 525/2 scan line is read (18th to 21th), that is, 1 /. After waiting for Article 30, the read address (R.ADD) reads by specifying the address in the form of skipping the scanning information of 6 lines and reading the information of 7 lines when 5 lines are read as shown in FIG. 5 frames are reproduced at the same time that information for 5 frames is applied. The read mode is repeatedly set during the above-described period in units of five frames of the video signal applied as described above. If the process continues in step 22, steps 16 to 21 are repeated.

The data separator 514 separates an image signal applied from the reproduction type conversion control unit 510 into a luminance signal and a color difference signal, and outputs the processed signal to the first to 3D / A converters 521 to 523 as described above.

When the luminance signal and the color difference signal output from the first to 3D / A converters 521 to 523 are applied to the encoder 600, the first encoder 602 or the NTSC / PAL playback signal is applied by the first selecting means 601. The application state to the second encoder 603 is selected. As described above, the first encoder 602 is an encoder dedicated to 525 scan lines and the second encoder 603 is an encoder dedicated to 626 scan lines. The second selection means 604 selectively outputs a signal applied by a reproduction signal such as the first selection means 601 to a display device (not illustrated). As described above, the present invention converts the reproduction method using the scanning line so that the reproduction signal of the recording and reproduction device can be reproduced according to the reproduction method of the display device, thereby making it compatible between the recording and reproduction device and the display device having different image processing methods. Can be done.

Claims (2)

A playback method conversion method for converting a playback signal of a camera-integrated video cassette recorder for recording and playing back a video signal applied from the camera according to a broadcast method, comprising: a camera as a video signal source, wherein the playback of the video cassette recorder is performed. A reproduction method setting process for setting a reproduction method of the reproduction signal according to the broadcast method employed in the display apparatus for outputting a signal; And adjusting the scan line by repeatedly reproducing the applied scan line one line for each first predetermined unit when the scan line of the reproduction signal output from the video cassette recorder is larger than the scan line of the display apparatus in the reproduction method setting process. A reproducing method comprising a first adjusting method and a second adjusting method for adjusting the scanning line by jumping one line for every second predetermined unit if the scanning line of the applied reproduction signal is smaller than the scanning line of the display device A playback method conversion method comprising a method conversion process. The method of claim 1, wherein the first predetermined unit and the second predetermined unit comprise the same unit.