JP2001157166A - Device for recording and reproducing digital video signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a transmission line in the internal processing of auxiliary data signals in a digital video/sound signal recording and reproducing device, which records and reproduces the auxiliary data signals accompanying digital video signals. SOLUTION: An auxiliary data detection conversion circuit 14 detects an auxiliary data signal from an input digital signal SI2 and makes the signal an intermediate type auxiliary data signal. A signal mixing circuit 13 superimposes the auxiliary data signal in a period, corresponding to the horizontal blanking period of a digital video main signal. In this way, because the internal signal S9 of a video signal and the internal signal S10 of the auxiliary data signal to be recorded can be made the same transmission signal S11, a transmission line where the auxiliary data signal is separately transmitted can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video signal recording / reproducing apparatus capable of recording and reproducing a video / audio signal and auxiliary data associated therewith.

[0002]

2. Description of the Related Art FIG. 5 shows a partial structure of a recording system signal processing in a conventional digital video / audio recording / reproducing apparatus capable of recording auxiliary data accompanying video / audio. This digital video / audio recording / reproducing apparatus detects an auxiliary data signal from a recording bit conversion circuit 1, an input buffer circuit 2, and a digital input signal for converting an input video signal applied as a digital video / audio signal input SI1 from 10 bits to 8 bits. Auxiliary data detection / conversion circuit 3 for processing such as conversion, recording video signal processing circuit 4 for processing video signals of the main system 4, auxiliary for converting the processed auxiliary data into a signal format for recording on a recording medium It is composed of a data formatter 5. The auxiliary data detection / conversion circuit 3 is arranged at the position shown in FIG. 5 because the auxiliary data detection / conversion processing is performed at the input section of the digital input signal in terms of signal processing. Note that audio signal processing is omitted here for the sake of simplicity.

[0003] Auxiliary data accompanying video and audio is often required in digital video and audio recording and reproducing apparatuses used for broadcasting services. In this case, the size of the signal processing circuit becomes large. 5, an input signal processing block A including digital input signal processing circuit sections 1, 2, 3 and a recording signal processing block B including signal processing sections 4, 5 at the subsequent stage are realized on separate printed circuit boards or the like. Thus, necessary signals may be transmitted between the printed circuit boards and the like. In such a case, as shown in FIG. 5, it is necessary to adopt a configuration in which the video signal S1 of the main system and the auxiliary data signal S2 are respectively transmitted by different systems.

FIG. 6 shows a partial structure of a reproduction signal processing in a conventional digital video / audio recording / reproducing apparatus capable of reproducing auxiliary data accompanying video / audio. This digital video / audio recording / reproducing apparatus performs a reproducing video signal processing circuit 6 for extracting a video signal from a reproducing signal SP1 reproduced from a recording medium and performing a reproducing process, extracting an auxiliary data signal from a reproducing signal from a recording medium, and the like. An auxiliary data unformatter 7, an output buffer circuit 8 for holding the output of the reproduced video signal, a reproducing system bit conversion circuit 9 for converting the reproduced video signal from 8 bits to 10 bits, and a reproduction of the reproduced auxiliary data signal into a digital output signal It comprises an auxiliary data reconstruction circuit 10 to be constructed and a signal mixing circuit M2.
The auxiliary data reconstructing circuit 10 is arranged at the position shown in FIG. 6 because the reconstruction processing of the auxiliary data is performed at the output section of the digital output signal in terms of signal processing.
Here too, audio signal processing is omitted for the sake of simplicity. Similar to the circuit configuration of the recording system in FIG. 5, when the reproduction signal processing block C and the output signal processing block D are realized on separate printed boards as shown in FIG. Video signal S5 and auxiliary data signal S6
Must be transmitted in different systems.

[0005]

In the above-mentioned conventional digital video / audio signal recording / reproducing apparatus having a function of recording / reproducing auxiliary data accompanying the video / audio signal, the input signal processing block A and the recording signal processing block B are provided. For example, when present on another printed circuit board, or when the reproduced signal processing block C and the output signal processing block D are present on another printed circuit board, the main system video signal and the auxiliary data signal are transmitted separately. However, there is a problem in that the miniaturization of the device is hindered. Also, a device having no auxiliary data recording / reproducing function may not have a transmission line for auxiliary data in S2 in FIG. 5 or S6 in FIG. In the case of addition, it is necessary to separately add a transmission line for the auxiliary data.

The present invention has been made in view of such a problem of the conventional digital video / audio signal recording / reproducing apparatus, and the transmission of the auxiliary data is performed by using the same transmission line as the main system video signal. It is an object of the present invention to realize a digital video / audio signal recording / reproducing apparatus having a function of recording / reproducing auxiliary data accompanying a video / audio signal.

[0007]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides an auxiliary data signal in a portion corresponding to a horizontal blanking period of video signal data after signal processing in a digital video signal input signal circuit block. Means for re-superimposing the intermediate-format auxiliary data signal after signal processing in the digital input signal circuit block of the digital input signal circuit block, so that the auxiliary data signal is also transmitted to the next signal processing circuit block only by the transmission line of the main system video signal. It is configured to be able to. Also, in the processing circuit of the reproducing system, an intermediate format auxiliary processing of auxiliary data reproduced from the recording medium is provided in a portion corresponding to a horizontal blanking period of a digital video signal obtained by processing the video signal reproduced from the recording medium. By superimposing the data signal, the auxiliary data signal can be transmitted to the digital signal output block of the video / audio signal of the next stage only by the transmission line of the reproduction system of the main system video signal.

In the above arrangement, the horizontal blanking period of the video signal on which the intermediate format auxiliary data signal is superimposed must be fixed at a fixed position before and after the transmission line. In addition to the above, a configuration may be adopted in which a 1-bit auxiliary data signal superposition position flag signal is added.

According to the first aspect of the present invention, a digital video signal having a function of receiving a digital video signal and recording auxiliary data superimposed on a blanking area of the digital video input signal on a recording medium simultaneously with the digital video signal is provided. In the signal recording / reproducing apparatus, an auxiliary data detection / conversion means for detecting an input auxiliary data signal included in the input digital video / audio signal and converting the same into an intermediate format auxiliary data signal, First mixing means for superimposing during the horizontal blanking period of the fixed line in the signal in the middle of the system video signal processing and transmitting the signal to the next signal processing circuit; and a video signal among superimposed signals obtained by the first mixing means. Recording video signal processing means for processing a signal as a recording signal, and the horizontal blanking signal from a signal obtained from the first mixing means. Recording data format means for re-extracting the intermediate format auxiliary data signal superimposed on the period and converting the intermediate format auxiliary data signal into a format for recording on the recording medium; and the auxiliary data signal converted by the recording data format means. And a second mixing means for mixing again with the video signal of the main system which has completed the signal processing to create a recording signal.

This has the effect that the data signal of the main system video signal and the auxiliary data signal of the intermediate format can be transmitted on the same transmission line.

According to a second aspect of the present invention, in the digital video signal recording / reproducing apparatus of the first aspect, the auxiliary data detecting and converting means converts input auxiliary data detected from the digital video signal into an auxiliary data signal of an intermediate format. Along with
When superimposed again in the horizontal blanking period in the middle of the main system video signal processing, a 1-bit flag signal indicating the superimposed position is transmitted to the recording data format means.

Thus, the data signal of the video signal of the main system and the auxiliary data signal of the intermediate format can be transmitted on the same transmission line, and the position of the horizontal blanking period in which the auxiliary data signal of the intermediate format is superimposed can be set freely. It has the action of:

According to a third aspect of the present invention, a digital video signal is input, auxiliary data superimposed on a blanking area of the digital video input signal is recorded on a recording medium simultaneously with the digital video signal, and a video and audio signal is recorded. A digital video signal recording / reproducing apparatus for reproducing auxiliary data from a recording medium, auxiliary data unformatting means for detecting auxiliary data from the reproduction data read from the recording medium, and converting the auxiliary data into intermediate format auxiliary data; and Playback video signal processing means for performing a playback process of a video signal of the playback data read out from the storage device; and an auxiliary data signal of the intermediate format after the extraction process is again subjected to a horizontal line of a fixed line in a signal in the middle of the main system video signal process. First mixing means for superimposing on the ranking period and transmitting to the next signal processing;
Auxiliary data reconstructing means for extracting the auxiliary data signal of the intermediate format superimposed in the horizontal blanking period again and converting it into a standard signal of a desired digital interface, and digitally outputting the auxiliary data reconstructed by the auxiliary data reconstructing means And a second mixing means for re-superimposing on the signal.

This has the effect that the data signal of the main system video signal and the auxiliary data signal of the intermediate format during reproduction can be transmitted on the same transmission line.

According to a fourth aspect of the present invention, in the digital video signal recording / reproducing apparatus according to the third aspect, the auxiliary data unformatting means performs an intermediate format auxiliary data signal which has been extracted from a reproduction signal on a recording medium. Transmitting a 1-bit flag indicating a superimposition position to be superimposed on a signal in the middle of main system video signal processing to the next-stage auxiliary data reconstructing means when transmitting to the next-stage signal processing It is.

Thus, the data signal of the video signal of the main system during reproduction and the auxiliary data signal of the intermediate format can be transmitted on the same transmission line, and the position of the horizontal blanking period for superimposing the auxiliary data signal of the intermediate format can be freely set. Has the effect that it can be set to

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 shows a part of a recording system signal processing of a video / audio recording / reproducing apparatus capable of recording / reproducing auxiliary data accompanying a video / audio signal according to the present invention. The input signal processing block A1 includes a recording bit conversion circuit 11, an input buffer circuit 12, a signal mixing circuit 13, and an auxiliary data detection conversion circuit 14. Also, recording signal processing block B
1 includes a recording video signal processing circuit 15, an auxiliary data formatter 16, and a signal mixing circuit 17. Hereinafter, the operation of each circuit will be described in detail.

In FIG. 1, an input digital video / audio signal S
I2 is converted from a 10-bit digital signal into a 8-bit 1-word video signal used in internal processing by a recording bit conversion circuit 11 as a main-system video signal processing, passes through an input buffer circuit 12, and passes through an internal signal S9. Becomes Since the internal signal S9 has a signal required only in a period corresponding to the effective area of the video signal other than the horizontal blanking period, the period corresponding to the horizontal blanking period can be used freely. On the other hand, the auxiliary data detection conversion circuit 14
Auxiliary data to be recorded is detected and extracted from the auxiliary data signal inserted in the vertical or horizontal blanking period of the digital input signal of 10 bits per word, and the auxiliary data of an intermediate format of 8 bits per word used in internal processing. The data internal signal S10 is created. Here, the signal mixing circuit 13 creates a signal S11 in which the auxiliary data internal signal S10 is superimposed during a period corresponding to the horizontal blanking of the internal signal S9 of the video signal. This makes it possible to transmit only the signal S11 to the next-stage recording signal processing block B1.

In the recording signal processing block B1 at the next stage, the video signal is subjected to processing such as data compression by the recording video signal processing circuit 15 of the main system, and is converted again into the internal signal S12 of the video signal. The signal S11 is also input to the auxiliary data formatter 16. The auxiliary data formatter 16 extracts again the auxiliary data signal necessary for recording superimposed during a period corresponding to the horizontal blanking of the video signal, converts the auxiliary data signal into a signal format for recording on a recording medium, and outputs a signal S13. is there. The signal S12 and the signal S13 are mixed by the signal mixing circuit 17 to obtain a signal SR2 to be recorded on a recording medium.

(Embodiment 2) Next, Embodiment 2 will be described. FIG. 2 shows a part of a recording signal processing of a video / audio recording / reproducing apparatus capable of recording / reproducing auxiliary data accompanying a video / audio signal according to the present invention. In this figure,
The same parts as those of the video / audio recording / reproducing apparatus according to the first embodiment are denoted by the same reference numerals, and detailed description is omitted. In this embodiment, the auxiliary data detection / conversion circuit 19 is replaced by the auxiliary data detection / conversion circuit 19 instead of the auxiliary data detection / conversion circuit 14.
6, an auxiliary data formatter 20 is used. Similar to the auxiliary data detection / conversion circuit 14, the auxiliary data detection / conversion circuit 19 outputs the auxiliary data signal S10 of the intermediate format during a period corresponding to the horizontal blanking of the video signal processing signal S14 of the main system. Further, a 1-bit signal S16 indicating that the auxiliary data signal is superimposed is transmitted to the auxiliary data formatter 20. When the auxiliary data formatter 16 which is the next stage of the auxiliary data signal processing circuit in the first embodiment not specified what the horizontal blanking period intermediate format of the auxiliary data is superimposed in advance, the extraction process of the auxiliary data It may not be possible. Therefore, in the second embodiment, a 1-bit signal line S16 is added to improve this. For example, in the horizontal blanking period in which the intermediate format auxiliary data signal is superimposed, S16
Is High level and Low level in other periods, the auxiliary data formatter 20 determines that S16 is High.
Processing can be performed only during the gh level period. As described above, in the second embodiment, the position of the period corresponding to the horizontal blanking in which the intermediate format auxiliary data signal is superimposed can be easily determined by the additional 1-bit signal line, or the superimposed horizontal blanking can be easily determined. The position of the ranking period has a degree of freedom.

(Embodiment 3) FIG. 3 shows a part of a reproduction system signal processing section of a video / audio recording / reproducing apparatus capable of recording / reproducing auxiliary data accompanying a video / audio signal according to the present invention. The reproduction signal processing system includes a reproduction signal processing block C1 including a reproduction video signal processing circuit 21, a signal mixing circuit 22, and an auxiliary data unformatter 23, an output buffer circuit 24, a reproduction system bit conversion circuit 25, a signal mixing circuit, as shown in FIG. 26 and an output signal processing block D1 including an auxiliary data reconstruction circuit 27.

Next, the operation of each block will be described.
In FIG. 3, the video signal SP2 reproduced from the recording medium
Is processed by the reproduced video signal processing circuit 21 of the main system to become an internal signal S20 of the reproduced video signal. On the other hand, the auxiliary data unformatter 23 reproduces the auxiliary data signal from the reproduction signal SP2 from the recording medium, and converts the signal in the recording format of the recording medium into the reproduction signal S21 of the intermediate format auxiliary data. Then, the auxiliary data reproduction signal S21 of the intermediate format is generated by the signal mixing circuit 22 during a period corresponding to the horizontal blanking of the reproduction video signal S20 of the main system.
Are superimposed to generate a transmission signal S22 to the next-stage output signal processing block D1. This makes it possible to transmit only the signal S22 to the next-stage output signal processing block D1.

In the output signal processing block D1, the video signal of the main system is buffered through the output buffer circuit 24, and then is converted from a signal of 8 bits per word to a signal of 10 bits per word by a reproduction system bit conversion circuit 25. And converted to a signal S23. On the other hand, auxiliary data reconstruction circuit 27
Creates an auxiliary data signal S24 converted into a format of an output digital video / audio signal from a reproduction signal of the intermediate format auxiliary data superimposed on a period corresponding to the horizontal blanking period of the transmission signal S22. Then, the video signal S23 of the main system and the auxiliary data signal S24 are mixed by the signal mixing circuit 26, so that the reproduced digital signal SO2
Can be obtained.

(Embodiment 4) Next, Embodiment 4 will be described. FIG. 4 shows a part of the reproduction system signal processing of a video / audio recording / reproducing apparatus capable of recording / reproducing auxiliary data accompanying the video / audio signal according to the present invention. In this embodiment, the same portions as those of the third embodiment are denoted by the same reference numerals, and detailed description is omitted. In the reproduction signal processing block C2, an auxiliary data unformatter 29 is used instead of the above-described auxiliary data unformatter 23, and in the output signal processing block D2, an auxiliary data reconstruction circuit 30 is used instead of the auxiliary data reconstruction circuit 27. I have.

In the third embodiment, as described above, the intermediate format auxiliary data reproduction signal S21 is superimposed on the period corresponding to the horizontal blanking of the video signal processing signal S20 of the main system, and the transmission signal S22 is transmitted to the next circuit. Transmit to the block. In However Embodiment 3, in order to the extraction process of the auxiliary data, the next stage of the auxiliary data signal processing circuit auxiliary data restructuring circuit 27 is, intermediate format of the auxiliary data is superimposed on the advance which the horizontal blanking period Must be specified.

In the fourth embodiment, a 1-bit signal line S27 is added to improve this. For example, if S27 is set to the high level in the horizontal blanking period in which the intermediate format auxiliary data reproduction signal is superimposed, and the low level is set in the other periods, the auxiliary data reconstructing circuit 30 performs processing only during the period when the S27 is at the high level. Can be. As described above, in the fourth embodiment, the position of the period corresponding to the horizontal blanking in which the auxiliary data reproduction signal of the intermediate format is superimposed can be easily determined by the additional 1-bit signal line, or the superimposed horizontal data can be easily determined. The position of the blanking period has a degree of freedom.

In the above description, a video / audio recording / reproducing apparatus which converts a 10-bit digital input signal into 8 bits and records the data has been described. Other devices that handle digital input signals can be similarly implemented.

[0028]

As described above, according to the present invention, when recording / reproducing auxiliary data accompanying video / audio signals, signal transmission between internal signal processing blocks is performed only by the main system video signal transmission line. Alternatively, an advantageous effect can be obtained that can be realized only by adding a 1-bit signal.

[Brief description of the drawings]

FIG. 1 is a block diagram of a part of a recording system of a digital video / audio signal recording / reproducing apparatus capable of recording auxiliary data accompanying video / audio signals according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram of a part of a recording system of a digital video / audio signal recording / reproducing apparatus capable of recording auxiliary data accompanying video / audio signals according to Embodiment 2 of the present invention.

FIG. 3 is a block diagram of a part of a reproduction system of a digital video / audio signal recording / reproduction device capable of recording auxiliary data accompanying video / audio signals according to Embodiment 3 of the present invention.

FIG. 4 is a block diagram of a part of a reproduction system of a digital video / audio signal recording / reproduction device capable of recording auxiliary data accompanying video / audio signals according to Embodiment 4 of the present invention.

FIG. 5 is a block diagram of a part of a recording system of a conventional digital video / audio signal recording / reproducing apparatus capable of recording auxiliary data accompanying video / audio signals.

FIG. 6 is a block diagram of a part of a reproduction system of a conventional digital video / audio signal recording / reproduction device capable of recording auxiliary data accompanying video / audio signals.

[Explanation of symbols]

 1,11 Recording system bit conversion circuit 2,12 Input buffer circuit 3,14,19 Auxiliary data detection and bit conversion circuit 4,15 Recording video signal processing circuit 5,16,20 Auxiliary data formatter 6,21 Reproduction video signal processing circuit 7, 23, 29 Auxiliary data unformatter circuit 8, 24 Output buffer circuit 9, 25 Reproduction system bit conversion circuit 10, 27, 30 Auxiliary data reconstruction circuit 13, 17, 22, 26, M1, M2 Signal mixing circuit SI1, SI2 input digital video / audio signal SO1, SO2 output digital video / audio signal S1, S9 recording system internal intermediate format video data signal S2, S10 recording system internal intermediate format auxiliary data signal S3, S12 video signal after recording signal processing S4 S13 Auxiliary data signal after recording signal processing SR1, SR2 Recording signal to recording medium SP1, SP2 Playback signal from recording medium S5, S20 Playback system internal intermediate format video data signal S6, S21 Playback system internal intermediate format auxiliary data signal S7, S23 Playback video signal after playback bit conversion S8, S24, S30 playback Auxiliary data signal after reconstruction S11 Recording system video signal internal signal after auxiliary data re-superposition S16 Recording system auxiliary data superposition position flag signal S22 Reproduction system video signal internal signal after auxiliary data superposition S27 Reproduction system auxiliary data superposition position flag signal A, A1, A2 Input signal processing block B, B1, B2 Recording signal processing block C, C1, C2 Reproduction signal processing block D, D1, D2 Output signal processing block

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 7/083 7/084 7/085 F term (reference) 5C053 GB05 JA21 JA30 KA26 5C063 AB03 AB07 CA34 DA13 DA20 DB03 5D044 AB07 BC01 CC03 DE27 DE33 DE57 EF05 FG18 GK12 5D080 BA03 BA08 CA03 DA04 EA02 FA01 FA51 GA23 GA25

Claims (4)

[Claims] 1. A digital video signal recording and reproducing apparatus having a function of receiving a digital video signal and recording auxiliary data superimposed on a blanking area of the digital video input signal on a recording medium simultaneously with the digital video signal. Auxiliary data detection and conversion means for detecting an input auxiliary data signal included in the converted digital video / audio signal, and converting the auxiliary data signal into an intermediate format auxiliary data signal; A first mixing unit that superimposes a signal in a horizontal blanking period of a fixed line and transmits the signal to a next-stage signal processing circuit; and a recording unit that processes a video signal as a recording signal among superimposed signals obtained by the first mixing unit. A video signal processing unit, and a signal obtained from the signal obtained by the first mixing unit, which is superimposed on the horizontal blanking period. Recording data format means for extracting the auxiliary data signal of the format again and converting the auxiliary data signal of the intermediate format into a format for recording on a recording medium; and completing the signal processing of the auxiliary data signal converted by the recording data format means. 2. A digital video / audio signal recording / reproducing apparatus, comprising: second mixing means for remixing with a video signal of a main system to create a recording signal. 2. The auxiliary data detecting and converting means converts input auxiliary data detected from a digital video signal into an auxiliary data signal of an intermediate format, and also superimposes it again in a horizontal blanking period in the middle of main system video signal processing. 2. The digital video signal recording / reproducing apparatus according to claim 1, wherein a 1-bit flag signal indicating a superposition position is transmitted to said recording data formatting means. 3. A digital video signal is input, auxiliary data superimposed on a blanking area of the digital video input signal is recorded on a recording medium simultaneously with the digital video signal, and a video / audio signal and auxiliary data are recorded from the recording medium. In a digital video signal recording / reproducing apparatus for reproducing, auxiliary data unformatting means for detecting auxiliary data from the reproduced data read from the recording medium and converting the auxiliary data into intermediate format auxiliary data; Playback video signal processing means for performing the playback process of the video signal of the above, the intermediate format auxiliary data signal after the extraction process is again superimposed on the fixed line horizontal blanking period in the signal in the middle of the main system video signal processing, and A first mixing means for transmitting to the signal processing of the stage, and an intermediate superimposed on the horizontal blanking period Auxiliary data reconstructing means for extracting the auxiliary data signal of the formula again and converting it into a standard signal of a desired digital interface, and a second mixing for re-superimposing the auxiliary data reconstructed by the auxiliary data reconstructing means on the digital output signal Means for recording and reproducing digital video signals. 4. The auxiliary data unformatting means, when transmitting an intermediate format auxiliary data signal, which has been extracted from a reproduction signal on a recording medium, to a signal processing at a next stage, performs processing during the main system video signal processing. 4. The digital video signal recording / reproducing apparatus according to claim 3, wherein a 1-bit flag indicating a superimposition position to be superimposed on the signal is transmitted to the auxiliary data reconstructing means at the next stage.