JPH07282567A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To manage recorded date and time information of original data and dubbing data with an MIC by providing an area in which information discriminating whether data recorded on a tape are data made by a dubbing or not are stored in a record date and time pack. CONSTITUTION:The data structure of a memory IC (an MIC) is divided into a main area and an optional area, all of the MIC is stated with pack structures except a leading one byte and an unused area (an FFh). Only character data are stored with the pack structure of a variable length and others are stored with the pack structure of the fixed length of 5 bytes. The optional area is consisting of optional events. In the recorded date and time pack, a pack is stipulated as the recorded date and time pack when the header written in a PC0 is 01000010. An RH (a recording mode) is recorded in upper two bits of a PC1. The RM is used when data are recorded and recording forms of only a video data, only a audio data. video and audio data and a duplicated data are expressed respectively with the values 00, 01, 10 and 11. The procession of a cassette with the MIC is processed by a microcomputer with the MIC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital VCR for encoding and recording and reproducing video signals and audio signals.
And a recording / reproducing apparatus such as

[0002]

2. Description of the Related Art Apparatuses for encoding and recording video signals and audio signals for recording and reproducing have been implemented. As an example of this, a component type D1 in a commercial VCR,
There is a composite method such as D2. Also, as a consumer digital VCR, an image compression type has been researched and developed. By the way, it is considered to attach a memory IC to a tape cassette used for a digital VCR. This memory IC will be referred to as MI in the following description.
It is called C (Memory In Cassette). MIC is
It is divided into a main area and an optional area,
The data is stored using the packed structure. The information unit of the MIC is called an event, and includes a text event, a program event, an index event (tag), a maker's optional event, and the like. A main event is stored in the main area of the MIC, and all VCRs must deal with this area without fail. In addition, an optional event is stored in the optional area. Optional events begin with the event header.

[0003]

In such a system, a pack called a recording date / time pack is prepared in order to manage the date information and the time information of the event generated in the digital VCR by the MIC. In the recording date / time pack, the date and time when the video data and the audio data are recorded on the tape are recorded in binary numbers. When dubbing is performed from a tape on which such data is recorded (referred to as a first tape) to a blank tape (referred to as a second tape), the recording date / time pack of the first tape is the second tape. However, the recording date and time pack of the date and time when the dubbing is performed is not recorded on the second tape. Therefore, the MIC cannot manage the data when dubbing is performed.

Therefore, the object of the present invention was made in view of the above-mentioned problems, and both the date / time information of the original data and the date / time information at the time of dubbing are provided. It is to provide a recording / reproducing device that can be managed by MIC.

[0005]

According to the present invention, in a recording / reproducing apparatus for recording / reproducing using a recording medium having a memory mounted therein, an area for recording auxiliary data related to video data and audio data is recorded in the memory. Is provided, time information at the time of recording the first video data and / or audio data already recorded on the recording medium is written in a predetermined area of the memory, and the second information newly recorded on the recording medium is provided. The recording / reproducing apparatus is characterized in that the time information when the video data and / or the audio data is recorded is written in a predetermined area of the memory.

[0006]

In the recording date / time pack, an area for storing data for determining whether or not the recording on the tape is by dubbing is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. In the following embodiments, the present invention is applied to a digital VCR which records / reproduces by compressing a digital video signal. Such a digital V
In CR, the composite digital color video signal is separated into a luminance signal Y, color difference signals RY and BY, and D
It is compressed by a high-efficiency compression method using a high-efficiency code using CT conversion and variable-length code, and recorded on a magnetic tape by a rotary head. The recording method is the SD method (525
Line / 60 Hz, 625 lines / 50 Hz) and HD system (1125 lines / 60 Hz, 1250 lines / 50)
, And the number of tracks per frame is 10 tracks (525 lines / 6
0 Hz) or 12 tracks (525 lines /
In the case of 60 Hz), in the HD system, the number of tracks per frame is double that in the SD system, that is, 20 tracks (in the case of 1125 lines / 60 Hz) or 24 tracks (in the case of 1250 lines / 50 Hz). .

[0008] In such a digital VCR, the applicant of the present application has previously proposed an application ID as a system for making data management easy and making the digital VCR usable as a versatile recording / reproducing apparatus.
We are proposing a system that With this system, video auxiliary data VAUX (Video Auxiliary da
ta), audio auxiliary data AAUX (Audio Auxili
It becomes easy to manage a cassette with a memory having a memory called ary data), a sub code, and a MIC. Further, according to the present invention, information for determining whether or not the data is due to dubbing is recorded in the recording date / time pack.

First, this Application ID
Describe the system. In a digital VCR tape to which the present invention is applied, diagonal tracks are formed on the tape as shown in FIG. 1A. The number of tracks per frame is 10 and 12 tracks in the SD system and 20 and 24 tracks in the HD system.

FIG. 1B shows one track of tape used in a digital VCR. At the truck entrance side,
There is a timing block for surely performing post-recording called ITI (Insert and Track Information). This is provided in order to accurately position the area when the data written in the subsequent area is post-recorded and rewritten.

In any digital signal recording / reproducing application apparatus, since rewriting of data in a specific area is essential, this ITI area at the track entrance side must exist. That is, a large number of sync blocks having a short sync length are written in the area called ITI, and the sync numbers are assigned in order from the track entrance side. When trying to post-record, if any of the sync blocks in this ITI area can be detected, the current position on the track can be accurately determined from the number written there. Based on this, the post-recording area is determined. Typically,
On the track entrance side, it is difficult to hit the head due to mechanical precision and the like, and it is unstable. Therefore, the detection probability is increased by shortening the sync length and writing a large number of sync blocks.

Further, in the above-mentioned apparatus, the applicant of the present invention previously mounted a circuit board provided with an MIC on a cassette for accommodating a recording medium, and when this cassette was mounted on the apparatus, it was written in this memory IC. It has been proposed that the recorded data be read to assist recording / reproduction (Japanese Patent Application No. 4-165444 and Japanese Patent Application No. 4-287875).

The MIC contains information about the tape itself such as tape length, tape thickness, tape type, etc., as well as TOC (Table Of C
ontents) information, index information, character information, reproduction control information, timer recording information, etc. can be stored. Digital cassette tape with MIC
When it is connected to, for example, the data stored in the MIC is read out, and a still image (photo) is reproduced by skipping to a predetermined program, setting the reproduction order of the program, designating a scene of the predetermined program. It is also possible to record with a timer reservation.

By the way, the ITI on the entrance side of the truck
Data called APT (Application of a Track) is written in the area. APT is data that defines the structure of the track.

For example, when APT = 000, AAU
The X, VAUX, subcode, and MIC areas are all described in a common pack structure. As shown in FIG. 2, one pack is composed of 5 bytes, the first 1 byte is a header, and the remaining 4 bytes are data. A pack is a minimum unit of a data group, and one pack is formed by collecting related data.

The 8 bits of the header are divided into upper 4 bits and lower 4 bits to form a hierarchical structure. As shown in FIG. 3, the upper 4 bits are used as an upper header and the lower 4 bits are used as a lower header to form two layers. Further, by bit assignment of data, it is possible to extend to a layer below it.
Due to this layering, the contents of the pack are clearly systematized, and its expansion is easy. And this upper header,
The space of 256 by the lower order header is prepared as a pack header table together with the contents of each pack (see FIG. 4). Each area described above is described using this. The pack structure is basically a fixed length of 5 bytes, but as an exception, a variable length pack structure is used only when character data is described in the MIC. This is to effectively use the limited buffer memory.

FIG. 5 shows A in the audio sync block.
9 is a diagram in which 9 packs of AUX-dedicated syncs are extracted and described in the track direction. One video frame is composed of 10 tracks in the case of a 525 line / 60 Hz system and 12 tracks in the case of a 625 line / 50 Hz system. Audio and subcode are also recorded and reproduced according to this one video frame. In FIG. 5, numerals from 50 to 55 indicate pack header values (hexadecimal number). As can be seen from FIG. 5, the same pack is written 10 times on 10 tracks.
This part is called the main area. Essential items such as the sampling frequency and the number of quantization bits necessary for reproducing the audio signal are mainly stored in this area. It is written many times to protect data. This allows
The data in the main area can be reproduced even if the lateral scratches and one-sided channel clogs that often occur on tape transport occur.

The remaining packs other than that are all connected in order and used as an optional area. In FIG. 5, as shown in a, b, c, d, e, f, g, h, ..., the packs in the main area are pulled out and connected in the direction of the arrow. In one video frame, 30 packs (525 lines / 60 Hz) or 36 packs (625 lines / 50 Hz) of optional areas are prepared. This area is literally optional, so each digital VCR
Each time, a pack may be freely selected and described from the pack header table of FIG.

The optional area consists of common common options (for example, character data) and non-common maker's options whose contents can be independently decided by each maker. Since it is optional, only one or both may be present or both may not be present. If you do not have the information,
It is described using a pack without information (NO INFO pack). Application ID, both areas are separated by the appearance of the manufacturer code pack. The maker's optional area is after this pack.
The structure of the main area, optional area, common option, and maker's option is AAUX,
It is common to VAUX, subcode, and MIC.

FIG. 6 is a diagram showing a case where 45 packs of VAUX-dedicated sinks are extracted and described in the track direction. In FIG. 6, the numbers from 60 to 65 indicate pack header values (hexadecimal numbers). This is the main area. Like audio, I write the same pack 10 times on 10 tracks. Essential items such as a television system and a screen aspect ratio necessary for reproducing a video signal are mainly stored here. This allows
The data in the main area can be reproduced even for lateral scratches and one-channel clogs that are often found in tape transport. All other remaining packs are connected in order and used as an optional area. In the same manner as the audio in FIG. 6, the packs in the main area are pulled out and connected in the directions of the arrows, like a, b, c, .... One video frame has 390 packs (525 lines / 60Hz) or 4 optional areas.
68 packs (625 lines / 50 Hz) are prepared. The handling of the optional area is the same as that of audio.

FIG. 7 shows the data structure of the MIC. MI
The C area is also divided into a main area and an optional area, and all are described in a pack structure except for the first byte and an unused area (FFh). As described above, only the character data has a variable-length pack structure, and other than that, VAUX,
It is stored in a fixed-length pack structure of 5 bytes, which is the same as AAUX and subcode.

At the top address 0 of the MIC main area, the MIC Application ID, APM3
There are 4 bits and BCID (Basic Cassette ID). The BCID is a basic cassette ID and has the same content as an ID board for ID recognition (tape thickness, tape type, tape grade) in a cassette without MIC. The ID board makes the MIC reading terminal have the same function as the conventional 8 mm VCR recognition hole, which eliminates the need to make a hole in the cassette half as in the conventional case. After address 1, three packs of a cassette ID, a tape length, and a title end are sequentially inserted. The cassette ID pack has a more specific value of the tape thickness and memory information about the MIC.

In the tape length pack, the tape manufacturer stores the tape length of the cassette in terms of the number of tracks, and from this and the next title end pack (recording final position information, recording with absolute track number), the remaining tape is recorded. The amount can be calculated at once. Further, this recording last position information provides a convenient usability when the camcorder is used to reproduce and stop the recording, and then return to the original last recording position or when the timer is reserved.

The optional area is composed of optional events. Main area has addresses 0 to 1
While the fixed area of 16 bytes up to 5, the optional area is a variable-length area at address 16 and thereafter. The length of the area changes depending on the content, and when the event is erased, the remaining events are packed and stored in the address 16 direction. FFh is written in all the data that is no longer needed after the packing operation and is set as an unused area. The optional area is literally an option, and mainly stores the TOC and tag information indicating points on the tape, and character information such as a title regarding the program. MIC
At the time of reading, the next pack header appears every 5 bytes or every variable length byte (character data) depending on the contents of the pack header, but when FFh of the unused area is read as a header, this is the pack of the NOINFO pack. Since it corresponds to the header, the control microcomputer can detect that there is no information after that.

FIG. 8 is a diagram of a recording date / time pack used for managing the event generated in the digital VCR by the MIC. The header written on PC0 is "0
When it is "1000010", it is defined as a recording date pack.
RM (Recording Mode) is recorded in the upper 2 bits of PC1. The RM is used when data is recorded. RM has a value of "00" and only video data,
“01” represents only audio data, “10” represents video data and audio data, and “11” represents a recording form of duplication.

In the remaining 6 bits of the PC 1, "minute" at the time of recording is recorded. This value is 00-3B (h)
No information is available at 3F (h). In the upper 3 bits of PC2, the "day of the week" when recording is performed is recorded. This value is 0 (h) and Sunday is 1
Monday at (h), Tuesday at 2 (h), Wednesday at 3 (h), Thursday at 4 (h), Friday at 5 (h), 6
(H) indicates Saturday, and 7 (h) indicates no information. "Hour" at the time of recording is recorded in the remaining 5 bits of PC2. This value is any of 00 to 17 (h), and 1F (h) indicates no information. The "year" when recording is performed across the upper 3 bits of PC3 and the upper 4 bits of PC4 is recorded. This value is 00-63
It is any of (h), and there is no information at 7F. The “year” is represented by the lower two digits of the Christian era. In the remaining 5 bits of PC3, the "day" at the time of recording is recorded. This value is one of 01 to 1F (h). PC4
In the remaining 4 bits, the "month" when the recording was performed is recorded. This value is one of 1 to C (h), and F indicates no information.

The dubbing will be described below with reference to FIGS. 9 and 10. FIG. 9 is a diagram showing the program start / end points when recording is performed on the tape. Further, FIG. 10 is a diagram showing a pack array in the MIC when recording is performed on the tape. As shown in FIG. 9, a program start pack and a program end pack are used to record the start position and end position of each video data and audio data. The pack arrangement in the MIC corresponding to the tape recorded as shown in FIG.
As shown in FIG. 10A. That is, this pack array is stored in the MIC in the order of a program start pack indicating a start point and an end point of the program on the tape, a program end pack, and a recording date pack indicating the time when this recording is performed. As described above, the date / time information is recorded in the recording date / time pack, and the RM indicating which data is recorded is also recorded. in this case,
Since both video data and audio data are recorded, RM = “10” is recorded.

The pack arrangement in the MIC when the tape thus recorded is dubbed is shown in FIG. 10B. The pack array at this time is stored in the MIC in the order of a program start pack indicating the start point and end point of the program on the tape, a program end pack, a recording date / time pack of the original tape, and a recording date / time pack at the time of dubbing. To be done. That is, in this case, in addition to the pack arrangement in the MIC shown in FIG. 10A, the recording date / time pack at the time of dubbing is stored. The value of RM in the recording date pack at the time of dubbing is “11”. This is RM =
This is because "11" represents duplication. As a result, both the date / time information when the original video data and the audio data were recorded and the date / time information at the time of dubbing can be managed by the MIC.

Data insertion will be described below with reference to FIGS. 11 and 12. FIG. 11 is a diagram showing insert start / end points when data is inserted on the tape. It should be noted that VAUX Start Pack and VAUX End Pack are used for video data insertion, and A for audio data insertion (post-recording).
An AUX start pack and an AAUX end pack are used respectively. FIG. 12 is a diagram showing the pack arrangement in the MIC when the insert is performed on the tape. More specifically, FIG. 12A shows a pack array when video data is inserted, and FIG. 12B shows a pack array when audio data is post-recorded. Also, FIG. 12C shows a pack array of packs of post-recorded audio data and packs representing channel information of post-recorded audio data.

When the video data is inserted, as shown in FIG. 12A, VAUX start pack, VAUX end pack, and recording date / time pack are M in order.
It is stored in the IC. Similar to the above, the recording date / time pack records date / time information at the time of recording.
Further, in this case, since only the video data is inserted, the RM value of the recording date / time pack is set to "00". Next, when the audio data is post-recorded, as shown in FIG.
2A, AAUX Start Pack, AA
The UX end pack and the recording date and time pack are stored in the MIC in this order. Since the audio data only is post-recording, the RM value of the recording date / time pack is “01”.

An AAUX source control pack is used to record channel information of post-recorded audio data. That is, as shown in FIG. 12C, the AAUX start pack, the AAUX end pack, the recording date pack, and the AAUX source control pack are stored in the MIC in this order. The channel information of the post-recording audio data is stored in the AAUX source control pack.

Hereinafter, the AAUX source control pack will be described in detail with reference to FIG. This pack is P
When the header written in C0 is "0101001", it is defined as an AAUX source control pack. PC
All 1 are reserved. On the PC 2, the recording start flag, recording end flag, recording mode data, and insert channel data are recorded in this order from the MSB. The insert channel data makes it possible to know which channel the data was inserted into. If the insert channel is "000", channel 1 is "001", channel 2 is "010", channel 3 is "01".
1 "for channel 4," 100 "for channel 1 and channel 2," 101 "for channel 3 and 4 and" 110 "for channel 1 to channel 4.
, And "111" represents no information. The direction flag DRF and speed data are recorded on the PC 3. When the direction flag DRF is 0, it indicates the reverse direction, and when it is 1, it indicates the forward direction. Genre category data is recorded on the PC 4. Genre category data is AAU
It shows the genre of the source of X data.

As described above, by recording the channel information of the post-recorded audio data in the insert channel data of the AAUX source control pack, it is possible to know which channel has been post-recorded.

FIG. 14 and FIG. 15 are diagrams showing the pack arrangement according to the difference in priority data. Video data, channel 1 audio data, and channel 2 audio data are recorded on the tape shown in FIG. 15A shows a pack array when video data has priority, FIG. 15B shows a pack array when audio data recorded on channel 1 has priority, and FIG. 15C shows audio data recorded on channel 2. Pack arrangements in the case of prioritizing are shown respectively.

In FIG. 15A, the start point and end point of video data are stored in a program start pack and a program end pack. Along with this, a recording date / time pack is used to represent the date / time information of the recorded video data. The RM of this recording date / time pack is set to “00” (only video data). This allows the recorded video data to be defined as a program event.

By the way, in the case of giving priority to the audio data of the channel 1, for example, in the case of recording only the audio data first and then inserting the video data afterwards, such as VOS (Video On Sound), the video data is inserted. The TOC information formed by paying attention to the division of audio data rather than data may be required. At this time,
The start and end points of the audio data of interest are stored in the program start pack and program end pack, and the RM in the recording date / time pack is set to "01" to clearly program the audio data recorded in the audio area. It can be defined as an event.

That is, in FIG. 15B, the start point and the end point of the audio data are stored in the program start pack and the program end pack. Also, in order to represent the date / time information of the recorded audio data,
Recording date pack is used. The RM of this recording date / time pack is set to "01" (only audio data). Thus, the recorded audio data can be defined as a program event. Further, the AAUX source control pack is used subsequent to the recording date / time pack. The value of the insert channel in this pack is "000" (channel 1).
As a result, audio data can be defined as a program event in units of channels (channel 1).

Further, in FIG. 15C, similarly to FIG. 15B, the start point and the end point of the audio data are stored in the program start pack and the program end pack, and the date / time information of the recorded audio data is represented. Therefore, the recording date / time pack is used.
The RM of this recording date / time pack is set to "01" (only audio data). Thus, the recorded audio data can be defined as a program event. Similarly to FIG. 15B, the AAUX source control pack is used after the recording date / time pack. The value of the insert channel in this pack is "00
1 "(channel 2). As a result, the audio data can be defined as a program event in units of channels (channel 2).

FIGS. 16, 17, and 18 are block diagrams of a digital VCR to which the present invention is applied. In this digital VCR, a composite color video signal is separated into a digital luminance signal Y, color difference signals RY and BY, and compressed and recorded by a high efficiency coding method using DCT conversion and variable length coding. And the above M
Data of the V blanking period is recorded using an IC.

In FIG. 16, a television radio signal is received by the antenna 1. The signal received by the antenna 1 is supplied to the tuner unit 2. The tuner section 2 demodulates the composite color video signal and the audio signal of the NTSC system or the PAL system from this television signal. The composite video signal from the tuner unit 2 is supplied to the switch 3a, and the audio signal is supplied to the switch 3b.

An analog composite video color video signal is also supplied to the external video input terminal 4. The composite video signal from the external video input terminal 4 is supplied to the switch 3a. External audio input terminal 5
An analog audio signal is supplied to. This analog audio signal is supplied to the switch 3b.

The switch 3a selects the composite video signal from the tuner section 2 and the composite video signal from the external video input terminal 4. The output of the switch 3a is supplied to the Y / C separation circuit 6 and the synchronization separation circuit 11. The Y / C separation circuit 6 converts the composite video signal from the luminance signal (Y) and the color difference signal (R-
Y, B-Y) are separated.

The luminance signal (Y) and the color difference signals (RY, BY) from the Y / C separation circuit 6 are supplied to the low pass filter 7.
A / D converters 8a, 8b, 8c via a, 7b, 7c
Is supplied to. The low pass filters 7a, 7b and 7c are
The band of the input signal is band-limited in order to remove the aliasing distortion. The cutoff frequency of the low-pass filters 7a, 7b, 7c is, for example, 5.75 MH for the luminance signal (Y, sampling frequency 13.5 MHz (rate of 4)).
z, 2.75M at a sampling frequency of 6.75 MHz (rate of 2) for color difference signals (RY, BY)
Hz and a sampling frequency of 3.375 MHz (rate of 1) is set to 1.45 MHz.

In the sync separation circuit 11, the vertical sync signal (V sync) and the horizontal sync signal (H sync) are extracted.
The vertical sync signal (V sync) and the horizontal sync signal (H sync) from the sync separation circuit 11 are PLL (Phase Locked L).
oop) circuit 12. With this PLL circuit 12,
Basic sampling frequency 1 locked to the input video signal
A 3.5 MHz clock is formed. In addition, this 1
The sampling frequency of 3.5 MHz is 4 as described above.
Called the rate of. This basic sampling frequency 1
A 3.5 MHz clock is supplied to the A / D converter 8a. Also, this basic sampling frequency 13.5MHz
Is supplied to the frequency divider 13, and the frequency divider 13 forms a clock having a frequency ¼ of the basic sampling frequency. A clock (rate of 1) having a frequency 1/4 of the basic sampling frequency is used as the A / D converters 8b and 8c.
Is supplied to.

Digital component video signals Y, RY, BY from the A / D converters 8a, 8b, 8c
Are supplied to the blocking circuit 9. The blocking circuit 9 processes the data on the real screen into blocks of 8 samples × 8 lines. Blocking circuit 9
Is supplied to the shuffling circuit 10 and shuffled. The shuffling is performed in order to avoid intensive loss of data recorded on the tape due to head clogs or lateral scratches on the tape. At the same time, the shuffling circuit 10 rearranges the luminance signal and the color difference signal so that they can be easily processed in the subsequent stage.

The output of the shuffling circuit 10 is supplied to the data compression encoding unit 14. Data compression encoding unit 14
Is a compression circuit using the DCT method or variable-length coding, an estimator for estimating whether the result can be compressed up to a predetermined data amount, and a quantizer for finally quantizing based on the discrimination result. The video data thus compressed is packed in a predetermined sync block by a framing circuit 15 according to a predetermined rule. The output of the framing circuit 15 is supplied to the synthesizing circuit 16.

On the other hand, the switch 3b selects the audio signal from the tuner section 2 and the audio signal from the external audio signal input terminal 5. The output of the switch 3b is supplied to the A / D converter 21. A / D converter 21
At, the analog audio signal is digitized. The digital audio signal thus obtained is supplied to the shuffling circuit 22. Shuffling circuit 2
At 2, the digital audio data is shuffled. The output of the shuffling circuit 22 is supplied to the framing circuit 23. The framing circuit 23 packs the audio data in the audio sync block. The output of the framing circuit 23 is the synthesis circuit 24.
Is supplied to.

The mode processing microcomputer 34 is a microcomputer having a man-machine interface, and operates in synchronization with the field frequency of the television image of 60 Hz or 50 Hz. Since the signal processing microcomputer 20 operates on the side closer to the machine, for example, the number of rotations of the drum is 9
It operates in synchronization with 000 rpm and 150 Hz.

The mode processing microcomputer 34 generates each pack data of the video auxiliary data VAUX, the audio auxiliary data AAUX, and the subcode, and the absolute track number is generated by the signal processing microcomputer 20.

The video preliminary data VAUX generated by the signal processing microcomputer 20 is supplied to the synthesizing circuit 16 via the VAUX circuit 17. The combining circuit 16 combines the video preliminary data VAUX with the output of the framing circuit 15. The audio preliminary data AAUX generated by the signal processing microcomputer 20 is supplied to the synthesis circuit 24 via the AAUX circuit 19. The synthesis circuit 24 outputs the audio preliminary data AA to the output of the framing circuit 23.
UX is synthesized. The outputs of the combining circuits 16 and 24 are supplied to the switch 26. In addition, based on the output of the signal processing microcomputer 20, the subcode circuit 18 uses the data SID and AP3 of the ID part and the subcode pack data SDA.
TAs are generated and supplied to the switch 26.
Further, the sync generation circuit 25 generates respective ID parts of AV (audio / video), pre-sync and post-sync, and supplies them to the switch 26. Further, the circuit 25 generates AP1 and AP2, which are fitted into a predetermined ID part. The switch 26 allows the circuit 2
5 output and ADATA, VDATA, SID, SDA
TA is switched at a predetermined timing.

The output of the switch circuit 26 is supplied to the error correction code generation circuit 27. Error correction code generation circuit 2
At 7, a predetermined parity is added. The output of the error correction code generation circuit 27 is supplied to the randomization circuit 29. The randomization circuit 29 performs randomization so that the recorded data is not biased. The output of the randomization circuit 29 is supplied to the 24/25 conversion circuit 30, and 24-bit data is converted into 25-bit data. As a result, the DC component which is a problem during magnetic recording / reproduction is removed. Here, although not shown, a coding process (1 / 1-D ² ) of PRIV (Partial Response, Class 4) suitable for digital recording is also performed.

The output of the 24/25 conversion circuit 30 is supplied to the synthesis circuit 31. The synthesizing circuit 31 synthesizes audio / video and subcode sync patterns with the output of the 24/25 conversion circuit 30. The output of the combining circuit 31 is supplied to the switch 32.

Further, each data of APT, SP / LP, and PF is output from the mode processing microcomputer 34 which manages the mode of the entire VCR and is supplied to the ITI circuit 33. The ITI circuit 33 generates ITI sector data. The switch 32 switches these data and amble pattern by observing the timing.

The data switched by the switch 32 is further switched by the switch 35 in accordance with the head switching timing. The output of the switch 35 is amplified by the head amplifiers 36a and 36b, and the head 3
7a, 37b.

The switch 40 is an external switch of the VCR main body and is a switch group for instructing recording, reproduction and the like. There is a switch for setting the SP / LP recording mode, and the result is instructed to the mechanical control microcomputer 28 and the signal processing microcomputer 20. A MIC microcomputer 38 is connected to the mode processing microcomputer 34. The MIC microcomputer 38 generates pack data in the APM and MIC. This data is transmitted via the MIC contact 39 to the MIC.
It is supplied to the attached cassette 41.

As described above, in the digital VCR to which the present invention is applied, the digital luminance signal (Y) and the color difference signals (RY, BY) are compressed and recorded in the video sector, and the digital audio signal is audio. Recorded in the sector. Also, VAUX and AAUX can be recorded. The VAUX data and the AAUX data are recorded in a pack structure.

Next, a digital V to which the present invention is applied
The configuration on the reproducing side of the CR will be described with reference to FIGS. 17 and 18. In FIG. 17, heads 101a and 101
The signals obtained from b are the head amplifiers 102a and 102a.
It is amplified by b and switched by the switch 103. The output of the switch 103 is supplied to the equalizer circuit 104. In order to improve the electromagnetic conversion characteristics of the tape and the magnetic head during recording, so-called emphasis processing (for example, partial response, class 4) is performed, but the equalizer circuit 104 performs the reverse processing.

The output of the equalizer circuit 104 is supplied to the A / D converter 106 and the clock extraction circuit 10
5 is supplied. The clock extraction circuit 105 extracts the clock component. With this extracted clock, the output of the equalizer circuit 104 is digitized by using the A / D converter 106. The 1-bit data thus obtained is F
Written to the IFO 107.

The output of the FIFO 107 is supplied to the sync pattern detection circuit 108. Sync pattern detection circuit 1
The sync pattern of each area is supplied to 08 via the switch 109. The switch 109 is switched by the timing circuit 113. The sync pattern detection circuit 108 has a so-called flywheel configuration, and once a sync pattern is detected, it is checked whether or not the same sync pattern comes again after a predetermined sync block length. If this is correct three times or more, for example, it is regarded as true to prevent erroneous detection.

When the sync pattern is detected in this way,
A shift amount is determined which part of the output of each stage of the FIFO 107 should be extracted to extract one sync block. Based on this, the switch 110 fetches the necessary bits into the sync block confirmation latch 111. As a result, the fetched sync number becomes the extraction circuit 1
It is taken out at 12 and inputted to the timing circuit 113. The position of the head on the track can be known from the read sync number, so that the switch 109 or the switch 114 can be switched.

The switch 114 is switched to the lower side during the ITI sector, and the separation circuit 115 causes the IT
The I sync pattern is separated and supplied to the ITI decoder 116. Since the ITI area is coded and recorded, by decoding it, AP
Each data of T, SP / LP and PF can be taken out. This is a mode processing microcomputer 11 that is connected to an operation key 118 outside the set and determines the operation mode of the entire set.
Given to 7.

The mode processing microcomputer 117 is connected to the MIC microcomputer 119 for managing the APM and the like. MI
Information from the cassette 121 with C is the MIC contact 120.
It is given to the microcomputer 119 with MIC via the, and performs the processing of the MIC while sharing the role with the mode processing microcomputer 117. Depending on the set, the MIC microcomputer may be omitted and the mode processing microcomputer 117 may perform the MIC processing. The mode processing microcomputer 117 cooperates with the mechanical control microcomputer 128 and the signal processing microcomputer 151 to perform system control of the entire set.

In the case of the A / V sector or the subcode sector, the switch 114 is switched to the upper side. After the sync pattern of each sector is extracted by the separation circuit 122, it is further supplied to the inverse random number generation circuit 124 through the 24/25 inverse conversion circuit 123 and is returned to the original data string. The data thus extracted is the error correction circuit 12
5 is supplied.

The error correction circuit 125 detects and corrects error data. Data that cannot be corrected is output with an error flag. Switch 1 for each data
It is switched by 26.

The circuit 127 is in charge of the ID part of the A / V sector and each of the presync and postsync, and is stored in the sync number, track number, presync and postsync. SP /
Each signal of LP is extracted. These are given to the timing circuit 113 to create various timings.

Further, the circuit 127 extracts AP1 and AP2, passes them to the mode processing microcomputer, and checks the format. When AP1 and AP2 = 000, area 2 is defined as an image data area and operates normally, but in other cases, warning operation such as warning processing is performed.

The SP / LP is compared with the one obtained from ITI by the mode processing microcomputer 117. In the ITI area, S 3 times in the TIA area.
The P / LP information is written, and the reliability is improved by only the majority vote processing. There are two presyncs each for audio and video, and SP / LP information is written at four locations in total. Here, too, the majority vote is taken and reliability is increased. If the two do not finally match, the one in the ITI area is preferentially adopted.

The reproduction data from the video sector is shown in FIG.
A switch 129 of 8 separates the video data from the VAUX data. The video data is supplied to the deframing circuit 130 together with the error flag. The deframing circuit 130 is where the inverse conversion of framing is performed.

The image data is supplied to the data decompression coding section. That is, the inverse quantization circuit 131 and the inverse compression circuit 1
Through 32, it is returned to the data before compression. Then, the deshuffling circuit 133 and the deblocking circuit 134 return the data to the original image space arrangement.

After the deshuffling, the processing is performed separately for the three systems of the luminance signal (Y) and the color difference signals (RY, BY). Then, the D / A converters 135a, 135b, 1
An analog signal is returned by 35c. At this time, the output divided by the oscillation circuit 139 and the frequency divider 140 is used. That is, the luminance signal (Y) is 13.5 MHz, and the color difference signals RY and BY are 6.75 MHz or 3.375 MH.
z is used.

The signals thus obtained are combined in the Y / C combining circuit 136, and further combined in the combining circuit 137 with the synchronizing signal output of the synchronizing signal generating circuit 141. And
It is output from the output terminal 142 as a composite video signal.

The reproduced data from the audio sector is
The switch 143 separates the audio data from the AAUX data. The audio data is returned to the original time axis by the next deshuffling circuit 145. At this time, the audio data is interpolated based on the error flag, if necessary. This signal is the D / A converter 1
And is converted to an analog audio signal.
Then, the image data is output from the output terminal 147 while keeping timing such as lip sync with the image data.

The respective data of VAUX and AAUX separated by the switches 129 and 143 are supplied to the VAUX circuit 148 and AAUX circuit 150, and preprocessing such as majority processing at the time of multiple writing is performed with reference to the error flag. Done. The ID portion and the data portion of the subcode sector are supplied to the subcode circuit 149. Also here, the preprocessing such as the majority processing is performed with reference to the error flag. After that, the signal is supplied to the signal processing microcomputer 151, and the final reading operation is performed.

[0074]

According to the present invention, the original video is provided by providing an area for storing information for determining whether or not the data recorded on the tape is due to dubbing in the recording date / time pack. It is possible to manage both the date and time information when data and audio data are recorded and the date and time information when dubbing is performed by the MIC. Further, by providing an area for storing the information of the insert channel in the AAUX source control pack, it is possible to know in which channel of the tape the data has been inserted.

[Brief description of drawings]

FIG. 1 is a diagram showing a track format of a tape.

FIG. 2 is a diagram showing a structure of a pack.

FIG. 3 is a diagram showing a hierarchical structure of a header.

FIG. 4 is a diagram showing a pack header table.

FIG. 5 is a diagram showing a track format of a tape.

FIG. 6 is a diagram showing a track format of a tape.

FIG. 7 is a diagram showing a data structure of MIC.

FIG. 8 is a diagram showing a recording date / time pack.

FIG. 9 is a diagram showing program start / end points.

FIG. 10 is a diagram showing a pack array in the MIC.

FIG. 11 is a diagram showing insert start / end points.

FIG. 12 is a diagram showing a pack arrangement in the MIC.

FIG. 13 is a diagram showing an AAUX source control pack.

FIG. 14 is a diagram showing a pack arrangement.

FIG. 15 is a diagram showing a pack arrangement.

FIG. 16 is a block diagram showing a recording system of a digital VCR.

FIG. 17 is a block diagram showing a reproduction system of a digital VCR.

FIG. 18 is a block diagram showing a reproduction system of a digital VCR.

[Description of Reference Signs] 17, 148 VAUX circuit 19, 150 AAUX circuit 25 Sync generation circuit 41, 121 MIC 149 Subcode circuit

Claims (4)

[Claims] 1. A recording / reproducing apparatus for performing recording / reproducing using a recording medium having a memory, wherein the memory is provided with an area for recording auxiliary data related to video data and audio data. The time information at the time of recording the first video data and / or audio data already recorded on the recording medium is written in the area, and the second video data and / or audio data newly recorded on the recording medium. A recording / reproducing apparatus, wherein time information at the time of recording is written in the area. 2. The auxiliary data includes information indicating that the second video data and / or audio data is dubbed on the recording medium.
The recording / reproducing apparatus described. 3. The auxiliary data is obtained by inserting the second video data and / or audio data into the first video data and / or audio data already recorded on the recording medium. The recording / reproducing apparatus according to claim 1, further comprising information indicating 4. The recording / reproducing apparatus according to claim 1, wherein the auxiliary data includes information indicating in which channel of the recording medium the audio data was recorded.