JPH07105631A - Digital data recording method - Google Patents

Abstract

PURPOSE:To make the capacity of recording large when computer data, etc., are recorded by a home VTR by continuously recording data in a data area formed of a necessary area. CONSTITUTION:A servo area 21, a data area 22, a retrieval information area 23, a data area 24 between the areas 21 and 20, a gap area 25 between the areas 22 and 23, etc., are arranged as track areas recorded on a home VTR tape. In normal recording, a speech information area and an image area are arranged in the area 22, and a buffer area is arranged between both the areas; and a speech data area, an outer correction code parity area, and an inner correction code parity area are arranged in the speech information area, and similar areas are arranged in the image area. When the computer data are recorded, the data area of the continuous areas including the buffer area and parity areas 22 and 27 which are each one area are arranged. Therefore, the home digital VTR is used and the buffer area is also utilized to record a large amount of computer data, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method for recording digital data such as video signals and computer data on a recording medium such as a magnetic tape.

[0002]

2. Description of the Related Art In recent years, with the progress of magnetic recording technology and video compression technology, development of a home-use digital VTR which quantizes and samples a video signal, treats it as a digital signal, and compresses and records the image is actively pursued. In a device that records video information using a magnetic tape, audio information is also recorded at the same time. Also, in order to realize so-called dubbing, in which only audio information is rewritten or additionally recorded after recording video information, on the track of the magnetic tape,
To provide an area for recording video information and an area for recording audio information exclusively, and to prevent the effect on other areas when additional recording of video information or audio information is performed between the areas. A buffer region called a gap is provided. Hereinafter, the area for recording video information will be referred to as a video information area, and the area for recording audio information will be referred to as an audio information area.

Further, at the head of the track, there is provided a servo area in which servo information for moving the head in the center of the track is recorded. The servo area is also used to confirm the position of the head on the track when rewriting or additionally recording other areas, and to determine the area to be additionally recorded. Therefore, a gap is provided between the servo area and the other area for preventing the servo area from being affected when the other area is additionally recorded.

Further, in order to perform a high-speed search of video information / audio information, an area for recording search information such as a recording position of a recorded program and time information is provided. Less than,
The area in which this search information is recorded will be called the search information area. A gap is also provided between the search information area and another area in order to rewrite or additionally record only this search information by editing or the like.

FIG. 8 shows an example of the area arrangement of one track in a recording apparatus using a helical scan head. In FIG. 8, 101 is a track, 102 is a servo area, 103 is an audio information area, 104 is a video information area,
Reference numeral 105 is a search information area, and 106, 107 and 108 are gaps.

In a digital VTR, the track has a one-dimensional structure. In the video information area and the audio information area, the data are arranged on a grid and are arranged in the horizontal and vertical directions.
A desired error characteristic is obtained by double error correction coding and error correction during reproduction. At this time, the error correction code to be encoded first is called an outer correction code, and the error correction code to be encoded later is called an inner correction code. In FIG. 8, voice information is stored in a region 109 of the voice information region 103 and oute is stored in a region 110.
The parity of the r correction code and the parity of the inner correction code are recorded in the area 111. In addition, the area 1 of the video information area 104
The video information 12 is recorded, the parity of the outer correction code is recorded in the area 113, and the parity of the inner correction code is recorded in the area 114. Since the audio information generally has a smaller amount of information than the video information and the sizes of the audio information area 103 and the video information area 104 are different, the inner correction code is different between the audio information area 103 and the video information area 104. The same correction code is used, but the outer correction code is different between the audio information area 103 and the video information area 104.

In such a digital VTR, a video signal and an audio signal are digitized and recorded, so that information by a computer or the like can be recorded in the digital VTR.

In a computer data recording apparatus using a magnetic tape, the information recorded on the magnetic tape includes information input from a host such as a computer and
It can be classified into two types of information automatically added by the recording device. Here, the information input from the host will be referred to as data, and the information added by the recording device will be referred to as additional information.

The additional information is the start and end points of the magnetic tape,
For example, an address indicating a position on the magnetic tape. Also,
Data input from the host is divided into blocks and recorded. Information such as the size of this block, how to divide it, and size is also recorded together with the data as additional information.

FIG. 9 shows a block diagram of a conventional apparatus for recording information such as video information, audio information and computer data as described above. In FIG. 9, 120 is a video signal processing circuit, 121 is an audio signal processing circuit, and 122, 12
5,129 are switches, 123 is the outer of the video information area
An error correction coding circuit for performing correction coding, 124 is an error correction coding circuit for performing outer correction coding of the voice information area,
126 is an error correction coding circuit that performs inner correction coding,
127 is a servo information generation circuit, 128 is a search information generation circuit, 130 is a modulation circuit, 131 is a recording head, 132 is a magnetic tape, 133 is a data processing circuit, and 134 is an additional information generation processing circuit.

When recording video information and audio information,
The video signal input to the video signal processing circuit 120 is subjected to processing such as sampling, quantization, and image compression as necessary, and after being arranged in a predetermined manner, it is output to the error correction coding circuit 123 as video information. It The error correction coding circuit 123 performs outer correction coding on the video information. Further, the audio signal input to the audio signal processing circuit 121 is subjected to processing such as sampling, quantization, and audio compression as necessary and arranged in a predetermined manner, and then output to the error correction encoding circuit 124 as audio information. To be done. Error correction coding circuit 124
Encodes the voice information with outer correction. The error correction coding circuit 126 performs inner correction coding on the outputs of the error correction coding circuits 123 and 124. Further, the servo information generation circuit 127 generates servo information, and the search information generation circuit 12
8 generates search information. The video information, audio information, servo information, and search information are input to the modulation circuit 130 at the timing switched by the switch 129. The modulation circuit 130 modulates each information at the timing of recording in each area of the track, and outputs it to the recording head 131 as a recording current across the gap. Recording head 1
Reference numeral 31 electromagnetically converts the recording current and records it on the magnetic tape 132.

When recording data, the input data is input to the data processing circuit 133, arranged in a predetermined manner, and then input to the error correction coding circuit 123. Further, the data is also input to the additional information generation processing circuit 134, additional information is generated according to the input data, and after predetermined alignment, the error correction coding circuit 124.
Entered in. Thereafter, the data is subjected to the same processing as the video information and recorded on the magnetic tape 132. Further, the additional information is subjected to the same processing as the voice information and recorded on the magnetic tape 132.

In this way, the computer data is recorded by the device for recording the audio information and the video information. At this time, the track area arrangement is the same as when recording audio information and video information, and additional information is recorded in the audio information area 103 and data is recorded in the video information area 104.

This household digital VTR compresses an image for each specified number of screens and records it on a magnetic tape. As another method, attempts have been made to compress and transmit more screens at the same time, but this method is more difficult to edit than the method that compresses video for each specified number of screens, and it is faster. Although the image quality at the time of reproduction is inferior, on the other hand, the compression ratio is high and the image can be transmitted with higher image quality or at lower cost. Since such information is also digital data, it can be recorded by a digital VTR.

However, when a larger number of screens are compressed together, it is necessary to separately record the data for special reproduction when performing special reproduction such as high-speed reproduction. Therefore, when recording video information in which a larger number of screens are collectively compressed by a home digital VTR, the video information and the audio information are combined into one, and the video information area 1 is used as normal reproduction data.
04, and special reproduction data is recorded in the audio information area 103.
To record.

[0016]

However, in the recording apparatus as described above, when the data by the computer or the like is recorded in the video information area 104 and the additional information is recorded in the audio information area 103, the digital VTR is used. Since it is not necessary to rewrite each area independently unlike post-recording, and the gap 107 between the video information area 104 and the audio information area 103 is not necessary, the usage efficiency of the magnetic tape is reduced. Also, rewriting search information,
The gap 108 between the video information area 104 and the search information area 105 is also not required if additional recording is not required.

Further, according to the above-mentioned recording method, since the data and the additional information are recorded in the independent areas, if either area becomes full, the other area cannot be used any more and a useless portion occurs. To do. For example, when only a signal consisting of one large block is recorded in one frame, the additional information is only the entire additional information and the additional information of the recorded one block, so that there is a portion that is not used in the audio information area 103. On the contrary, when a large number of signals each including a small block are recorded in one frame, the additional information also becomes large, and when the audio information area 103 becomes full, the additional information cannot be recorded in the blocks larger than that.
Even if the video information area 104 has a space, it cannot be recorded in that frame, and the video information area 104 is wasted.

Further, even when video information of different systems is recorded on the digital VTR, the normal reproduction data and the special reproduction data are not independently rewritten, and the gap between the video information area 104 and the audio information area 103 is not rewritten. 107
Since it is not necessary, the use efficiency of the magnetic tape is reduced.

In general, the audio information area has a large difference in recording capacity compared to the video information area due to the difference in the amount of information. At this time, if the same correction code is used as the inner correction code, the outer correction code of the audio information area having a smaller amount of information becomes shorter than the outer correction code of the video information area, and in order to obtain the necessary burst error correction capability. It is necessary to increase the parity ratio of the outer correction code as compared with the video information area, which increases the redundancy rate of the audio information area.

Since different outer correction codes are used for the two areas, there are two error correction coding circuits, an error correction coding circuit for the audio information area 103 and an error correction coding circuit for the video information area 104. It is necessary to provide a circuit.

[0021]

In order to solve the above-mentioned problems, the digital data recording method of the first invention is 0,
A recording method for recording digital data on a recording medium using a recording device for performing error correction coding on a first video signal for recording, the first video signal and the first audio signal on the recording medium. In the case of recording the first video signal, a dedicated video information area for recording the first video signal, a dedicated audio information area for recording the first audio signal, and the first video signal or When at least one of the first audio signals is re-recorded, a buffer area is formed and recorded, and when an arbitrary signal regardless of the first video signal and the first audio signal is recorded, It is characterized in that an arbitrary signal is subjected to error correction coding and the signal subjected to the error correction coding is continuously recorded in the video information area, the audio area and the buffer area.

According to a second aspect of the present invention, there is provided a digital data recording method for recording digital data on a recording medium using a recording device for performing error correction coding on a first video signal using a correction code for recording. A method for recording a first video signal and a first audio signal on a recording medium, the video information area dedicated to recording the first video signal, and the first audio signal. A dedicated audio information area for recording a signal and a buffer area for re-recording at least one of the first video signal and the first audio signal are formed to form the first video signal and the first video signal. When recording the first arbitrary signal and the second arbitrary signal regardless of the audio signal, the first arbitrary signal is error-correction-encoded using the correction code to the video information area. Record and continue to this before It is characterized in recording a second arbitrary signal and the audio information area and the buffer area.

The digital data recording method of the third invention is a recording method for recording digital data on a recording medium using a recording device for error-correction-coding and recording the first video signal. When recording the first video signal, the first audio signal, and the auxiliary information of at least one of the first video signal and the first audio signal,
A dedicated video information area for recording the first video signal, a dedicated audio information area for recording the first audio signal, an auxiliary information area for recording the auxiliary information, and A first buffer area when re-recording at least one of the first video signal and the first audio signal;
Forming and recording a second buffer area for re-recording at least one of the first video signal and the auxiliary information,
When recording an arbitrary signal, the arbitrary signal is subjected to error correction coding, and the signal subjected to the error correction coding is subjected to the video information area, the audio area, the first buffer area, and the second buffer area. It is characterized by recording continuously.

[0024]

According to the first aspect of the present invention, the above-described structure serves to record an arbitrary signal in the buffer area on the magnetic tape.

In the second invention, the second arbitrary signal is also recorded in the buffer area on the magnetic tape.

In the third aspect of the invention, the first buffer area and the second buffer area also function to record an arbitrary signal on the magnetic tape.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an apparatus according to an embodiment for realizing the digital data recording method according to the first invention. Here, 1 is a video signal processing circuit, 2 is an audio signal processing circuit, 3, 6 and 10 are switches, 4, 5 and 7 are error correction coding circuits, 8 is a servo information generation circuit, and 9 is a search information generation circuit. , 11 is a modulation circuit, 12 is a recording head, 1
3 is a magnetic tape, and 14 is a signal processing circuit.

When recording a video signal and an audio signal,
The video signal input to the video signal processing circuit 1 is subjected to processing such as sampling, quantization, and image compression as necessary, and after being arranged in a predetermined manner, is output to the error correction coding circuit 4 as video information. It The error correction coding circuit 4 performs outer correction coding on the video information. On the other hand, the audio signal input to the audio signal processing circuit 2 is subjected to processing such as sampling, quantization, and audio compression as necessary and arranged in a predetermined manner, and then output as audio information to the error correction encoding circuit 5. To be done. The error correction coding circuit 5 outputs an outer for voice information.
Correct coding. The error correction coding circuit 7 performs inner correction coding on the outputs of the error correction coding circuits 4 and 5. Further, the servo information generation circuit 8 generates servo information, and the search information generation circuit 9 generates search information. The video information, audio information, servo information, and search information are input to the modulation circuit 11 at the timing switched by the switch 10. The modulation circuit 11 modulates each information with a gap at the timing of recording in each area of the track, and outputs it as a recording current to the recording head 12. The recording head 12 electromagnetically converts the recording current and records it on the magnetic tape 13.

When recording an arbitrary signal, the input arbitrary signal is input to the signal processing circuit 14.
The signal processing circuit 14 processes the input arbitrary signal, rearranges it in a predetermined order, and outputs it to the error correction coding circuit 4. The error correction coding circuit 4 performs error correction coding on an arbitrary input signal using the generator polynomial used when outer correction coding is performed on the video information, and outputs the signal to the error correction coding circuit 7. The error correction coding circuit 7 performs inner correction coding on an arbitrary signal that has been outer correction coded, and then the modulation circuit 1
Output to 1. The servo information generation circuit 8 generates servo information, and the search information generation circuit 9 generates search information. The modulation circuit 11 modulates the input arbitrary signal, servo information, and search information with a gap at the timing of recording in each area of the track to obtain a recording current. Recording head 1
2 electromagnetically converts the recording current and records it on the magnetic tape 13.

FIG. 2 shows an area arrangement of tracks when the above-mentioned arbitrary signal is recorded. Here, 20 is a truck, 21
Is a servo area, 22 is a data area, 23 is a search information area, 24 and 25 are gaps, 26 is the arbitrary signal in the data area, 27 is the parity of the outer correction code, and 28 is inn.
er is the parity of the correction code. The data area 22 is an area for recording the above-mentioned arbitrary signal, and includes an audio information area 103, a gap 112, and a video information area 104. Also,
The arrangement of tracks on which video information and audio information are recorded is the same as in the conventional example.

By recording the type of the signal to be recorded, the recording method, or a signal representing these in the servo information area of the track, it is possible to determine the type of the recorded signal during reproduction. .

By recording an arbitrary signal in this manner, the gap 107 described in FIG. 8 can be recorded without wasting it, so that it is possible to record a larger amount of information than in the conventional case. .

In the past, different outer correction coding was used for the audio information area and the video information area, respectively, whereas one outer correction having a small redundancy rate and a long code length was used in one area. Since the sign can be used,
It becomes possible to record a larger amount of information than in the conventional case. Furthermore, when configuring a recording device that records only arbitrary signals without recording video and audio information, the outer
Only one error correction coding circuit that performs correction coding is required.
There is an advantage that the circuit configuration becomes simple.

FIG. 3 is a block diagram of the signal processing circuit 14 for recording computer data on a magnetic tape. The input computer data is input to the additional information generation circuit 30 and the data processing circuit 31. The additional information generation circuit 30 generates additional information from the input computer data and outputs it to the data processing circuit 31. The data processing circuit 31 rearranges the input computer data and the additional information in a predetermined order and outputs them. In this way, the computer data is recorded on the magnetic tape.

A block of the signal processing circuit 14 when recording a video signal input to the video signal processing circuit 1 or the audio signal processing circuit 2 or a video signal or audio signal of a system different from the audio signal on the magnetic tape. The figure is shown in FIG. The input video signal or audio signal of a different system is input to the special reproduction data generation circuit 35 and the formatter 36. The special reproduction data generation circuit 35 generates special reproduction data from the input normal reproduction data, that is, a video signal or an audio signal of a different system, and the formatter 36.
Output to. The formatter 36 rearranges and outputs the input normal reproduction data and special reproduction data in a predetermined order. In this way, different types of video signals or audio signals are recorded on the magnetic tape.

An embodiment of the second invention will be described below with reference to the drawings. FIG. 5 is a block diagram of an apparatus for implementing a digital data recording method according to the second invention, according to an embodiment. Here, 1 is a video signal processing circuit, 2 is an audio signal processing circuit, 6, 10, 42, 43 are switches, 4, 5, 7
Is an error correction coding circuit, 8 is a servo information generation circuit, 9 is a search information generation circuit, 11 is a modulation circuit, 12 is a recording head, 13 is a magnetic tape, and 40 and 41 are signal processing circuits.

When recording a video signal and an audio signal, the video signal input to the video signal processing circuit 1 is subjected to processing such as sampling, quantization, image compression, etc., if necessary, and is arranged in a predetermined manner. After that, it is output to the error correction coding circuit 4 as video information. The error correction coding circuit 4 performs outer correction coding on the video information. Audio signal processing circuit 2
The audio signal input to the
After being subjected to processing such as quantization and voice compression and arranged in a predetermined manner, it is output to the error correction coding circuit 5 as voice information. The error correction coding circuit 5 performs outer correction coding on the voice information. The error correction coding circuit 7 is the error correction coding circuit 4
And inner-correction-encode the outputs of 5 and 5. Further, the servo information generation circuit 8 generates servo information, and the search information generation circuit 9 generates search information. These video information, audio information, servo information, and search information are input to the modulation circuit 11 at the timing switched by the switch 10.
The modulation circuit 11 modulates each information with a gap at the timing of recording in each area of the track, and outputs it as a recording current to the recording head 12. The recording head 12 electromagnetically converts the recording current and records it on the magnetic tape 13.

When recording two arbitrary signals (hereinafter referred to as the first signal and the second signal), the input first signal is input to the signal processing circuit 40. The signal processing circuit 40 performs signal processing on the input first signal, rearranges the signals in a predetermined order, and outputs the rearranged signals to the error correction coding circuit 4. The error correction coding circuit 4 performs error correction coding using the correction code used for outer correction coding the video information on the input first signal, and outputs the error correction coding circuit 7 to the error correction coding circuit 7. Further, the input second signal is input to the signal processing circuit 41. The signal processing circuit 41 rearranges the input second signals in a predetermined order and outputs them to the error correction coding circuit 7. The error correction coding circuit 7 performs inner correction coding and then outputs it to the modulation circuit 11. The servo information generation circuit 8 generates servo information, and the search information generation circuit 9 generates search information and outputs it to the modulation circuit 11. Modulation circuit 11
Is a recording current that modulates the input first and second signals, servo information, and search information with a gap between them at the timing of recording in each area of the track. The recording head 12 electromagnetically converts the recording current and records it on the magnetic tape 13.

FIG. 6 shows the track area arrangement when two arbitrary signals are recorded. Here, 20 is a track, 2
1 is a servo area, 23 is a search information area, 24 and 25 are gaps, 45 is a first data area, 46 is a second data area, 47 is a first signal, 48 is an inner correction code parity, and 49 is The second signal, 50 is the outer correction code parity, and 51 is the inner correction code parity, respectively.

In this way, an arbitrary signal is sent to the video information area, the audio information area, and the gap between them (10 in FIG. 8).
7) Record in the page. At this time, the first signal is error-correction-coded and recorded in the first data area, which is the same area as the video information area 104, as in the case of recording the video information. Also, the second signal is inner-correction coded as in the case of recording video and audio information,
It is recorded in the second data area which is the same area as the area in which 3 and the gap 107 are combined. When the video information and the audio information are recorded, the track arrangement is the same as the conventional track arrangement.

In such a recording method, since the outer correction coding is not performed on the second signal, the first signal and the second signal
A difference occurs in the error characteristics of the signals. Therefore, as the second signal, a signal that does not require the correction capability of the first signal or a signal whose correction capability is guaranteed by multiple recording may be used.

Further, during special reproduction, since the head path is different from that during normal reproduction, it is not possible to obtain all the recorded areas, and error correction cannot be performed using the outer correction code. Therefore, the special reproduction data can be used as the second signal.

By recording the type of the signal to be recorded, the recording method, or a signal representing these in the servo information area of the track, it is possible to determine the type of the signal recorded at the time of reproduction.

By recording an arbitrary signal in this manner, the gap 107 can be recorded without wasting it, so that it is possible to record a larger amount of information than in the conventional case.

Further, the redundancy rate of the voice information area 103 is high.
Since it is not necessary to use the outer correction code, it is possible to record a larger amount of information as compared with the conventional one.

In contrast to the conventional case where different outer correction codes are used in the audio information area and the video information area, by using one outer correction code in the first data area, the video and audio information is In the case of configuring a recording device that records the first signal and the second signal without recording, the advantage is that only one error correction encoding circuit that performs outer correction encoding is required and the circuit configuration becomes simple. is there.

An embodiment of the third invention will be described below with reference to the drawings. The digital data recording method of the third invention is
This can be realized by the block diagram shown in FIG. 1 described above.

When recording video information and audio information,
And the processing operation of each circuit when recording an arbitrary signal is
Since the contents are basically the same as the contents described in FIG. 1, the description thereof will be omitted.

FIG. 7 shows the track area arrangement when an arbitrary signal is recorded. Here, 20 is a track, 21 is a servo area, 60 is a data area, 23 is a search information area,
24 is a gap, 61 is the arbitrary signal in the data area,
62 is the parity of the outer correction code, and 63 is the parity of the inner correction code. The data area 61 is an area for recording an arbitrary signal, and includes the audio information area 103, the gap 107, the video information area 104, and the gap 108 shown in FIG. Further, the track arrangement when recording video information and audio information is the same as the conventional example.

Further, by recording the type of the signal to be recorded, the recording method, or a signal representing these in the servo information area of the track, it is possible to determine the type of the signal recorded during reproduction.

By recording an arbitrary signal in this manner, the gaps 107 and 108 (FIG. 8) can be recorded without wasting, so that it is possible to record a larger amount of information than in the conventional case. Becomes

Conventionally, different outer correction codes are used in the audio information area and the video information area, respectively, whereas one outer correction having a long redundancy and a small redundancy rate is used in one area. Since the sign can be used,
It becomes possible to record a larger amount of information than in the conventional case. In addition, when configuring a recording device that records only arbitrary signals without recording video and audio information, oute
There is the advantage that only one error correction coding circuit that performs r correction coding is required, and the circuit configuration becomes simple.

The signal processing circuit 14 for recording computer data on a magnetic tape is the circuit shown in the block diagram of FIG. 3 and can be realized in the same manner as in the first embodiment of the invention. The input computer data is input to the additional information generation circuit 30 and the data processing circuit 31. The additional information generation circuit 30 generates additional information from the input computer data and outputs it to the data processing circuit 31. The data processing circuit 31 rearranges the input computer data and the additional information in a predetermined order and outputs them. In this way, the computer data is recorded on the magnetic tape.

The signal processing circuit 14 for recording a video signal input to the video signal processing circuit 1 or the audio signal processing circuit 2 or a video signal or audio signal of a system different from the audio signal on the magnetic tape is shown in FIG. The circuit shown in the block diagram of FIG. 4 can be realized in the same manner as the embodiment of the first invention. The input video signal and audio signal of different systems are input to the special reproduction data generation circuit 35 and the formatter 36.
The special reproduction data generation circuit 35 generates special reproduction data from the input normal reproduction data, that is, a video signal or an audio signal of a different system, and outputs the special reproduction data to the formatter 36. The formatter 36 rearranges the input normal reproduction data and special reproduction data in a predetermined order and outputs them. In this way, video signals and audio signals of different systems are recorded on the magnetic tape.

The above-mentioned first invention, second invention,
In the embodiment of the third invention, the order in the track when recording the video information and the audio information is the video information after the audio information, but the order may be reversed. Also, the block diagram shown here is an example, and data and additional information may be recorded by other methods.

Further, although it has been stated that the types of signals to be recorded or the recording method or signals representing these are recorded in the servo information area of the track, the servo information area, the data recording area, the video information area, the audio information area, the search information area. Any of the above, or may be recorded in a plurality of areas. In this case, if there is an auxiliary storage medium such as a memory on the cassette containing the magnetic tape, it may be stored in the auxiliary storage medium, or if there is a linear track formed in the longitudinal direction of the magnetic tape, You may record on a linear track.

In the embodiment of the first invention, when the video signal and the audio signal of different systems are recorded, the special reproduction data of the video information is generated and recorded. It is also possible to add and record data for reproduction.

Further, in the embodiment of the second invention, the special reproduction data of the video information is recorded as the special reproduction data, but the special reproduction data of the audio information may be additionally recorded.

[0060]

As described above, according to the first aspect of the invention, in a device for recording an arbitrary signal such as computer data or a video signal of a different system by using a home digital VTR, a video information area and an audio signal are recorded. By using the information area and the gap between them together as one area and recording an arbitrary signal, it is possible to improve the use efficiency of the magnetic tape, reduce the cost, or record a large capacity. Furthermore, when only computer data is recorded, the circuit is simplified by using the error correction method in the video information area of the digital VTR for error correction.
The circuit can be shared with a home digital VTR, and its cost merit is large.

According to the second invention, the digital V
In an apparatus for recording two arbitrary signals such as a video signal of a different system and data for special reproduction using TR,
By using the video information area and the audio information area and the gap between them as one area, and recording the normal reproduction data and special reproduction data, the efficiency of use of the magnetic tape can be improved, the cost can be reduced, or the long time can be reduced. It becomes possible to record. Furthermore, in an apparatus that records only video signals of different systems, the error correction circuit can be simplified and the circuit can be shared with a home digital VTR, and its cost merit is large.

According to the third aspect of the invention, in an apparatus for recording an arbitrary signal such as computer data or a video signal of a different system by using a home digital VTR,
By using the gap between the video information area and the audio information area and the gap between them and the gap between the video information area and the search information area as one area and recording an arbitrary signal, the use efficiency of the magnetic tape is improved and the cost is reduced. It is possible to lower the value or record a large amount of capacity. Further, when only computer data is recorded, the error can be corrected by using the error correction method in the video information area of the digital VTR, thereby simplifying the circuit and sharing the circuit with the home digital VTR. There are significant cost advantages.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus for realizing the digital data recording methods of the first and third inventions.

FIG. 2 is a pattern diagram showing an area of a recording track according to the first invention.

FIG. 3 is a block diagram showing an example of a signal processing circuit 14 for recording computer data according to the first, second and third inventions.

FIG. 4 is a block diagram showing an example of a signal processing circuit 14 for recording video / audio signals of different systems according to the first, second and third inventions.

FIG. 5 is a block diagram showing an embodiment of an apparatus for realizing the digital data recording method of the second invention.

FIG. 6 is a pattern diagram showing an area of a recording track according to the second invention.

FIG. 7 is a pattern diagram showing an area of a recording track according to a third invention.

FIG. 8 is a pattern diagram of a track recorded by a conventional digital data recording method.

FIG. 9 is a block diagram of an apparatus for realizing a conventional digital data recording method.

[Explanation of symbols]

 1 Video signal processing circuit 2 Audio signal processing circuit 3 Switch 4 Error correction coding circuit 5 Error correction coding circuit 6 Switch 7 Error correction coding circuit 8 Servo information generation circuit 9 Search information generation circuit 10 Switch 11 Modulation circuit 12 Recording head 13 magnetic tape 14 signal processing circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Kawakami 2-2-10, Kotobuki-cho, Takamatsu-shi, Kagawa Matsushita Electronics Co., Ltd. (72) Inventor Masazumi Yamada 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. Sangyo Co., Ltd. (72) Inventor Chiyoko Matsumi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (13)

[Claims] 1. A recording method for recording digital data on a recording medium using a recording device for performing error correction coding on a first video signal and recording the same, wherein the first video signal is recorded on the recording medium. When recording the first audio signal, a dedicated video information area for recording the first video signal,
A dedicated audio information area for recording the first audio signal and a buffer area for re-recording at least one of the first video signal and the first audio signal are formed and recorded, When recording an arbitrary signal regardless of the first video signal and the first audio signal, the arbitrary signal is error-correction coded, and the error-correction coded signal is recorded in the video information area and the audio area. And a buffer area, and the data is recorded subsequently. 2. The digital data recording method according to claim 1, wherein the information indicating the type of the signal to be recorded or the recording method is recorded in an area other than the video information area, the audio information area and the buffer area. 3. The digital data recording method according to claim 2, wherein the arbitrary signal is computer data and additional information related thereto. 4. The digital data recording method according to claim 2, wherein the arbitrary signal is at least a second video signal and special reproduction data of the second video signal. 5. The digital data recording method according to claim 3, wherein the type of the signal to be recorded or the recording method is stored in an auxiliary storage medium on the cassette. 6. A recording method for recording digital data on a recording medium using a recording device for performing error correction coding on a first video signal using a correction code for recording. When recording a first video signal and a first audio signal, a dedicated video information area for recording the first video signal and a dedicated audio information for recording the first audio signal An area and a buffer area for re-recording at least one of the first video signal and the first audio signal, and a first arbitrary signal regardless of the first video signal and the first audio signal. When recording the signal and the second arbitrary signal, the first arbitrary signal is error-correction-encoded using the correction code and recorded in the video information area, and subsequently the second arbitrary signal is recorded. Any signal of the voice information area and the A digital data recording method characterized by recording in a collision area. 7. The digital data recording method according to claim 6, wherein a signal indicating the type of a signal to be recorded or a recording method is recorded in an area other than the video information area, the audio information area, and the buffer area. 8. The first arbitrary signal is a second video signal different from at least the first video signal, and the second arbitrary signal is at least special reproduction data of the second video signal. 8. The digital data recording method according to claim 7, wherein. 9. The digital data recording method according to claim 8, wherein the type of the signal to be recorded or the recording method is stored in an auxiliary storage medium on the cassette. 10. A recording method for recording digital data on a recording medium using a recording device for performing error correction coding on a first video signal for recording, the first video signal and the first video signal. When recording the audio signal, and the auxiliary information of at least one of the first video signal and the first audio signal, a dedicated video information area for recording the first video signal, and the first video signal When re-recording at least one of a dedicated audio information area for recording one audio signal, an auxiliary information area for recording the auxiliary information, and the first video signal or the first audio signal In the case of forming and recording the first buffer area and the second buffer area for re-recording at least one of the first video signal and the auxiliary information, and recording an arbitrary signal, Error correction coding of arbitrary signal A digital data recording method, characterized in that the error-correction-coded signal is recorded successively in the video information area, the audio area, the first buffer area, and the second buffer area. 11. A digital data recording method according to claim 10, wherein information indicating a type of a signal to be recorded or a recording method is recorded in an area other than the video information area, the audio information area and the buffer area. 12. The arbitrary signal is computer data and additional information related to the computer data.
The digital data recording method described in 0. 13. The digital data recording method according to claim 12, wherein the type of the signal to be recorded or the recording method is stored in an auxiliary storage medium on the cassette.