JPH0249275A - Digital voice signal recording method - Google Patents

Abstract

PURPOSE:To keep the number of channels of voice information by performing the double write of the voice information consisting of (n) channels or performing the single write of the voice information consisting of 2n (n>1) channels on an oblique track at the time of performing recording by using a rotary magnetic head. CONSTITUTION:The voice information of eight channels is divided into the even/odd sample of each channel, and the voice information recorded by four heads are recorded in the voice information of eight channels by arranging 16 sectors at appropriate positions. The information block of the even/odd sample is provided with the same constitution, and a WORD item is stored in the voice information, and a CHAN item in a 2ch input use method, and required information in each item such as PREF, etc., and eight bits of USERO are allocated for a discrimination ID for double/single write. For example, it is represented as the double write of all channels when the bit arrangement from an LSB to an MSB are all 0s, and as the single write for only one channel and the double write for remainder when they are [1, 0,...]. By employing such constitution, it is possible to obtain the maximum number (eight channels, in this case) of the voice information.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for recording digital video and audio signals, in which digitized video and audio signals are recorded on a recording medium using a digital VTR. be.

(Prior Art) As a conventional method for recording digital video and audio signals using a VTR, there is, for example, a recording system for component signal digital video and audio signals called the 4:2:2 system.

FIG. 4 is a pattern diagram of data on a tape in this conventional 4:2:2 system. In this 4:2 duplex system, for example, one frame of data is recorded on 20 tracks using the NTSC system. Each track is.

It consists of a video data section called a video sector and an audio data section called an audio sector. Also,
As shown in FIG. 2, the audio data section is located approximately in the middle of each track, and the video data section is arranged to sandwich the audio data section.

Here, in the NTSC system, data for one frame is 10
Since it is divided into segments, two tracks correspond to one segment. FIG. 2 shows a recording pattern for one rotation of the scanner, that is, for four tracks when data is recorded using four heads. Here, the audio data is divided into even samples and odd samples for each channel, and double writing is performed. There are 16 sectors of audio data per scanner revolution as shown in Figure 2.
The data of even and odd samples of each channel is recorded twice.

(Problem to be Solved by the Invention) With the above conventional configuration, when signal processing of a relatively large number of sound sources is required in a studio etc. and audio data of 5 channels or more is required, double writing of audio data is required. The purpose of the present invention is to eliminate the drawbacks of the conventional method, and to provide a digital system that can secure the maximum number of audio data channels by writing audio data in a single layer depending on the case. An object of the present invention is to provide a method for recording video and audio signals.

(Means for Solving the Problems) The method for recording a digital video and audio signal of the present invention is a recording method for recording a digital audio signal on a recording medium using a rotating magnetic head. This method performs double writing of audio data consisting of n channels, or single writing of audio data consisting of 2n(n)1) channels.

Also, the inclined track used when recording digital audio signals onto a recording medium using a rotating magnetic head.

Consists of recorded data that includes at least audio data, and performs double writing of the audio data that consists of n channels, or
Alternatively, perform double writing of audio data consisting of channels, and single writing of audio data consisting of Q channels (2 to 111 = 2n, n>k≧1.u>1
), or single writing of audio data consisting of 2n (n>1) channels is performed.

(Function) With the above configuration, the present invention provides 2 n (n > 1-)
By performing single overwriting of audio data consisting of channels, it is possible to secure the maximum number of audio data channels, and it can be used even when signal processing of a relatively large number of sound sources is required in a studio etc. can.

(Example) An example of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 shows a pattern diagram on a tape using the digital audio signal recording method of the present invention, in which audio data is written in a single layer.

The recording method shown in FIG. 1 is different from the conventional recording method shown in FIG.
The 2:2 format is the same except for the recording method and the audio data section. An ID is added to the audio data to determine whether double writing or single writing is performed. Based on the ID, it is determined that single overwriting is to be performed, and the audio data for 8 channels is divided into each channel, even samples, and odd samples, and recorded in each sector of the audio data portion. When recording with four heads, there are 16 sectors of audio data per revolution of the scanner, and eight channels of audio data are recorded in the arrangement shown in FIG.

Next, I added to the audio data in the embodiment of the present invention
D will be explained based on FIGS. 2 and 3. Second
The figure shows a block configuration of even-numbered sample data. For example, it is data corresponding to 1-E shown in FIG. Note that the block configuration of the data of the odd samples is also the same as that of the even samples.

Each W○RD of WORD~WORD159 shown in Figure 2
is composed of data obtained by digitizing an audio signal in the range of 16 bits to 20 bits.

The 4 bits indicated by CHAN are composed of data indicating how to use two channels of input in the data interface. The 4 bits indicated by PREF consist of data indicating how to use pre-emphasis in encoding audio data.

The 4 bits indicated by LNGH are composed of data indicating the number of bits of audio data. The 8 bits indicated by SMARKO are composed of data indicating that it is the first block of data of even samples. Also, S
The 8 bits indicated by MARKI consist of data indicating that it is the last block of data of even samples. The 4 bits indicated by BCNT are composed of data indicating the number of valid data. The 4 bits indicated by ELAP are composed of data indicating that data has changed due to overwriting due to editing. The 4 bits indicated by 5EQN are composed of data that assists in high-speed processing of 15 consecutive blocks of data.

USER2, USERIO, USER6, USER14
, USER8, USER4, and USERI2 are blank. Note that ROW4゜ROW5. in Fig. 2.
The outer code block of ROW7 is composed of data for error correction of audio data.

Here, 8 bits of USERO are used as an ID for determining whether to perform double writing or single writing of audio data. The specific contents of this ID data are shown in FIG. In the figure, for example, if the bit arrangement from LSB to MSB is (0, 0° 0, O, O, O, O, O), then 1 ch, 2 ch.

3 ah H4ah Indicates that all of the data is to be written twice, and indicates that four channels of audio data are recorded as the number of channels. Also, the bit array is [1°0, O, O
, O, O, O, O), single write with lch, 2c
Double writing on h, double writing on 3ch, double writing on 4ch,
Indicates that single overwriting is performed on 5 channels, indicating 5 channel recording. The bit array is [1°1.1. l, O, O,
O, O), then lch.

2ch, 3ch, 4ch, 5ch, 6ch,
This indicates that all channels 7 and 8 are written in a single layer, and the number of channels is 8 channels of audio data recorded.

The above are the specific data contents regarding the audio data and ID.

As described above, according to this embodiment, an ID is added to the audio data to determine whether single writing or double writing is performed, and based on this ID, one of the audio data of each channel is
By performing overwriting or double writing, it is possible to record audio data for up to 8 channels. That is,
The maximum number of audio data channels can be secured.

In this embodiment, the audio data was recorded in the arrangement shown in FIG. 1, but eight channels of audio data may be recorded in other arrangements. In addition, in this embodiment, an ID is added to USERO shown in FIG. 2 to determine whether single or double writing of audio data is performed, but an ID is added to USERO shown in FIG. Good too. Further, in this embodiment, an ID as shown in FIG. 3 is added, but it is also possible to add an ID of data of another pattern to determine whether to perform single writing or double writing. .

(Effects of the Invention) According to the present invention, an inclined track when recording a digital audio signal on a recording medium using a rotating magnetic head is composed of recording data including at least audio data, and the audio signal is composed of n channels. By performing single writing of data or single writing of audio data consisting of 2n (n>1) channels, the maximum number of audio data channels can be secured. For example, in this embodiment, eight channels can be secured, and even in a studio or the like where signal processing of a relatively large number of sound sources is required, it can be handled, and its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a pattern diagram showing the main part of the tape-hi pattern using the digital audio signal recording method in one embodiment of the present invention, FIG. 2 is a diagram showing the block structure of data of the same even number of samples, and FIG. is the ID added to the same audio data
FIG. 4 is a pattern diagram showing the main part of a pattern on a tape using the conventional 4:2:2 recording method. Patent applicant: Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] (1) When recording a digital audio signal on a recording medium using a rotating magnetic head, the inclined track is made up of recording data that includes at least audio data, and the audio data made up of n channels is double-written. , or 2n(
n>1) A method for recording a digital audio signal, characterized by performing single-layer writing of audio data composed of channels. (2) When recording a digital audio signal on a recording medium using a rotating magnetic head, the inclined track is made up of recording data that includes at least audio data, and the audio data made up of n channels is written twice. , or perform double writing of audio data consisting of k channels, and single writing of audio data consisting of l channels (2
Recording of the digital audio signal according to claim (1), wherein the recording of the digital audio signal is performed by performing the following: k+l=2n, n>k≧1, l>1), or performing single writing of the audio data consisting of 2n (n>1) channels. Method.