JPH06139698A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a DCC system keeping recorded character information data for specifying a frequency characteristic at the time of recording and automatically adjusting the frequency characteristic based on the character information data for specifying the frequency characteristic at the time of reproduction. CONSTITUTION:The character information data for specifying the frequency characteristic ('ROCK', 'POPS', etc.) are recorded by a switch 26 for selecting the kind of musics at the time of recording data to the magnetic tape from a reproducing device 1 (compact disk, etc.). Then, at the time of tape reproduction, a frequency characteristic pattern of the audio signal reproduced by a frequency characteristic adjusting circuit 14 is adjusted based on the character information data for specifying the frequency characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention records various sub-codes on one auxiliary track among a plurality of tracks extending in the tape longitudinal direction of a signal recording tape, and records on a plurality of other audio tracks. The present invention relates to a DCC (Digital Compact Cassette) system having a multi-channel head for recording an audio signal.

[0002]

2. Description of the Related Art As described in "Nikkei Electronics" September 2, 1991, pp. 134-141, DCC is a cassette tape of approximately the same size as an analog compact cassette player. On the other hand, an audio signal is recorded by a digital method, and a digitized audio signal is data-compressed by a high efficiency encoding called PASC and recorded on an 8-channel audio track of a magnetic tape.
Further, in the DCC, signals such as time information and music number information are recorded on a 1-channel auxiliary track of the magnetic tape.

FIG. 2 shows a head assembly 31 mounted on the DCC. A recording thin film multi-head 6 and a reproducing thin film multi-head 7 each having 9 channels are provided corresponding to one side area in the width direction of the magnetic tape 24. It is arranged.

The recording thin film multi-head 6 has an auxiliary head chip 27 at the uppermost stage and eight audio head chips 28 at the lower stage, and the reproducing thin film multi-head 7 has an auxiliary head chip 29 at the uppermost stage. , 8 audio head chips 30 are provided in the lower stage.

Further, the head assembly 31 is equipped with a pair of head chips 32 and 33 for reproducing an analog signal corresponding to the other side area of the magnetic tape 24.
By rotating the head assembly 31 by 180 degrees, recording and reproduction can be performed on both the A side and the B side of the magnetic tape 24.

The DCC defines the mounting direction of the tape, and when the tape is run, the A surface and the B surface are uniquely determined.

By the way, in the DCC standard, additional information other than time information and music number information, a marker ID,
Subcodes such as sector markers and future markers are defined. The marker ID includes a label ID indicating the beginning of a song, a sector marker ID indicating a program area, and the like, and the sector marker includes a reverse marker, a next marker, a home marker, a stop marker, a use again marker, and the like. Future markers include skip markers and mute markers.

For example, the next marker can be used on both the A side and the B side, and when the marker is used during reproduction, operation control is performed so that reproduction is started from the head portion of the surface opposite to the present. .

Also, the use again marker can be used on both sides A and B, and the marker is A
If it is recorded on the side B, it means that the remaining tape portion of the side A and all of the side B can be recorded. If it is recorded on the side B, the remaining tape portion of the side B is recorded. It means recordable.

The user can realize various recording and reproducing operations by recording these markers and IDs on the magnetic tape.

[0011]

The above-mentioned marker I
D has a label ID indicating the beginning of the song, and character information can be recorded in the additional information space of the label ID.

[0012] On the other hand, in the case of a reproducing apparatus, when reproducing, it is common to change the sound quality by a frequency characteristic adjusting circuit such as a graphic equalizer according to the taste of the listener and listen. However, with the current recording / playback devices, it is difficult for the system to determine which type of song is being played at the time of playback, and each time the listener plays the song, he or she sets the desired sound quality. is the current situation.

An object of the present invention is to use the above-mentioned DCC character information so that the listener records the character information corresponding to the reproduced sound quality at the time of recording so that the sound quality corresponding to the character information is automatically reproduced at the time of reproduction. The purpose is to eliminate the need for the listener to set the playback sound quality for each playback.

[0014]

In order to solve the above problems, the present invention records various sub-codes on one auxiliary track among a plurality of tracks extending in the tape longitudinal direction of a signal recording tape, In a DCC (digital compact cassette) system having a multi-channel head for recording audio signals on a plurality of other audio tracks, a plurality of previously prepared audio signals are recorded on the signal recording tape. In order to record at least one of the frequency characteristic designation character information data defined corresponding to each of the frequency characteristic patterns on the auxiliary track of the signal recording tape, at least one of the plurality of frequency characteristic patterns is recorded. The frequency characteristic designating means for designating and the audio signal recorded on the signal recording tape are reproduced in advance. Of the plurality of frequency characteristic patterns provided, frequency characteristic adjusting means for adjusting the frequency characteristic of the audio signal to be reproduced according to the frequency characteristic pattern corresponding to the frequency characteristic specifying character information data recorded on the auxiliary track. It is intended to provide a magnetic recording / reproducing apparatus characterized by comprising:

[0015]

With the above construction, the frequency characteristic specifying character information data corresponding to the frequency characteristic pattern designated by the frequency characteristic designating means is recorded on the auxiliary track at the time of recording, and at the time of reproduction, by the frequency characteristic adjusting means. The audio signal is reproduced with the frequency characteristic pattern corresponding to the frequency characteristic designation character information data recorded on the auxiliary track.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

First, the configuration of the DCC system of the present invention will be described with reference to FIG. An audio signal from a reproducing device 1 (for example, a compact disc player, a tape recorder, etc.) is input to an A / D conversion circuit 3 via a dubbing circuit 2 and converted into a digital signal. The digital signal is supplied to a well-known PASC processing circuit 4,
Data compression and high efficiency coding are performed.

The digital signal output from the PASC processing circuit 4 is input to the digital signal processing circuit 5 and subjected to interleaving, addition of an error correction code, and further addition of a subcode, and a recording amplifier. The signal is sent to the recording thin-film multi-head 7 via 6 as a recording signal for 9 channels.

Then, a signal is recorded on the magnetic tape 24 by the recording thin film multi-head 7.

The 9-channel signal reproduced from the magnetic tape 24 by the reproducing thin-film multi-head 8 is supplied to the equalizer circuit 10 via the reproducing amplifier 9 to be subjected to waveform equalization and a PLL clock for data extraction. Is generated.

The output of the equalizer circuit 10 is sent to the digital signal processing circuit 11 and subjected to processing such as error correction. The processed signal is further supplied to the PASC processing circuit 12, subjected to time axis expansion and decoding, and becomes the original digital signal.

The digital signal is converted into an analog signal through the D / A conversion circuit 13, and the frequency characteristic is adjusted by the frequency characteristic adjusting circuit 14, and then the output terminal 15 is provided.
Is output to the subsequent circuit. Frequency characteristic adjusting circuit 1
4 has a function of adjusting / changing an audio signal to be reproduced into a plurality of frequency characteristic patterns.

The DCC magnetic tape 24 is wound and rewound by a reel motor 16 and a reel motor 19, and the tape is conveyed by a capstan motor 17 and a capstan motor 18.

The rotation of the capstan motor 17 and the capstan motor 18 is controlled by a motor control circuit 20.

Further, a control circuit 21 for controlling the entire system is provided, and the motor control circuit 20, the reel motor 16, the reel motor 19 and the tape according to the information from the key input terminal 22 and the mechanical switch input terminal 23. It outputs a control signal to each mechanism such as the traveling system.

Further, a code generation / decoding circuit 32 for generating and decoding sub-codes such as various markers and IDs is provided, and a sub-code is created according to data exchange with the control circuit 21 to generate a digital signal processing circuit. 5, or decodes the subcode from the digital signal processing circuit 11.

FIG. 3 shows the structure of the main data recorded on 8 tracks of the magnetic tape. One tape frame is composed of 32 data blocks and an interframe gap (IFG).

The tape block is composed of a header (3 symbols) and a body (48 symbols).
The symbol is 10 bits. Also, one header is
It is divided into a sync pattern, a frame address, and a block address.

Further, FIG. 4 shows the data structure of the subcode recorded on the auxiliary track. In order to suppress errors, the bit rate is reduced to 1/8 of that of the main data. Here, the label ID including character information, other IDs, and various markers are recorded in the body of each tape block.

[Operation at the time of recording] When the recording mode is set according to the operation key signals and the mechanism detection signals of the input terminals 22 and 23, the magnetic tape 2 is controlled under the control of the control circuit 21.
Recording on 4 is started.

For the digital signal processing circuit 5, subcodes generated by the code generation / decoding circuit 25, that is, various IDs such as label IDs indicating the beginning of each song, markers, time information, track numbers, etc. Is supplied to the recording thin film multi-head 7 via the recording amplifier 6 and the magnetic tape 2 is supplied with the sub-code information.
It is recorded on 4 auxiliary tracks.

At this time, the state of the music type selection switch 26 is judged by the control circuit 21, and the frequency characteristic designation character information data (for example, "ROCK", "POP" corresponding to the state is determined.
S ”,“ CLASSIC ”,“ JAZZ ”, etc.) is generated, and an error correction code is added to the code corresponding to the frequency characteristic designation character information data every time the label ID is recorded, and the additional information space on the label ID is added. Recorded in. The frequency characteristic designation character information data is defined in correspondence with a plurality of frequency characteristic patterns included in the frequency characteristic adjusting circuit.

The music type selection switch is composed of a plurality of non-lock switches (or lock switches) or a single non-lock switch (or lock switch) which cyclically changes by the control circuit 21, and the state of the switches. Is determined by the control circuit 21 and the frequency characteristic designation character information data is uniquely selected.

FIG. 5 shows a flowchart for recording the audio signal. First, operate the song type selection switch to select the desired frequency characteristic pattern ("ROCK", "PO").
"PS", "CLASSIC", "JAZZ", etc.) is selected (S1). When the start of dubbing is instructed (S
2) Set the DCC system to the recording mode (S
3). When the playback device starts playback (S4) (S
5) Then, dubbing is started (S6). The label ID is recorded at the start of recording, but the frequency characteristic designation character information data corresponding to the music type selection switch selected at this time is recorded. This frequency characteristic designation character information data is recorded every time the beginning of the music performance is started (S8). When the playback device finishes playback, dubbing ends (S9).

[Operation at the time of reproduction] The sub-code recorded on the magnetic tape 24, that is, the label I indicating the beginning of each song
Various IDs such as D, markers, time information, track numbers, etc. are reproduced by the reproducing thin-film multi-head 8 and then error detection and correction are performed by the digital signal processing circuit 11 to generate the code generation / decoding circuit 25. Is supplied to.

Then, the code generation / decoding circuit 25 decodes the sub-code and supplies the result to the control circuit 21, whereby various operation controls are executed.

At this time, if the frequency characteristic designating character information data recorded by the above-mentioned recording operation is decoded, the control circuit 21 changes the reproduction frequency characteristic pattern corresponding to the frequency characteristic designating character information data to frequency. Characteristic adjustment circuit 14
Adjust with.

FIG. 6 shows a flowchart for reproducing an audio signal. When the DCC system is instructed to reproduce (S1), the label ID is detected and the frequency characteristic designation character information data is reproduced (S2). When there is a character string corresponding to the music type selection switch (S3), the frequency characteristic circuit 14 changes the reproduction frequency characteristic pattern.
"When there is a character string corresponding to the song type selection switch" is because the title of the song can be recorded in the label ID. Whether the character string is frequency characteristic designation character information data or other character information. It is necessary to determine if it is.

[0039]

As described above in detail, according to the present invention, of the plurality of tracks extending in the tape longitudinal direction of the signal recording tape, one sub-track is recorded with various sub-codes, and other sub-codes are recorded. DCC with multi-channel head for recording audio signals on multiple audio tracks
In the (digital compact cassette) system, when the audio signal is recorded on the signal recording tape, among the frequency characteristic designation character information data defined corresponding to each of the plurality of frequency characteristic patterns prepared in advance. , At least one of the plurality of frequency characteristic patterns for recording at least one on an auxiliary track of the signal recording tape, and reproduction of the audio signal recorded on the signal recording tape. At this time, the frequency characteristic of the audio signal to be reproduced is adjusted according to the frequency characteristic pattern corresponding to the frequency characteristic designation character information data recorded on the auxiliary track among the plurality of frequency characteristic patterns prepared in advance. Since it is equipped with frequency characteristic adjustment means, the frequency characteristic that the listener will respond to the reproduced sound quality at the time of recording By recording constant character information data, the sound quality corresponding to the frequency characteristic specification character information data is automatically set at the time of reproduction, and the listener does not need to adjust the reproduction sound quality at each reproduction. The burden can be reduced.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing a configuration of a DCC system according to the present invention.

FIG. 2 is a perspective view of a head assembly installed in a DCC system.

FIG. 3 is a diagram showing a structure of main data.

FIG. 4 is a diagram showing a structure of auxiliary data.

FIG. 5 is a flowchart illustrating the operation of the present invention.

FIG. 6 is a flowchart illustrating the operation of the present invention.

[Explanation of symbols]

 1 Playback Equipment 2 Dubbing Circuit 3 A / D Conversion Circuit 4 PASC Processing Circuit 5 Digital Signal Processing Circuit 6 Recording Amplifier 7 Recording Thin Film Multihead 8 Reproducing Thin Film Multihead 9 Reproducing Amplifier 10 Equalizer Circuit 11 Digital Signal Processing Circuit 12 PASC Processing Circuit 13 D / A conversion circuit 14 Frequency characteristic adjustment circuit 15 Output terminal 16 Reel motor 17 Capstan motor 18 Capstan motor 19 Reel motor 20 Motor control circuit 21 Control circuit 22 Key input terminal 23 Mechanical switch input terminal 24 Magnetic tape 25 Code generation / Decoding circuit

Claims (1)

[Claims] 1. A multi-recorder for recording various sub-codes on one auxiliary track of a plurality of tracks extending in the tape longitudinal direction of a signal recording tape and recording audio signals on the other plurality of audio tracks. In a DCC (Digital Compact Cassette) system equipped with a channel head, a frequency characteristic defined corresponding to each of a plurality of frequency characteristic patterns prepared in advance when recording an audio signal on the signal recording tape. In order to record at least one of the designated character information data on the auxiliary track of the signal recording tape, frequency characteristic designating means for designating at least one of the plurality of frequency characteristic patterns, and recorded on the signal recording tape. Of the plurality of frequency characteristic patterns prepared in advance when the audio signal is reproduced. A magnetic recording / reproducing apparatus comprising: frequency characteristic adjusting means for adjusting the frequency characteristic of an audio signal to be reproduced in accordance with a frequency characteristic pattern corresponding to the frequency characteristic specifying character information data recorded on a track.