JPS5960711A - Encoding and recording/reproducing device of sound signal - Google Patents

Abstract

PURPOSE:To detect previously a reading error of concatenation information and to correct this error, by storing the concatenation information for each track in a reproduction time to define the data corresponding to the stored concentration information as a real data and selecting a reproduction track based on the real data. CONSTITUTION:In a reproduction time, the signal read out of a disk recording/ reproducing part 7 is supplied alternately to RAMs 11 and 12 via a changeover switch 10. The concatenation data among the data written in the RAMs 11 and 12 are supplied to registers 15-17 via a disk controller 8. Then the concatenation data of the present reproduction track is written to those registers together with the concatenation data of the preceding reproduction track and that two times ahead, respectively. The outputs of the registers 15-17 are sent to a coincidence detecting circuit 19, and coincidence is detected among three corresponding joint data. The concatenation data stored in a register 18 is fed to the controller 8. Based on this data, a correct selection (access) is secured for the track to be reproduced next.

Description

[Detailed description of the invention] Field of application on bacterial genus The present invention relates to an lf voice double signal encoding recording/reproducing device.

BACKGROUND TECHNOLOGY AND PROBLEMS In order to perform high-quality, highly reliable recording and playback, audio signals are encoded (PC, M) and recorded on magnetic disks or magnetic drums, and devices that play back the signals are radio or It has been introduced for television broadcasting, etc.

A large number of discontinuous annular tracks are formed on a magnetic disk or a magnetic drum, and these tracks can be read without random access.

For example, a 0.5 second audio percentage is stored in each track, and these are connected and read out during playback, for example from 1 minute to 6 seconds.
A series of audio information of 0 minutes is formed.

Since editing work may be performed after recording, or 1 may be sequentially filled into empty tracks during recording, consecutive track numbers are not necessarily assigned to a series of audio information. For this reason, as track link information?
The track number (address) to be played in
・Written on part of the rack. However, if an error occurs in reading the connecting information during reproduction, the correct IH information will not be reproduced. Such accidents must not occur in broadcasting equipment that requires high reliability.

OBJECTS OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide reliable means for detecting and correcting errors in reading track connection information.

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

FIG. 1 is a block diagram of an audio signal recording and reproducing apparatus d to which the present invention is applied. The audio signal applied to the input terminal (1) in FIG.
A M (4J (supplied to 51. A changeover switch (31 is supplied to RAM +41
And (5) 11111 is my father! It is switched to lJ-.

■<, A M t4) (5) is J
-) Reduce the time axis of the CM double signal so that recorded information is not lost at the joint between tracks.
do. When one of AM(4) and (5) is being read, writing to the other is performed.

The output of RAM +41 +51 is connected to the insertion circuit (6) via a changeover switch (6Y) that can be changed for each track.
Here, track link data, ie, address data instructing the next reproduction track, is inserted and provided to the magnetic disk recording/reproducing section (7). Furthermore, RA
M (4) +51, the insertion circuit (6) and the disk recording/reproducing section (7) are controlled by the disk controller (8) 0 Figure 2 shows the lines showing the data content recorded on each track of the disk (7a). It is a diagram. As shown in FIG. 2, audio POM data is recorded on each track, and connection data is written at the end of the track. The link data is created by the disk controller (8), and includes a plurality of data N indicating, for example, the numbers (addresses) of the next five tracks to be played (addresses) 3, 5, 7° 8.9.
It is composed of 1 to N5.

During playback, the push-out signal from the disc recording/playback unit (7) is transferred to the RAM (II) via the selector switch 00).
(12) are alternately supplied. RAM (II) (121
expands the time axis of the distorted reproduced PCM signal. In the same way as during recording, J, LAMI group and (12) alternately read and write -J1, and each output is turned off with the 1st group switch (I
3) to the I)/A converter (1),
After being converted to an analog audio signal, it is derived from the main air output.

The link data of the data written in the R, A M tllll 1121 is supplied to the registers 151 to (1) via the disk controller (8), and the link data of the current playback track and the previous track are stored in these registers. The playback track, the previous playback track (I + live hit track each connection data is included in t11. For example, register 1 in Figure 6) 10.12 is placed in register 07), and the link data 5, 7, 8, 9.
10 is placed in the register (lfil), and 1 from the previous time
1) Connecting takes of raw tracks, 5, 7, 8.9 are included.

The output of the registers OJ to G7) is the match output circuit El! II
is sent to the corresponding six connected data (derivation). That is, as shown in FIG. 6, the register (
A match is detected between the first i°-data "7-, register 0] of 17), the second j-th data "7" of j), and the sixth data of register 05) + 1711. When a match is detected , the data is true and is stored in the output register 08).Similarly, the register +1'n 0-)
2nd digit, 6th digit of register 0 (K) and register (19
Matching of each data “8” in the 4th digit and register (17)
6th digit of register 06), 4th digit of register (151
A match of data "9" in the fifth digit is detected, and the data for which a match has been detected is stored in the buffer register 08) as shown in FIG.

The connection data stored in the register (G) is sent to the disk controller (8), and based on this data
1. The track to be played is correctly selected (accessed).

Note that the next track is played and register 07 at the time 7)
contains new link data, and register (II)
The original contents of 0() and 0()) are sequentially shifted into registers 06]tl and 1. And each register (I5) to (171
Each corresponding 6Mi ratio is performed again. In this way, as shown in FIG. 6, for example, for the link data "9", a total of 31r!1 match detections (checks) are performed until "9" is entered in the first digit of the register (171).

In other words, for the same link data, there are essentially five (
1) Match detection of 5 pieces of data from the raw track is performed.

is regarded as the data of t. If two or more data reading errors occur regarding the same Unagi data,
- Although no matching results are obtained in the 6 checks, the probability that 6 or more of the same data (5 pieces) appearing in 5 tracks will be incorrect is extremely low, and 1 out of 6 checks
If a match is detected or determined by a majority vote, the register (18) contains data that is considered true () or A (!l-). J positive's high power is extremely strong and strong.
'td f, 1 concatenated data can be detected, and it is possible to prevent unexpected 1's from occurring during on-air. )) - (17) Number 5: The number may be further increased, and the desired effect can be obtained even with a minimum of two.Also, the minimum number of link data recorded on each track is two. (at track 1 two tracks ahead).

Effects of the Invention As described above, the present invention records the addresses of at least two tracks ahead to be reproduced in a part of each track as link information, and stores the link information for each track at the time of playback. The reproduction track is selected based on the data corresponding to the connection information as the true data. As a result, even if an error occurs in reading the link information, it can be detected and corrected in advance, and a stable system can be obtained in which playback is hardly disturbed due to incorrect reading of the link information.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an encoding recording/reproducing apparatus according to an embodiment of the present invention (I), and FIG. 2 shows the contents of data recorded on each track of the disk in FIG. 1. Izl
,? +', 3 [11;t21! 1 Figure 0) Register 0) Contents f i t Figure A'9. In addition, in the symbols used in the drawings, (2)...
・・・・・・・・・Al1) Re: Exchanger (71・・・・・・
...Disc record (14 Ushibu (8)...
・・・・・・ Tisfu controller old） ・・・・・・・・・
... D/A converter (151 (lfil 17X181 """""") register (1H11...
. . . Coincidence f Moxibustion output circuits N1 to N5 . . . Connecting data. Agent Yoshi Tsune Bao 59

Claims (1)

[Claims] C) In a recording device that encodes audio signals and records and reproduces them on a plurality of discontinuous tracks of a randomly accessible recording medium, the address of the track at least two tracks ahead to be reproduced next is sent to the recording side. 11. A means for recording link information on a part of each track is provided; 11. , on the playback side, storage means for storing connection information of reproduced valley tracks for each track, means for detecting coincidence of data corresponding to the connection information of each stored track, and means for detecting coincidence of data corresponding to the connection information of each track. The t# I! is characterized in that each of the t#I! 4-signal encoding recording and reproducing device.