CN1035290C

CN1035290C - Multichannel optical disk time sound recording system

Info

Publication number: CN1035290C
Application number: CN93115967A
Authority: CN
Inventors: 许辉; 曹卫东; 贾信; 褚玉清; 李连庆; 韦世党; 郭文毅; 廖先林
Original assignee: HUITONG INST OF ELECTRONICS SHENYANG
Current assignee: HUITONG INST OF ELECTRONICS SHENYANG
Priority date: 1993-12-14
Filing date: 1993-12-14
Publication date: 1997-06-25
Anticipated expiration: 2013-12-14
Also published as: CN1103973A

Abstract

The present invention provides a digital type multi-channel time sound recording system. Sixteen paths of sound and one path of time can be simultaneously recorded and selected for replay by the system. The realization of the system is a product of the present computer and digital communication technology; a read-write CD which adopts high technology is used as a storage medium, and multipath sound is recorded in file block modes. The system of the present invention has the advantages of good sound quality, convenient inquiry and search and long service life; besides, compared with similar products at home and aboard, the system has a high performance price ratio.

Description

Multichannel optical disk time sound recording system

The invention belongs to and a kind ofly utilize read-write CD as the multiplex digital speech of medium and the register system of time.

The record of multi-path voice and playback have two kinds of implementation methods: digital form and analog form.Analog form generally adopts the multiple magnetic head, and magnetic track divides path method record multi-path voice, magnetic head manufacturing technique requirent height, and the mechanical transmission mechanism complexity, except that external minority producer, the production of domestic impotentia still.The communication of Shenyang Air Force Headquarters is in the patent of invention of applying for " Ditital multichannel recording method and equipment " to Patent Office of the People's Republic of China on October 11st, 89, and the patent No. is 89105184.8.This digital form advanced technology, the speech quality height, but present this series products of producing both at home and abroad and using all adopts the medium of tape as record, and its disadvantage is that the speech playback is long retrieval time, tape and video recording head are short serviceable life, thereby influence the life-span and the reliability of total system.

The purpose of this invention is to provide a kind of multiplex digital optical disk time sound recording system that can write down ten six road above speeches, it can avoid above-mentioned deficiency.

The objective of the invention is to realize by the following method:

As shown in Figure 1:

Accompanying drawing 1 is multiplex digital optical disk time sound record, playback system block scheme.

AD: speech mould/transformation of variables, ten six tunnel

JC: speech has/no testing circuit

Q386: FEP 386 computing machines

QRAM1: speech I/O buffer area 1

QRAM2: speech I/O buffer area 2

FIFO: FEP is with the first in first out buffer of transmission data between main frame

H386: main frame 386 computing machines

CD: read-write CD drive

DA: speech steering D/A conversion, two tunnel

Consider the operating rate of microcomputer, this system configuration two computing machines (Q386, H386).

Q386 finishes the collection of voice signal, has opened up two buffer area QRAM1, QRAM2 within it in turn as the I/O buffer area.

H386 undertakes compression, storage, the playback work of voice signal.

Data transmission between the Q386 to H386 is finished by FIFO.

Narrate the course of work below;

The multi-path voice signal passes through AD separately, is transformed to digital signal.Q386 continuous acquisition speech digital signal and speech have/no signal, are stored in the input-buffer district, after waiting to expire, conversion input, output buffers district are had/no signal by the speech in the output buffers district, judge which road speech digital signal is effective, effectively promptly send the FIFO buffer memory, invalidly promptly abandon.The capacity of FIFO is the 1M byte.

After FIFO was full, requesting host read in the data among the FIFO, send CD to be recorded in the read-write CD after compression, and the speech digital signal is that the mode with blocks of files is stored on the CD, set up simultaneously one with blocks of files time corresponding retrieving files, be convenient to the output inquiry.

The playback of speech is the time of retrieving as requested, finds out the voice file piece of wanting corresponding from retrieving files, through DA playback output.

Provide an embodiment below, further specify the present invention in conjunction with the embodiments.

Embodiment: ten six tunnel digital optical disk time sound registering instruments

As shown in Figure 2,

Accompanying drawing 2 is ten six tunnel digital optical disk time sound recording section block schemes, and AD, JC, Q386, QRAM1, QRAM2, FIFO, H386, CD, DA are with accompanying drawing 1 among the figure.

SIN1-SIN16: ten six road speeches input

S/P: the serial/parallel change-over circuit of voice data, ten six tunnel.

P/S: the parallel/serial change-over circuit of voice data, two tunnel.

TIME: time information generating device

CRT: video display

KB: QWERTY keyboard

SOUT1, SOUT2: the output of two road speeches

Analog converter AD and speech that 16 road voice signal SIN1-SIN16 deliver to respectively separately have or not testing circuit JC, AD adopts Δ M coded system, under clock signal drove, AD had produced serial voice-data signal sequence, is converted to parallel signal through S/P, send the Q386 data bus to read in buffer memory among the QRAM by it, the JC circuit has or not according to voice signal, produces high-low level, for example: have words to be high level, do not have words for low level, read in buffer memory among the QRAM yet by Q386.

Q386 uses QRAM1 and QRAM2 in turn as the input and output buffer area, has guaranteed the continuity of input signal.QRAM1 and QRAM2 are divided into 16 again separately, corresponding 16 road speeches input, and each piece design stores voice signal time is 5 seconds, after 5 seconds, the input-buffer district is full, and Q386 judges the choice of blocks of speech according to the JC signal difference, if data promptly deposit in the fifo circuit useful, invalidly promptly abandon.The capacity of FIFO is the 1M byte.

When treating FIFO near max cap. (unlikely overflowing), send the interruption application to H386, H386 reads in data fifo by data bus, compressed processing, form a file and send among the CD and store, and the detection file corresponding with time and way according to the foundation of JC signal, in order to inquiry, playback.

Temporal information is extracted by the time generator TIME among the H386, and in system, the time is shown by CRT.

When the needs playback, H386 reads retrieving files, is presented on the CRT in the mode of menu, under KB control, selects playing time, playback passage.Computing machine is according to these command calculations corresponding file pieces, takes out and send P/S by dma mode, restores speech through DA, and CRT goes up the time that shows raw readings simultaneously.

Native system has two tunnel playbacks, any one tunnel in ten six road speeches of can resetting respectively.

The present invention and the patent No. are that 89105184.8 technology is compared, and the advantage that has is:

1, owing to utilize read-write CD as medium, the advantage that it brings is (1) Prolong the service life of CD and driver thereof, Reliability Enhancement, and (2) retrieval is quick and easy, (3) memory capacity of CD is big.

2, A/D and D/A adopt Δ M coding method, and its advantage is (1) coded number Rate is low, is convenient to big storage capacity, produces because voice-data signal disturbs in (2) decode procedure Speech disturb little.

Claims

1, a kind of multi-path voice and time keeping and playback system that utilizes read-write CD as medium, it is characterized in that: the multi-path voice people is number after mould/number conversion, send buffer memory in the speech I/O buffer of FEP 386, send into after buffer memory is full in the first in first out buffer of FEP with transmission data between main frame, the capacity of this first in first out buffer is the 1M byte, sending into main frame 386 after speech information is full is recorded on the CD, under the control of main frame, can be with the digital voice signal playback output behind D/A switch that is recorded on the CD.

2, multi-path voice and the time system of utilizing read-write CD as medium according to claim 1 is characterized in that: mould/transformation of variables and steering D/A conversion adopt Δ M coded system.

3, multi-path voice and the time system of utilizing read-write CD as medium according to claim 1, it is characterized in that: multi-path voice is ten six the tunnel.

4, multi-path voice and the time system of utilizing read-write CD as medium according to claim 1, it is characterized in that: (1) front-end computer and principal computer are 80386; (2) by 8 62128 FIFO that form the 1M byte.

5, multi-path voice and the time system of utilizing read-write CD as medium according to claim 1 is characterized in that; Native system has the two-way playback circuit.