JPS5454506A - Coding method - Google Patents

Coding method

Info

Publication number
JPS5454506A
JPS5454506A JP12165177A JP12165177A JPS5454506A JP S5454506 A JPS5454506 A JP S5454506A JP 12165177 A JP12165177 A JP 12165177A JP 12165177 A JP12165177 A JP 12165177A JP S5454506 A JPS5454506 A JP S5454506A
Authority
JP
Japan
Prior art keywords
level
circuit
probability
bit length
difference
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12165177A
Other languages
Japanese (ja)
Other versions
JPS6046859B2 (en
Inventor
Toshitada Doi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP52121651A priority Critical patent/JPS6046859B2/en
Publication of JPS5454506A publication Critical patent/JPS5454506A/en
Publication of JPS6046859B2 publication Critical patent/JPS6046859B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/4031—Fixed length to variable length coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE:To make easy synchronism and to enable to delivery of high fidelity, by setting the bit length depending on the probability of occurrence per a given time of the level of the sampling time difference before and after the audio signal. CONSTITUTION:After the audio signal is sampling-held 2, the difference between the value of sampling time and that before it is obtained at the subtraction circuit 7, and the difference is A/D converted 3 and is synchronizingly mixed 12 with the pulse from the timing control circuit 13 via the parallel serial conversion and uneven length conversion circuit 10 and buffer memory 11, and the variable length cade of the bit length corresponding to the output level of the circuit 7 is delivered. Furhter, the output level of the subtraction circuit 7 shortens the bit length with comparatively smaller level having greater probability of occurrence per a given time and makes longer with comparatively greater level having smaller probability, performing coding.
JP52121651A 1977-10-11 1977-10-11 Variable length coding serial transmission method Expired JPS6046859B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52121651A JPS6046859B2 (en) 1977-10-11 1977-10-11 Variable length coding serial transmission method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52121651A JPS6046859B2 (en) 1977-10-11 1977-10-11 Variable length coding serial transmission method

Publications (2)

Publication Number Publication Date
JPS5454506A true JPS5454506A (en) 1979-04-28
JPS6046859B2 JPS6046859B2 (en) 1985-10-18

Family

ID=14816516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52121651A Expired JPS6046859B2 (en) 1977-10-11 1977-10-11 Variable length coding serial transmission method

Country Status (1)

Country Link
JP (1) JPS6046859B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140737A (en) * 1983-02-01 1984-08-13 Kanda Tsushin Kogyo Kk Communication system by analog pulse modulation
JPS6199419A (en) * 1984-10-20 1986-05-17 Canon Inc Predictive encoding system
JPS62136132A (en) * 1985-12-10 1987-06-19 Hitachi Ltd Method and apparatus for modulating digital data
JPS62243494A (en) * 1986-04-16 1987-10-23 Canon Inc Coding system
JPH0383123A (en) * 1989-08-28 1991-04-09 Sumitomo Metal Ind Ltd Method for compressing measured data
US5758315A (en) * 1994-05-25 1998-05-26 Sony Corporation Encoding/decoding method and apparatus using bit allocation as a function of scale factor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140737A (en) * 1983-02-01 1984-08-13 Kanda Tsushin Kogyo Kk Communication system by analog pulse modulation
JPS6199419A (en) * 1984-10-20 1986-05-17 Canon Inc Predictive encoding system
JPS62136132A (en) * 1985-12-10 1987-06-19 Hitachi Ltd Method and apparatus for modulating digital data
JPS62243494A (en) * 1986-04-16 1987-10-23 Canon Inc Coding system
JPH0383123A (en) * 1989-08-28 1991-04-09 Sumitomo Metal Ind Ltd Method for compressing measured data
US5758315A (en) * 1994-05-25 1998-05-26 Sony Corporation Encoding/decoding method and apparatus using bit allocation as a function of scale factor

Also Published As

Publication number Publication date
JPS6046859B2 (en) 1985-10-18

Similar Documents

Publication Publication Date Title
JPS5454506A (en) Coding method
GB1421243A (en) Analysing data of a predetermined bit rate
GB2168577B (en) System for converting a voice signal to a pitch signal
JPS5461453A (en) Analog-digital conversion circuit
JPS5412664A (en) Pulse generating system
JPS5421248A (en) Companding system of delta-modulation data
JPS51119266A (en) Electronic timer device
JPS53121401A (en) Electronic channel selection unit
JPS52119276A (en) Delayed synchronizing pulse generator
JPS5267537A (en) Bit process method of digital electronic computer
JPS52116124A (en) Decoder circuit
JPS5649976A (en) Hour-striking device
JPS5333564A (en) Waveform sampling system
JPS51139243A (en) Logarithmic compression type converter
JPS51137338A (en) Magnetic bubble apparatus
JPS51143184A (en) One shot output circuit of digital programmer
JPS5792484A (en) Timing pulse generating circuit
JPS5299044A (en) Analogue memory circuit
JPS53133315A (en) Signal repeating equipment
JPS5413740A (en) Memory unit
JPS5284383A (en) Remote control system
JPS53144245A (en) Clock output circuit
JPS547514A (en) Voltage control circuit
EP0129327A3 (en) Timing signal generator
JPS5211382A (en) Output device of analogue signal