JPS6474883A - System for quantizing gain/shape vector - Google Patents

System for quantizing gain/shape vector

Info

Publication number
JPS6474883A
JPS6474883A JP23305287A JP23305287A JPS6474883A JP S6474883 A JPS6474883 A JP S6474883A JP 23305287 A JP23305287 A JP 23305287A JP 23305287 A JP23305287 A JP 23305287A JP S6474883 A JPS6474883 A JP S6474883A
Authority
JP
Japan
Prior art keywords
quantizers
stage
operated
encoding information
judging
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
JP23305287A
Other languages
Japanese (ja)
Other versions
JP2537245B2 (en
Inventor
Makiko Tanoue
Osamu Kawai
Kiichi Matsuda
Toshitaka Tsuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP23305287A priority Critical patent/JP2537245B2/en
Publication of JPS6474883A publication Critical patent/JPS6474883A/en
Application granted granted Critical
Publication of JP2537245B2 publication Critical patent/JP2537245B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Image Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To improve coding efficiency without transmitting side information to cause respective quantizers to be enable by judging encoding information from a preceding stage based on a prescribed threshold and providing a judging circuit to cause the correspondent quantizer to be operated/not-operated in correspondence to the respective quantizers after the second stage. CONSTITUTION:To a gain/shape vector quantizing system, quantizers A1-An are connected in multi-stage to obtain the error signal of the preceding step as an input and to include a gain shape quantizer in a first stage. Then, the respective encoding information are transmitted to a receiving side. The encoding information from the preceding step of this system are judged based on the prescribed threshold and judging devices J1-Jn are provided to cause the correspondent quantizers A1-An to be operated/not-operated in correspondence to the quantizers A2-An after a second stage. The quantizers A1-An of this system are vector quantizers and they have a code to be arranged in correspondence to a correlative value between picture elements with a code book. The judging devices J2-Jn judge index information as the encoding information of the preceding step based on the prescribed threshold.
JP23305287A 1987-09-17 1987-09-17 Gain / shape vector quantization method Expired - Fee Related JP2537245B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23305287A JP2537245B2 (en) 1987-09-17 1987-09-17 Gain / shape vector quantization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23305287A JP2537245B2 (en) 1987-09-17 1987-09-17 Gain / shape vector quantization method

Publications (2)

Publication Number Publication Date
JPS6474883A true JPS6474883A (en) 1989-03-20
JP2537245B2 JP2537245B2 (en) 1996-09-25

Family

ID=16949043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23305287A Expired - Fee Related JP2537245B2 (en) 1987-09-17 1987-09-17 Gain / shape vector quantization method

Country Status (1)

Country Link
JP (1) JP2537245B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0332116A (en) * 1989-06-28 1991-02-12 Nec Corp Quantizer and inverse quantizer
JPH0386849U (en) * 1989-12-25 1991-09-03
JPH03248624A (en) * 1990-02-27 1991-11-06 Toshiba Corp Vector quantization system
JPH06120841A (en) * 1992-10-02 1994-04-28 Nippon Telegr & Teleph Corp <Ntt> Multistage vector quantization method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0332116A (en) * 1989-06-28 1991-02-12 Nec Corp Quantizer and inverse quantizer
JPH0386849U (en) * 1989-12-25 1991-09-03
JPH03248624A (en) * 1990-02-27 1991-11-06 Toshiba Corp Vector quantization system
JPH06120841A (en) * 1992-10-02 1994-04-28 Nippon Telegr & Teleph Corp <Ntt> Multistage vector quantization method

Also Published As

Publication number Publication date
JP2537245B2 (en) 1996-09-25

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Legal Events

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