TW367661B - DPCM CODAC with compression control function - Google Patents

DPCM CODAC with compression control function

Info

Publication number
TW367661B
TW367661B TW087111184A TW87111184A TW367661B TW 367661 B TW367661 B TW 367661B TW 087111184 A TW087111184 A TW 087111184A TW 87111184 A TW87111184 A TW 87111184A TW 367661 B TW367661 B TW 367661B
Authority
TW
Taiwan
Prior art keywords
dpcm
length code
length
codac
code
Prior art date
Application number
TW087111184A
Other languages
Chinese (zh)
Inventor
Chung-Yen Chiu
Original Assignee
Ind Tech Res Inst
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 Ind Tech Res Inst filed Critical Ind Tech Res Inst
Priority to TW087111184A priority Critical patent/TW367661B/en
Application granted granted Critical
Publication of TW367661B publication Critical patent/TW367661B/en

Links

Landscapes

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

Abstract

A kind of DPCM CODAC which is composed of a DPCM encoder and a DPCM decoder. The DPCM encoder comprises a DPCM module, a compression controller, an entropy encoder and a bit packer. The DPCM module is used to receive an input data and output a quantization index after processing. The compression controller calculates the code length difference between a fixed-length code and a variable-length code based on the quantization index and output an indication signal. The entropy encoder is used to process the fixed-length code to variable-length code then output. The bit packer selects the smaller code length between the fixed-length code and variable-length code based on the indication signal and proceed packaging.
TW087111184A 1998-07-10 1998-07-10 DPCM CODAC with compression control function TW367661B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW087111184A TW367661B (en) 1998-07-10 1998-07-10 DPCM CODAC with compression control function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW087111184A TW367661B (en) 1998-07-10 1998-07-10 DPCM CODAC with compression control function

Publications (1)

Publication Number Publication Date
TW367661B true TW367661B (en) 1999-08-21

Family

ID=57941279

Family Applications (1)

Application Number Title Priority Date Filing Date
TW087111184A TW367661B (en) 1998-07-10 1998-07-10 DPCM CODAC with compression control function

Country Status (1)

Country Link
TW (1) TW367661B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8509553B2 (en) 2009-01-07 2013-08-13 Industrial Technology Research Institute DPCM-based encoder, decoder, encoding method and decoding method
TWI407794B (en) * 2009-11-17 2013-09-01 Alpha Imaging Technology Corp Data compression method and data compression system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8509553B2 (en) 2009-01-07 2013-08-13 Industrial Technology Research Institute DPCM-based encoder, decoder, encoding method and decoding method
TWI407794B (en) * 2009-11-17 2013-09-01 Alpha Imaging Technology Corp Data compression method and data compression system

Similar Documents

Publication Publication Date Title
EP0771120A3 (en) Video encoding and decoding apparatus
SG170613A1 (en) Dct compression using golomb-rice coding
EP0951184A4 (en) Method for converting digital signal and apparatus for converting digital signal
TW358290B (en) Encoder, encoding method and saving/transmission device for conversion of image data into images of instant amount and variable lengths
KR100335138B1 (en) Video encoder's variable encoder and coding method using it
EP0750427A3 (en) Signal compression and/or expansion devices
CA2156889A1 (en) Method and Apparatus for Encoding and Decoding Data
CA2128127A1 (en) Method and system for data compression
MY122320A (en) Constant bitrate real-time lossless audio encoding and decoding by moving excess data amounts
EP1400954A3 (en) Entropy coding by adapting coding between level and run-length/level modes
WO1999053677A3 (en) Lossless encoding/decoding in a transmission system
WO1999048212A3 (en) Arithmetic encoding/decoding of a multi-channel information signal
CA2157066A1 (en) Method for Controlling a Compressed Data Buffer
CA2374389A1 (en) Lzw data compression/decompression apparatus and method with embedded run-length encoding/decoding
EP1223677A3 (en) Data compression and related control method
EP0692913A3 (en) Digital coding/decoding apparatus using variable length codes
ES8406019A1 (en) Facsimile data converting system.
WO1998056116A3 (en) Data compression and expansion of an in-level information signal
JPS542050A (en) Block coding and decoding system
TW367661B (en) DPCM CODAC with compression control function
EP1136986A3 (en) Audio datastream transcoding apparatus
EP0229379A3 (en) Digital picture signal coding/decoding circuit
JPS55134576A (en) Still picture transmission system
EP0340041A3 (en) Start, step, stop unary coding for data compression
WO2002060067A3 (en) A method of data compression

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees