CA2185322A1 - Vector transform coder with multi-layered codebooks and dynamic bit allocation - Google Patents

Vector transform coder with multi-layered codebooks and dynamic bit allocation

Info

Publication number
CA2185322A1
CA2185322A1 CA002185322A CA2185322A CA2185322A1 CA 2185322 A1 CA2185322 A1 CA 2185322A1 CA 002185322 A CA002185322 A CA 002185322A CA 2185322 A CA2185322 A CA 2185322A CA 2185322 A1 CA2185322 A1 CA 2185322A1
Authority
CA
Canada
Prior art keywords
vector transform
layered
codebooks
dynamic bit
bit allocation
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
CA002185322A
Other languages
French (fr)
Other versions
CA2185322C (en
Inventor
Weiping Li
Ya-Qin Zhang
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.)
Verizon Laboratories Inc
Original Assignee
Weiping Li
Ya-Qin Zhang
Gte Laboratories Incorporated
Verizon Laboratories Inc.
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
Priority claimed from US08/223,206 external-priority patent/US5521988A/en
Application filed by Weiping Li, Ya-Qin Zhang, Gte Laboratories Incorporated, Verizon Laboratories Inc. filed Critical Weiping Li
Publication of CA2185322A1 publication Critical patent/CA2185322A1/en
Application granted granted Critical
Publication of CA2185322C publication Critical patent/CA2185322C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/008—Vector quantisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

In a vector transform coding (VTC) scheme for image and video compression, a multi-layered codebook structure and a dynamic bit-allocation scheme in the vector transform domain are employed. The main advantage of this technique is that distortion is controlled by dynamically allocating more bits to vectors causing larger distortions and less bits to vectors causing smaller distortions.
CA 2185322 1994-04-05 1995-04-04 Vector transform coder with multi-layered codebooks and dynamic bit allocation Expired - Lifetime CA2185322C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/223,206 US5521988A (en) 1994-04-05 1994-04-05 Vector transform coder with multi-layered codebooks and dynamic bit allocation
US08/223,206 1994-04-05
PCT/US1995/004142 WO1995027261A1 (en) 1994-04-05 1995-04-04 Vector transform coder with multi-layered codebooks and dynamic bit allocation

Publications (2)

Publication Number Publication Date
CA2185322A1 true CA2185322A1 (en) 1995-10-12
CA2185322C CA2185322C (en) 2007-07-03

Family

ID=38247130

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2185322 Expired - Lifetime CA2185322C (en) 1994-04-05 1995-04-04 Vector transform coder with multi-layered codebooks and dynamic bit allocation

Country Status (1)

Country Link
CA (1) CA2185322C (en)

Also Published As

Publication number Publication date
CA2185322C (en) 2007-07-03

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Effective date: 20150407