A low-bit-rate video codec using block-list-transform

Hsueh-Ming Hang, Barry G. Haskell, Robert L. Schmidt, James C. Candy

Research output: Contribution to journalArticlepeer-review


A simple but efficient video codec is built for low-bit-rate videophone applications. The goal of this project is to construct a video codec at a low cost and good performance. In order to reduce hardware complexity, a simple interframe predictive coding structure is selected. The input pictures are partitioned into 2-D blocks, and only the blocks with significant frame differences are coded and transmitted to the decoder. The Block-list-transform (BLT) coding algorithm, a generalized DPCM, is used to encode the frame differences between the previously reconstructed picture and the current picture. Preliminary results using this coding system at 64 kbits/sec show reasonable coding performance on typical videophone sequences.

Original languageEnglish
Pages (from-to)1599-1606
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1 Nov 1989


  • Digital signal processing
  • Computer programming
  • Image processing
  • Video
  • Quantization
  • Very large scale integration
  • Visual communications
  • Video processing
  • Chromium
  • RGB color model


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