• DocumentCode
    1009226
  • Title

    Conditional entropy encoding of log-PCM speech

  • Author

    Gharavi, Hamid ; Steele, R.

  • Author_Institution
    AT&T Bell Laboratories, Holmdel, USA
  • Volume
    21
  • Issue
    11
  • fYear
    1985
  • Firstpage
    475
  • Lastpage
    476
  • Abstract
    The conditional dependence between the current and previously quantised samples in 64 kbit/s ¿-law PCM speech is exploited to noiselessly reduce the average transmitted bit rate. From the conditional probabilities, the conditional entropy and average Huffman code word lengths were computed. The average data rate reduction for the first-order noiseless encoder was found to be 12 kbit/s.
  • Keywords
    analogue-digital conversion; data reduction; encoding; pulse-code modulation; speech analysis and processing; 64 kbit/s; average Huffman code word lengths; average data rate reduction; conditional entropy; first-order noiseless encoder; log-PCM speech; logarithmic pulse code modulation; probabilities; quantised samples;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19850337
  • Filename
    4251248
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1009226