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  Model based speech coder-decoder (LPC MBE vocoder)
   

Model based speech Codec working at 2400 bps

Salient features:

  • Input Data Stream: 16 bit PCM data at 9.6 ksps = 153.6 kbps
  • Output Data Stream: 2400 bps
  • Compression Ratio: 64:1
  • Single ADSP-21062 SHARC 32-bit floating point processor implementation
  • LPC components:
    • Fast pitch estimation
    • Long term envelope detection
  • MBE component:
  • Harmonic magnitude estimation in several frequency bands

Specific benefits to customer:

  • Achievement of 2.4 kbps speech codec (State-of-the-art)
  • Total partnership in suggesting and implementing user's hardware changes.
Sample Original Sound Compressed/Decompressed Output
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Best viewed at 1024 X 768 resolution.
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