Lernout & Hauspie Speech and Music Coding Product Range

• Product name: L&H.smc650: 32kbps ADPCM Speech coding
  • Implementation of ADPCM 32 kbps based on CCITT G721 standard.
  • Estimated quality: 4.1 MOS (Mean Opinion Score)
  • Hardware Example: Analog Devices ADSP2101
  • Input / Output signal: A-Law or mu-Law PCM (64 kbps); Linear signal with up to 16 bits per sample; 8 kHz sampling rate
• Product name: L&H.smc550: LD-CELP 16 kbps speech coding
  • Proprietary implementation of LD-CELP 16 kbps based on CCITT G728 standard.
  • Estimated quality: 4.0 MOS (Mean Opinion Score)
  • Hardware Example: Motorola 5600X
  • Input / Output signal: A-Law or mu-Law PCM (64 kbps); Linear signal with up to 16 bits per sample; 8 kHz sampling rate
• Product name: L&H.smc450: 16-17.5 kbps speech coding
  • Estimated Quality: 3.9 MOS (Mean Opinion Score)
  • Hardware Examples: Analog Devices ADSP2101, Intel 486 DX2/66 MHz
  • Input / Output Signal: A-Law or mu-Law PCM (64 kbps); Linear signal with up to 16 bits per sample; 8 kHz sampling rate.
• Product name: L&H.smc350: 4.8-9.6 kbps speech coding
  • Proprietary CELP based software for compression rates of 4.8 kbps to 9.6 kbps
  • Estimated Quality: 3.5 MOS (Mean Opinion Score)
  • Hardware Examples: AT&T DSP32C
  • Input / Output signal: A-Law or mu-Law PCM (64 kbps); Linear signal with up to 16 bits per sample; 8 kHz or 11.025kHz sampling rate.
• Product name: L&H.smc250: 2.4 kbps speech coding
  • Combination of multi band excitation and code book excited linear prediction.
  • Estimated Quality: 3.0 MOS (Mean Opinion Score).
  • Hardware Examples: Intel 486 DX2/66 MHz, Analog Devices ADSP2101
  • Input signal: A-Law or mu-Law PCM (64 kbps); Linear signal with 12-15 bits per sample; 8 kHz sampling rate.
  • Output signal: A-Law or mu-Law PCM (64 kbps); Linear signal with 12-15 bits per sample; 8 kHz sampling rate.
• See also: L&H Speech Coding SDK
• More Information: On the WWW: http://www.lhs.com/coding.html
• Cost: Unknown
• Contact: Lernout and Hauspie Speech Products
  20 Mall Road, 4th Floor
  Burlington, MA 01803, USA
  Ph: +1-617-238-0960, Fax: +1-617-238-0986
  Email: sales@lhs.com
  WWW: http://www.lhs.com/

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