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On Pitch-Synchronous Abridgment of the Linear Prediction Residual.

Author: N D Smith; NAVAL RESEARCH LAB WASHINGTON DC.
Publisher: Ft. Belvoir Defense Technical Information Center 12 MAR 1982.
Series: NRL report, 8570.
Edition/Format:   Book : English
Database:WorldCat
Summary:
We developed an approach to abridging the short-term LPC residual and used the abridged information to generate speech at 9.6 to 16 kilobits per second (kb/s). This is an alternative to the baseband residual-excited coder now being used in NRL's Multirate Processor (MRP). The abridgment logic requires less than one multiply per input sample, is independent of voiced/unvoiced decisions, restricts the influence of  Read more...
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Document Type: Book
All Authors / Contributors: N D Smith; NAVAL RESEARCH LAB WASHINGTON DC.
OCLC Number: 227525227
Description: 24 p.
Series Title: NRL report, 8570.

Abstract:

We developed an approach to abridging the short-term LPC residual and used the abridged information to generate speech at 9.6 to 16 kilobits per second (kb/s). This is an alternative to the baseband residual-excited coder now being used in NRL's Multirate Processor (MRP). The abridgment logic requires less than one multiply per input sample, is independent of voiced/unvoiced decisions, restricts the influence of errors to a single frame, strongly resists brief input anomalies, and provides anchor periods of excellent speech reproduction once per frame. This approach appears promising for practical application in real-time systems where simplicity, stability, and quality are important. It scores somewhat lower overall on the Diagnostic Rhyme Test than the more complicated MRP approach. (Author).

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