Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-06-12
2000-08-08
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704200, G10L 1900
Patent
active
061014656
ABSTRACT:
A memory-efficient system and method for generating data blocks "on demand" for TDMA data bursts. In one embodiment of the present invention, a GSM transmitter module converts forward error correction (FEC) coded full-rate speech frames into TDMA data blocks. The transmitter module includes a memory configured to store the FEC coded frames in a current frame buffer and a previous frame buffer, an address generator configured to generate addresses of words in the current frame buffer during even clock cycles and addresses of words in the previous frame buffer during odd clock cycles. To generate the word addresses, the address generator operates on word offsets provided by a bit position generator, which also generates intra-word bit offsets. The memory provides the data words requested by the address generator to a multiplexer, which the selects a bit from each of the data words as indicated by the intra-word bit offsets from the bit position generator. The stream of bits from the multiplexer forms the bit reordered and frame interleaved data for the data blocks.
REFERENCES:
patent: 5084891 (1992-01-01), Ariyavisitakul et al.
patent: 5603081 (1997-02-01), Raith et al.
Global System for Mobile Communications' Technical Specification 05.03 (GSM 05.03) Digital cellular telecommunications system (Phase 2+) ; Channel coding: version 5.1.0, May 1996, pp. 1-31.
Bharath Jagannathan
Sawan Tony E.
Sazzad Sharif M.
Advanced Micro Devices , Inc.
Dorvil Richemond
Hood Jeffrey C.
Krueger Daniel J.
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