Speech coding method

Details Speech coding method Speech coding method

1998-03-11

1999-10-19

Wieland, Susan

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704222, G10L 914

Patent

active

059704446

ABSTRACT:
An ACELP speech coding method according to ITU-T Recommendation G.729. When coding a random component vector, each of random component vector forming together the random codebook is formed of three or less pulses having a unit amplitude for each 6f a pair of subframes which form together a frame. The positions of the pulses are determined from a plurality of predetermined positions which a pulse can assume in a subframe so that distortion is minimized. The method allows speech coding at a lower bit rate.

REFERENCES:
patent: 5732389 (1998-03-01), Kroon et al.
patent: 5781881 (1998-07-01), Stegmann
patent: 5826226 (1998-10-01), Ozawa
Kataoka, A., et al., "LSP and Gain Quantization for CS-ACELP Speech Coder," NTT Review, vol. 8, No. 4, Jul. 1996, pp. 30-35.
Kataoka, A., et al., "Improved CELP-Based Coding in a Noisy Environment Using a Trained Sparse Conjugate Codebook," IEICE Transactions on Information and Systems, vol. E79-D, No. 2, Feb. 1996, pp. 123-129.
Kataoka, A., et al., "UTU-T 8-kbit/s Standard Speech Code for Personal Communication Services," IEEE International Conference on Universal Personal Communications, Nov. 6-10, 1995, pp. 818-822.
Kataoka, A., et al., "A 6.4-kbit/s Variable-Bit-Rate Extension to the G.729 (CS-ACELP Speech Coder," ICEICE Transactions on Information and Systems, vol. E80-D, No. 12, Dec. 1997, pp. 1183-1189.

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