IC card with built-in voice synthesizing function

Details IC card with built-in voice synthesizing function IC card with built-in voice synthesizing function

1992-01-30

1994-06-28

MacDonald, Allen R.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

395 276, 381 51, G10L 502

Patent

active

053254635

ABSTRACT:
An IC card with a built-in voice synthesizing function is provided which includes a solid-state memory containing vector-quantized coded data, a pattern generating means for generating patterns each composed of a prescribed number of digital data by repeatedly performing calculations using a recurrence equation with initial values given by coded data read out of the solid-state memory, a converter circuit for limiting the band of each pattern generated by the pattern generating means and converting into an analog voice signal, and a gain control circuit for adjusting the gain of the analog voice signal output from the converter circuit on the basis of gain data read out of the solid-state memory.

REFERENCES:
patent: 4354056 (1982-10-01), Brantingham et al.
patent: 4635211 (1987-01-01), Yoshida et al.
patent: 4926463 (1990-05-01), Ukegawa
Gersho; IEEE Global Telecommunications Conference 83, vol. 1; Nov. 1983; "Speech Waveform Coding Using Vector Quantization;" pp. 193-197.
Chen et al.; IEEE International Conference on Communications; vol. 3, vol. 3; Jun. 1985; "Gain-Adaptive Vector Quantization for Medium-Rate Speech Coding;" pp. 1456-1460.
Davidson et al.; IEEE Journal on Selected Areas in Communications; vol. 4, No. 1; Jan. 1986; "Application of a VLSI Vector Quantization Processor to Real-Time Speech Coding;" pp. 112-124.

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