Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1994-05-25
1996-12-03
Tung, Kee M.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
395 235, 395 233, 395 229, 381 36, 381 37, 379406, 379410, G10L 900
Patent
active
055816541
ABSTRACT:
Pre-echo in the encoding and encoding of digital audio signals is diminished by utilizing a frequency dividing circuit for dividing the input audio signals into plural bands, normalization circuits for normalizing the frequency components for each frequency band and quantization circuits for an quantizing output of the normalization circuits. The frequency dividing circuit includes a unit for detecting a position in the signal waveform in which the quantization noise not masked by the signal components, that is the pre-echo, is estimated to be generated for producing the signal suppressing information. This signal suppressing information is also quantized as is the quantized output.
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Sony Corporation
Tung Kee M.
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