Other

Alaris Inc.

Gt Technology

Boris Troyanovsky

Boris D Kudryashov

Victor D Kolesnik

Irina E Bocharova

Eugene Ovsyannikov

Andrei N Trofimov

Andrei Trofimov

A method and apparatus to achieve relatively high quality audio data compression/decompression, while achieving relatively low bit rates (e.g., high compression ratios). According to one aspect of the invention, a residual signal is subband decomposed and adaptively quantized and encoded to capture frequency information that may provide higher quality compression and decompression relative to transform encoding techniques. According to a second aspect of the invention, an input audio signal is compared to an encoded signal based on the input audio signal to detect and reduce, as necessary, distortion in the encoded signal or portions thereof.

Audio compression and decompression employing subband decomposition of residual signal and distortion reduction

A method and apparatus for compression and decompression of an audio signal. In encoding an input audio signal, at least a portion of the audio signal is transformed into a set of coefficients. A set of binary vectors associated with the set of coefficients are generated for digitizing the transformed audio signal using a fixed rate adaptive quantization. Information based on the set of binary vectors is combinatorially encoded and output as a bit stream of encoded audio data. The encoded audio data may be stored, transmitted, and/or decoded.

Method and apparatus for adaptive audio compression and decompression

Growing community of inventors

St. Petersburg, Russia

Boris Troyanovsky