Patent
Lossless audio coder
John C. Hardwick
- 05 Jan 2001
44
TL;DR: In this article, a lossless coding method was used to compress information, such as audio data, without introducing any artifacts, which can be used in storage and/or transmission of audio data.
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Abstract: A lossless coding method may be used to compress information, such as audio data, without introducing any artifacts. This lossless coding method may be used to compress audio signals for use in storage and/or transmission of audio data. The audio data may be compressed by first dividing digital samples taken from the audio data into frames. A predictor is then used on the frames to generate prediction coefficients that can then be quantized to form predictor bits. The frames may then be subdivided into subsets. Another predictor can be used on the subsets to produce error samples that can be entropy coded into codeword bits. The predictor bits and codeword bits can be included in the compressed audio output for use in decoding.
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Citations
Patent
Lossless multi-channel audio codec
Zoran Fejzo
- 21 Mar 2005
TL;DR: In this article, a lossless audio codec segments audio data within each frame to improve compression performance subject to a constraint that each segment must be fully decodable and less than a maximum size.
99
Patent
Mixed lossless audio compression
Wei-ge Chen,Chao He +1 more
- 03 Sep 2003
TL;DR: In this article, mixed lossless audio compression has been proposed to combine lossy and lossless compression within a same audio signal, which can then be used for frames that exhibit poor compression performance.
97
Patent
Unified lossy and lossless audio compression
Wei-ge Chen,Chao He +1 more
- 14 Jul 2003
TL;DR: In this paper, a unified lossy and lossless audio compression scheme was proposed, which combines lossy audio compression within a same audio signal, and employs mixed lossless coding of a transition frame between lossy coding frames to produce seamless transitions.
87
Patent
Digital signal coding and decoding methods and apparatuses and programs therefor
Takehiro Moriya,Akio Jin,Takeshi Mori,Kazunaga Ikeda +3 more
- 23 Aug 2002
TL;DR: In this paper, bits of each frame of an input digital signal are concatenated every digit common to the samples across each frame to generate equi-order bit sequences, which are output as packets.
77
Patent
Lossless multi-channel audio codec using adaptive segmentation with random access point (rap) and multiple prediction parameter set (mpps) capability
Fejzo Zoran
- 09 Jan 2009
TL;DR: In this paper, an adaptive segmentation technique that fixes segment start points based on constraints imposed by the existence of a desired RAP and/or detected transient in the frame and selects a optimum segment duration in each frame to reduce encoded frame payload subject to an encoded segment payload constraint
62
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