FIELD: information technology.
SUBSTANCE: disclosed are a context-based arithmetic encoding apparatus and method and a context-based arithmetic decoding apparatus and method. The context-based arithmetic decoding apparatus may determine a context of a current tuple of N elements to be decoded, determine a most significant bit (MSB) context corresponding to an MSB symbol of the current tuple of N elements, and determine a probability model using the context of the tuple of N elements and the MSB context. The context-based arithmetic decoding apparatus may then perform decoding for a MSB based on the determined probability model, and perform decoding for a least significant bit (LSB) based on a bit depth of the LSB derived from the decoding process for an escape code.
EFFECT: high efficiency of encoding and reducing the amount of memory required for encoding.
79 cl, 29 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| AUDIO ENCODER, AUDIO DECODER, METHOD OF ENCODING AUDIO INFORMATION, METHOD OF DECODING AUDIO INFORMATION AND COMPUTER PROGRAMME USING OPTIMISED HASH TABLE | 2011 |
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