Adaptive variable length coding of digital video
AssigneeNokia Corporation
InventorMarta Karczewicz
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Abstract
The invention relates to a method of adaptive variable length coding in which a set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than the first value are represented by variable length codewords. According to the invention, at least one characteristic of the variable length coding applied to the data symbols is adapted according to the second number of data symbols which have values other than the first value. The invention also relates to a corresponding method of variable length decoding, as well as an encoder and decoder which implement the variable length coding and decoding methods according to the invention.
Claims43
A method of variable length coding a set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than said first value, wherein at least one characteristic of the variable length coding applied to the data symbols is adapted according to said certain second number of data symbols which have values other than the first value.
An encoder for variable length coding a set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than said first value, wherein the encoder is arranged to adapt at least one characteristic of the variable length coding applied to the data symbols according to said certain second number of data symbols which have values other than the first value.
A decoder for variable length decoding variable length codewords representing a set of data symbols, said set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than said first value, wherein the decoder is arranged to adapt at least one characteristic of the variable length decoding applied to the variable length codewords according to an indication of the second number of data symbols in said set of data symbols.
Dependencies are inferred from the claim text.