Patent ID: 8351500
Filing Date: 2013-01-08
Classification: H03M,H04N

Abstract:
1. An entropy encoder comprising: a binarizer for converting the input code data into a binary string according to the sequence defined for a moving image data compression coding system; a switch for receiving the binary string obtained as a result of the conversion by the binarizer as input and outputting a symbol of the binary string; an arithmetic coding unit for receiving the symbol of the binary string output from the switch as input and outputting the bit stream obtained as a result of entropy coding; a context updater for supplying a most probable symbol and a state number corresponding to the symbol of the binary string supplied to the arithmetic coding unit to the arithmetic coding unit; an arithmetic unit for receiving a quantization parameter as input and outputting a slice quantization parameter obtained by subtracting a predetermined quantization parameter offset from the input quantization parameter, the slice quantization parameter being smaller than the quantization parameter by the predetermined quantization parameter offset; and a context initializer for receiving the slice quantization parameter output from the arithmetic unit and initializing the context updater at the head of a slice that is a decoding unit of a code at the time of entropy coding.