Patent ID: 7573951

Claim:
A binary arithmetic decoding method comprising: receiving in a binary arithmetic decoder, a coded bit stream; generating a first decoded bit and a first set of decoding parameters using a previously generated set of decoding parameters; generating a second decoded bit and a second set of decoding parameters using the first set of decoding parameters; determining whether the first decoded bit is a last bit of a syntax element; a˜ selecting from among the first set of decoding parameters and the second set of decoding parameters for generation of subsequent decoded bits based on the determination of whether the first decoded bit is a last bit of a syntax element, wherein selecting from among the first set of decoding parameters and the second set of decoding parameters for generation of subsequent decoded bits based on the determination of whether the first decoded bit is a last bit of a syntax element comprises not using a context and a decoding interval determined in generating the second decoded bit in generating the subsequent decoded bits; and using decoding interval parameters from the first set of decoding parameters to generate a third decoded bit if the first decoded bit is a last bit of a syntax element.