Patent ID: 9654139
Date: 2017-05-16
CPC Classifications: H03M,H04N

Claim:
1. A method for decoding a bit stream associated with transform coefficients comprising: obtaining a bit steam; and determining whether to decode level information of a 4×4 block of a block from the bit stream using: a high throughput binarization mode and a bypass decoding mode, or selectively using a regular decoding mode and the bypass decoding mode, based on a value of a high throughput binarizaiton mode indicator in a header that is contained in the bit stream and corresponding to the 4×4 block, in response to determining that the value of the high throughput binarizaiton mode indicator is a first value, decoding a binary symbol corresponding to the 4×4 block from the bit stream by using the bypass decoding mode, de-binarizing the bypass decoded binary symbol by using the high throughput binarizaiton mode to obtain an input value, and deriving a sign and level information of the 4×4 block by mapping the obtained input value using a mapping table predefined; in response to determining that the value of the high throughput binarizaiton mode indicator is a second value that is different from the first value, decoding level information of the 4×4 block from the bit steam by selectively using the regular decoding mode and the bypass decoding mode.