| 摘要 |
Intended is to obtain a video encoding device, a video encoding method, and a video encoding program which enable to prevent reduction in compression efficiency caused by drastic changes in symbol occurrence probabilities in context adaptive coding, and a video decoding device, a video decoding method and a decoding program corresponding thereto. The video data 101 is input into video encoding device on a macroblock basis, and after quantization, the PCM determination unit 139 determines whether the coded data 123 is PCM mode or not. Even when the coded data 123 is PCM mode, the context updating unit 301 executes context updating processing so as to improve efficiency of binary arithmetic coding. According to the determination of PCM mode or non PCM mode, the third switch 148 supplies either binary arithmetic coding output or PCM coding output as its output data. |
