Abstract:
인트라 예측 부호화 방법 및 부호화 방법, 그리고 상기 방법을 수행하는 인트라 예측 부호화 장치 및 인트라 예측 복호화 장치가 개시된다. 본 발명에 의하면, 이미 부호화되어 전송된 이웃한 주변 블록들을 이용하여 현재 블록에 대해 인트라 예측을 수행함으로써 인트라 예측 모드의 비트와 관련된 오버헤드를 감소시켜 압축률을 향상시킬 수 있다.
Abstract:
PURPOSE: An intra prediction encoding and decoding method and an intra prediction encoding and decoding apparatus implementing the method are provided to reduce overhead related to mode bit with the selection of a prediction mode through peripheral blocks. CONSTITUTION: A first intra prediction unit(111) respectively calculates the degree of pixel correlation by intra prediction direction between a macroblock and the peripheral blocks of the macroblock. A second intra prediction unit(113) performs the intra prediction of the macroblock with the mode information of the peripheral block in the upper part of the macro block. A third intra prediction unit(115) performs the intra prediction of the brightness component of a current picture. A mode selection unit(117) selects an optimal intra prediction mode.
Abstract:
PURPOSE: An encoding apparatus and method capable of multi-dimensional conversion and quantization and a decoding apparatus and method are provided to apply integer-type quantization to a difference image which is converted twice. CONSTITUTION: A first differentiator(140) removes a prediction block created by inter prediction and creates a difference image. A converting unit(151) performs the multi-dimensional conversion of the difference image. A quantization unit(153) applies integer-type quantization to the multi-dimensionally converted difference image. An entropy coding unit(157) encodes and compresses the coefficient values of the re-aligned difference image.