39results about How to "Reduce encoding overhead" patented technology

The embodiment of the invention discloses a coding method, a coding device, a decoding method, a decoding device, a coding system and a decoding system. The coding method comprises the following steps that: a coder acquires data to be coded, wherein the data to be coded is at least one largest coding unit (LCU); the coder determines a quantization depth parameter of the LCU according to a code rate control algorithm, and writes the quantization depth parameter into the data to be coded; the coder determines a quantization parameter (QP) of each CU according to a minimum image block dimension and the dimension of each CU in the LCU; the coder calculates a QP difference of each CU according to the QP and a QP predicted value of the CU; for each CU consistent with a preset condition, the coder carries the QP difference of the CU into the CU; and the coder codes the quantization depth parameter, the QP difference of the CU consistent with the preset condition and each CU to obtain a code stream. The embodiment of the invention also provides the decoding method, the coding device and the decoding device. By the embodiment of the invention, code rate control accuracy and compression efficiency can be effectively improved.

Provided in an embodiment of the present invention are a target image block decoding and encoding method, and a decoder and encoder. The decoding method comprises: obtaining predictive information of a target color palette from the received data rate of the target image block; determining the set of matching elements in the color palette template according to the predictive information; determining the set of target elements according to the predictive information and the set of the matching elements; and decoding the target image block according to the set of the target elements. The embodiment of the present invention predictively encodes the target color palette using for example the predictive information to reduce encoding overhead of the target color palette, thus improving compression efficiency of video images employing the multi-stage BCIM-based scheme.

The invention relates to a fountain code coding and decoding method for eliminating short loops and belongs to the technical field of communication. The fountain code coding and decoding method includes: firstly, coding short-code length fountain codes at a transmitting end; secondly, generating fountain codes obtained at a receiving end at the unsuccessful decoding time into a matrix; thirdly, comparing columns of the matrix to obtain an array I and feeding the array I back to the transmitting end; fourthly, finding information source symbols corresponding to n2 element values in the array I sequentially from large to small as coding symbols, and directly transmitting the coding symbols to the receiving end for decoding participation; and finally, enabling the receiving end to use n1 coding symbols received in the step 1 and the n2 coding symbols in the step 4 to eliminate the short loops so that decoding is completed. By the fountain code coding and decoding method for eliminating the short loops, the decoding rate of the short-code length fountain codes is increased greatly, and high-probability decoding of the fountain codes with low coding expenditures is achieved.

The invention discloses a coding block adaptive adjusting method oriented to a coding transmission protocol. In the coding transmission protocol, sizes of coding blocks are adjusted adaptively to obtain an optimized coding block size through which a highest transmission throughput is achieved in a transmission process. The method has the advantages of lowering a complexity and a coding overhead, increasing a data transmission performance, and the like.