摘要:
A moving image coded string is mapped with a set of information areas as one packet, and each packet is added with an error code and control information in a multiplexing part so that it is decided at the receiving side, from the result of error detection by decoding the error detection code, whether an error has occurred in each information area of the packet.
摘要:
A moving image coded string is mapped with a set of information areas as one packet, and each packet is added with an error code and control information in a multiplexing part so that it is decided at the receiving side, from the result of error detection by decoding the error detection code, whether an error has occurred in each information area of the packet.
摘要:
An image decoding device is provided which performs expansion processing and reverse orthogonal conversion in fixed block units with respect to image compression data. The image decoding device is provided with an error block detection means (error block detection section 4) which receives a threshold value and an image signal in frequency domains, which determines whether or not an error is contained in block data based on the threshold value and the image signal in the frequency domain and which outputs a detection state in the block data.
摘要:
A moving image coded string is mapped with a set of information areas as one packet, and each packet is added with an error code and control information in a multiplexing part so that it is decided at the receiving side, from the result of error detection by decoding the error detection code, whether an error has occurred in each information area of the packet.
摘要:
A lateral directional difference calculating unit 21 calculates a change degree between pixel levels of pixels adjacent to each other through a boundary of a decoded block and a block adjacent to the decoded block in a lateral direction and calculates a change degree between pixel levels of pixels placed in the block adjacent to the decoded block in the lateral direction, a lateral directional continuity judging unit 23 judges the continuity between the decoded block and the block adjacent to the decoded block in the lateral direction. A longitudinal directional difference calculating unit 22 and a longitudinal directional continuity judging unit 24 are operated in the same manner, a block continuity judging unit 25 judges the continuity between the decoded block and each block adjacent to the decoded block, and an error macro-block judging unit 26 detects an error macro-block according to a judging result of the block continuity judging unit 25.
摘要:
A method and system for predicting a moving picture to be implemented in an encoder is provided. The system includes a plurality of reference picture memory areas for storing reference pictures to be used for prediction and a prediction generation section that includes a motion compensator and memory updater. The motion compensator receives a parameter representing the motion between an image to be predicted and a reference picture stored in the reference picture memory area and a parameter representing the reference picture memory area to be used for prediction, and generates a predicted image by using the reference picture stored in the reference picture memory area indicated by the parameter representing the reference picture memory area. The memory updater carries out dynamic allocation of reference picture memory areas required for prediction and judges whether to store new reference pictures additionally.
摘要:
An image decoding device and method analyzes a parameter of the encoded bit stream to restore a 1-bit information to indicate that temporal distance between any two successive video frames to be displayed is constant in the video sequence, the 1-bit information being analyzed prior to a decoding process for a data area representing the video frames, A VOP decoder decodes a VOP that is image data serving as an encoding unit of video object and a VOL header analyzing part decodes a VOP rate flag, contained in encoded form in a header information part of a VOL layer composed of several VOPs, for indicating that a display rate in the VOL of the VOP to be decoded by the VOP decoder is a fixed rate by the VOP rate flag only.
摘要:
To achieve an encoding system including a highly efficient prediction performed in response to the content of a scene, a significance, and a motion characteristic of a moving picture and the like, a reference memory, a motion compensator receiving a parameter representing the motion of a prediction picture segment for generating a predicted picture by using arbitrary data stored in the memory based upon the parameter, and memory update unit that updates picture data in memory and controls the capacity of the memory, are provided.
摘要:
An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a second coding scheme in accordance with header information in a first coding scheme, and a decoder for decoding image coded data in the first coding scheme in response to the header information on the second coding scheme, which is set.
摘要:
An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a second coding scheme in accordance with header information in a first coding scheme, and a decoder for decoding image coded data in the first coding scheme in response to the header information on the second coding scheme, which is set.