Abstract: The method and system for data transfer between the master device and the slave device through the bus are presented.

Abstract: The present invention provides an arbiter and its arbitration method. The master devices in the bus system can be divided into primary master devices and secondary master devices. Said arbiter has first and second stage arbitration modules, wherein the second stage arbitration module can be used for arbitrating bus usage requests sent by secondary master devices, and the first stage arbitration module can be used for arbitrating the arbitrated result of the second stage arbitration module and bus usage requests sent by primary master devices together, so that it can set arbitrating opportunity against different bus usage requests so as to raise arbitration efficiency and bus usage efficiency. The arbiter also provides reverse arbitration ability, which can avoid the conflict among returning data based on improving the bus usage efficiency.

Abstract: The invention discloses a method for mapping picture addresses in a memory, such that decoded picture data can be mapped in corresponding address in a memory. The memory comprises at least two memory arrays, each of which comprises multiple memory rows. The mapping method comprises the following steps: dividing one picture frame into multiple rectangle macroblocks; providing a memory for storing picture data and setting integral neighbor macroblocks of an picture frame as one mapping unit; one by one, the mapping units of picture data are consecutively mapped into the memory in the order of left to right in horizontal directions and up to down in vertical directions; mapping at least one mapping unit of picture data into the same memory row of the same memory array until the said memory row is full; switching the memory array and mapping the adjacent next mapping unit of picture data. The above steps are repeated until completing the mapping of one picture frame.

Abstract: The method and system for data transfer between the master device and the slave device through the bus are presented.

Abstract: The present invention provides an arbiter and its arbitration method. The master devices in the bus system can be divided into primary master devices and secondary master devices. Said arbiter has first and second stage arbitration modules, wherein the second stage arbitration module can be used for arbitrating bus usage requests sent by secondary master devices, and the first stage arbitration module can be used for arbitrating the arbitrated result of the second stage arbitration module and bus usage requests sent by primary master devices together, so that it can set arbitrating opportunity against different bus usage requests so as to raise arbitration efficiency and bus usage efficiency. The arbiter also provides reverse arbitration ability, which can avoid the conflict among returning data based on improving the bus usage efficiency.