Audio and video processing apparatus
a technology of audio and video processing and processor chip, which is applied in the direction of color television with bandwidth reduction, selective content distribution, television systems, etc., can solve the problems of increasing the cost and number of chips, the mpeg-2 decoder chip does not support the latest compression standards and algorithms, and the audio/video standards are evolving at a fast pace, so as to achieve efficient and configurable data communication.
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[0049]The present invention uses four processors on a single semiconductor chip, each to implement separate functionality, as shown in Table 1. The advantage of using separate processors is that there is no need for time-consuming overhead of task switching, and therefore the efficiency is higher. Also, the implementation is much simpler. Each processor is a C programmable RISC type processor that is well proven with stable development tools. Each processor's clock speed is independently controlled to match the processing capabilities needed, dynamically or statically, and for power consumption reduction the clock rate is reduced under software control.
[0050]The unified memory, external or internal to the semiconductor chip, stores all processors' instruction memory, and all data that is buffered between processors and for input / output ports. Unified memory is typically a SDRAM, which is connected to the on-chip memory controller. Upon startup, the Flash memory containing program in...
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