MPEG-2 decoder implementation on MAP1000A media processor using the C language

Woobin Lee; Chris Basoglu

doi:10.1117/12.375242

29 December 1999 MPEG-2 decoder implementation on MAP1000A media processor using the C language

Woobin Lee, Chris Basoglu

Proceedings Volume 3970, Media Processors 2000; (1999) https://doi.org/10.1117/12.375242
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

Mediaprocessors offer several advantages over hardwired MPEG-2 decoder chips, such as the capability to perform multiple functions, update the algorithms and customize the system with enhanced features. MAP1000A is a highly integrated mediaprocessor platform with multiple processing units for parallel processing. The input bitstream is parsed and decoded by the VLX coprocessor, which is a small and fast processor designed for sequential operations. The decoded information is then passed to the VLIW Core that performs the pixel-intensive operations such as the inverse quantization, inverse DCT, half-pel interpolation, pixel averaging, and pixel addition. The VLIW Core's two-cluster architecture with 128-bit data path per cluster and partitioned operations achieves a high throughput on 8-bit and 16-bit pixel operations. Also, to avoid the VLIW Core from waiting for data, a dedicated data transfer engine called Data Streamer moves data between MAP1000A, external memory, and I/O devices in parallel with the VLIW Core's execution. The MPEG-2 video decoder on MAP1000A is written entirely in the C language, which is a significant advantage over previous processors which required assembly-language programming. At 220 MHz clock frequency, the MPEG-2 decoder takes less than 40% of the MAP1000A's cycles. Two MPML streams can be decoded simultaneously in real time, with enough cycles remaining to perform other tasks such as the audio and system decoding.

Citation Download Citation

Woobin Lee and Chris Basoglu "MPEG-2 decoder implementation on MAP1000A media processor using the C language", Proc. SPIE 3970, Media Processors 2000, (29 December 1999); https://doi.org/10.1117/12.375242

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