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Embedded real-time video decompression algorithm and architecture for HDTV applications

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1 Author(s)
Neogi, R. ; Motorola Inc., Austin, TX, USA

DCT/IDCT bared source coding and decoding techniques are widely accepted in HDTV systems and other MPEG based applications. In this paper, we propose a new direct 2-D IDCT algorithm bared on the parallel divide-and-conquer approach. The algorithm distributes computation by considering one transformed coefficient at a time and doing partial computation and updating as every coefficient arrives. A novel parallel and fully pipelined architecture with an effective processing time of one cycle per pixel for an N×N size block is designed to implement the algorithm. An unique feature of this architecture is that it integrates inverse-shuffling, inverse-quantization, inverse-source-coding, and motion-compensation into a single compact data-path. We avoid the insertion of a FIFO between the bit-stream decoder and decompression engine. The entire block of pixel values are sampled in a single cycle for post-processing after de-compression. Also, we use only (N/2(N/2+1))/2 multipliers and N2 adders

Published in:

Algorithms and Architectures for Parallel Processing, 1995. ICAPP 95. IEEE First ICA/sup 3/PP., IEEE First International Conference on  (Volume:1 )

Date of Conference:

19-21 Apr 1995