An efficient architecture of DCTQ module in MPEG-4 video codec
| Autor: | Hanjin Cho, Bontae Koo, Igkyun Kim, Ki-Bum Suh, Kyung-Soo Kim, Seongmo Park, Seong-Min Kim |
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| Rok vydání: | 2003 |
| Předmět: |
Very-large-scale integration
business.industry Computer science Quantization (signal processing) ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Macroblock Data_CODINGANDINFORMATIONTHEORY computer.file_format MPEG-4 Discrete cosine transform Codec Image file formats Hardware_ARITHMETICANDLOGICSTRUCTURES business computer Computer hardware Scan conversion |
| Zdroj: | ISCAS (1) |
| DOI: | 10.1109/iscas.2002.1009956 |
| Popis: | In this paper, a VLSI architecture for DCTQ module, which consists of 2D-DCT, quantization, AC/DC prediction block, scan conversion, inverse quantization and 2D-IDCT, is presented. The architecture of the DCTQ is designed to handle a macroblock data within 1064 cycles and suitable for MPEG-4 video codec handling CIF image formats. Only single 1-D DCT/IDCT cores are used for the design instead of 2-D DCT/IDCT, respectively. 1-bit serial distributed arithmetic architecture is adopted for 1-D DCT/IDCT to reduce the hardware area in this architecture. As the result, the maximum utilization of hardware can be achieved, and power consumption can be minimized. The proposed design is operated on 27 MHz clock. The area is 50 % smaller than the previous methods with 2D-DCT and IDCT. The experimental results show that the accuracy of DCT and IDCT meet the IEEE specification. |
| Databáze: | OpenAIRE |
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