This paper presents a VLSI prototype for context-based adaptive variable length coding (CAVLC). This scheme is a part of the lossless compression process in the MPEG-4 Part 10 standard. It is applied to the quantized ...
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ISBN:
(纸本)0780385047
This paper presents a VLSI prototype for context-based adaptive variable length coding (CAVLC). This scheme is a part of the lossless compression process in the MPEG-4 Part 10 standard. It is applied to the quantized transform coefficients of the luminance component during the entropy coding process. In combination with previous transformations and quantizations, it can result in significantly increased compression ratio. The developed architecture is prototyped and simulated using ModelSim 5.40. It is synthesized using Synplify Pro 7.1(R). The results show that the architecture satisfies the real-time constraints required by different digital video applications.
This brief presents a new context-based adaptive variable length coding (CAVLC) architecture. The prototype is designed for the H.264/AVC baseline profile entropy coder. The proposed design offers area savings by redu...
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This brief presents a new context-based adaptive variable length coding (CAVLC) architecture. The prototype is designed for the H.264/AVC baseline profile entropy coder. The proposed design offers area savings by reducing the size of the statistic buffer. The arithmetic table elimination technique further reduces the area. The split VLC tables simplify the process of bit-stream generation and also help in reducing some area. The proposed architecture is implemented on Xilinx Virtex II field-programmable gate array (20000fg6764). Simulation result shows that the architecture is capable of processing common/quarter-common intermediate format frame sequences in real-time at a core speed of 50 MHz with 6.85-K logic gates.
variablelength code is an integral component of many international standards oil image and video compression. Recently. context-based adaptive variable length coding (CAVLC) is adopted by the emerging JVT (also calle...
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ISBN:
(纸本)078037889X
variablelength code is an integral component of many international standards oil image and video compression. Recently. context-based adaptive variable length coding (CAVLC) is adopted by the emerging JVT (also called H.264 in ITU, and AVC in NIPEG-4). In this paper, we describe a novel architecture for CAVLC decoder, including a coeff_token decoder, level decoder, total_zeros decoder and run_before decoder. Together with a barrel shifter and controller. the pipeline architecture can decode every syntax element in one clock cycle. Therefore, it is very suitable for video applications that require high throughput.
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