Memory bandwidth reduction in video coding systems through context adaptive lossless reference frame compression

Silveira, Dieison; Sanchez, Gustavo; Grellert, Mateus; Possani, Vinícius N.; Agostini, Luciano

doi:10.1109/spl.2012.6211791

Cited by 6 publications

(5 citation statements)

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“…The paper [6] presents a solution for external memory bandwidth reduction based in the compression of the reference frames, which was entitled Reference Frame Context Adaptive Variable-Length Coder (RFCAVLC). Fig.…”

Section: The Rfcavlc Algorithmmentioning

confidence: 99%

“…When the ME component requests data from the Reference Memory, this information needs to be decoded by the RFCAVLC Decoder component before it is used. The algorithm proposed in work [6] is a hardware-friendly adaptation of the Huffman coding algorithm [9]. Huffman algorithm is a famous data compression technique based on statistical methods which is widely used on image and text compressors [10].…”

Section: The Rfcavlc Algorithmmentioning

confidence: 99%

“…The RFCAVLC Coder presented in [6] uses four static Huffman tables, to avoid the cost of the on-the-fly statistical analysis. This method compresses blocks of 4x4 samples.…”

Section: The Rfcavlc Algorithmmentioning

confidence: 99%

“…The great advantage of reference frame compression is that this solution reduces the number of reading and writing accesses in the external memory, without to introduce additional costs with cache memories. The previous work [6] implements the architecture of the RFCAVLC (Reference Frame Context Adaptive Variable-Length Coder), this solution is based on reference frames compression.…”

Section: Introductionmentioning

confidence: 99%

“…The architectural design achieves real time processing for high resolution videos. The designed architecture is fully compatible with the architecture presents in the work [6], the encoder. The decoding process of the RFCAVLD is performed without any information loss, avoiding drift, since the RFCAVLC uses a lossless process of encoding [6].…”

Section: Introductionmentioning

confidence: 99%

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A real time high definition architecture for the Variable-Length Reference Frame Decoder

Silveira

Porto

Agostini

2013

2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)

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Video coding systems, especially for high definition videos, require a large external memory bandwidth to encode a single video frame. Many modules of the current video encoders must access the external memory to read or write a huge amount of data. This process requires a large memory bandwidth, and also implies in large power consumption, since memory accesses are one of the main power demanding element in current digital systems. In this sense, this paper presents a real time high definition hardware architecture for the variable length reference frame decoder. This is the decoder used by the Reference Frame Context Adaptive Variable-Length Coder (RFCAVLC). The RFCAVLD (Decoder) was described in VHDL and synthesized to an Altera Stratix 4 FPGA. The proposed design is able to reach real-time encoding for WQSXGA (3200 x 2048 pixels) videos at 34 fps. The synthesis results achieved by the designed architecture indicate that this solution can be easily coupled to a complete video encoder system, with negligible hardware overhead and without compromising throughput.

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Section: The Rfcavlc Algorithmmentioning

confidence: 99%

Section: The Rfcavlc Algorithmmentioning

confidence: 99%

“…The RFCAVLC Coder presented in [6] uses four static Huffman tables, to avoid the cost of the on-the-fly statistical analysis. This method compresses blocks of 4x4 samples.…”

Section: The Rfcavlc Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations