Error resilient hybrid variable length codec with tough error synchronization for wireless image transmission

Y. S. Lee*, C. M. Yu, Chen-Yi Lee

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Variable-length codes, also called Huffman code [1], is the most popular data compression technique used for solving channel bandwidth bottleneck in many image compression standards such as JPEG, MPEG-2, and H263. But, it is vulnerable to loss of synchronization if they are transmitted consecutively through a noisy channel. It will result in large drops in image quality. In [2], we have proposed a novel HVLC coding scheme, which exhibits high synchronization, error correction capability and low redundancy. Simulation results show that it can achieve high signal-to-noise ratio (PSNR = 28dB) compared to existed VLC schemes at bit error rate (BER) of 10-3 environment. Here, we present HVLC codec system. It can support up to 256-entry 12bit symbol table. The codec system provides advanced options and fully programmable for pixel-based and DCT-based image coding algorithm. Based on 0.35um CMOS SPQM technology, the codec system occupies a silicon area of 3400um×3400um and consists of 88,000 gate count. It can operate at 3V power supply and yields high encoding/decoding rate of 133MSymbol/sec for real time application requirement.

Original languageEnglish
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 1 Jan 2001
EventThermoelectric Materials 2000-The Next Generation Materials for Small-Scale Refrigeration and Power Generation Applications - San Francisco, CA, United States
Duration: 24 Apr 200027 Apr 2000

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