Abstract
This paper presents a low-power design scheme to lower baseband energy consumption using joint source decoding and dynamic voltage and frequency scaling (DVFS). This scheme combines unequal error protection (UEP) developed for error resilient video coding with a variable iteration low density parity check (LDPC) decoder to trade off performance against energy consumption. Using the proposed method, we determine LDPC decoding configurations that achieve minimum energy consumption while satisfying pre-specified image quality at the receiver. The implementation results yield 17%, 37%, 52% power reductions with 0, 0.3, 1.1 dB peak signal to noise ratio (PSNR) degradation at 3.6 dB SNR in Foreman test stream respectively.
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