MPEG Encoding The Imagine stream programming model applies several kernels to an incoming video stream to generate MPEG-2 compressed video.  The kernels in the compressor are: Color Conversion Motion Estimation Discrete Cosine Transform Quantization Run-length Encoding Variable-length Coding IDCTQ/Correlation for Reference Frame Figure 1 shows how the MPEG-2 compression algorithm is mapped onto the Imagine. Figure 1: Mapping MPEG-2 onto Imagine stream model

Performance Cycle-accurate simulations of Imagine show the high performance that can be achieved on MPEG-2 compression.   Raw speed measurements are: For 360x288 images, 24-bit: 350 frames per second For 720x480 images, 24-bit: 105 frames per second Overall, the Imagine achieves 18.3 GOPS, with a power efficiency of 8.3 GOPS/W.

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