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Increasing Application Speed by combining DCT and Quant Component. BUFFERS. 18432 bytes. 36976 bytes. 37840 bytes. FREAD Reading 8-bit input data from file. DCT Discrete Cosine Transform. Quant Quantizing 6 DCT blocks : 4Y+1U+1V. VLCEnc Variable Length Coding Encoder.

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## Increasing Application Speed by combining DCT and Quant Component

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**Increasing Application Speed by combining DCT and Quant**Component**BUFFERS**18432 bytes 36976 bytes 37840 bytes FREAD Reading 8-bit input data from file DCT Discrete Cosine Transform Quant Quantizing 6 DCT blocks : 4Y+1U+1V VLCEnc Variable Length Coding Encoder QUANT-VLCEnc Buffer Macroblock (mb_frame_t : 37728 bytes) Parameter (travel_frame_pars_t : 112 bytes) Total Buffers : 37840 bytes Fread-DCT Buffer Y8-bit (Y_frame_t : 12288 bytes) U8-bit (UV_frame_t : 3072 bytes) V8-bit (UV_frame_t : 3072 bytes) Total Buffers : 18432 bytes DCT-QUANT Buffer Y16-bit (Y_frame16_t : 24576 bytes) U16-bit (UV_frame16_t : 6144 bytes) V16-bit (UV_frame16_t : 6144 bytes) Parameter (travel_frame_pars_t : 112 bytes) Total Buffers : 36976 bytes DCT and Quant as separated components exolTry.out Cycles=10340038**55408 bytes**37840 bytes DCT-Quant Fread-DCTQuantBuffer Y8-bit (Y_frame_t : 12288 bytes) U8-bit (UV_frame_t : 3072 bytes) V8-bit (UV_frame_t : 3072 bytes) Parameter (travel_frame_pars_t : 112 bytes) Y16-bit (Y_frame16_t : 24576 bytes) U16-bit (UV_frame16_t : 6144 bytes) V16-bit (UV_frame16_t : 6144 bytes) Total Buffers : 55408 bytes Inpacket Outpacket FREAD Reading 8-bit input data from file FREAD Reading 8-bit input data from file DCT Discrete Cosine Transform Quant Quantizing 6 DCT blocks : 4Y+1U+1V VLCEnc Variable Length Coding Encoder VLCEnc Variable Length Coding Encoder Y8-bit (12288) U8-bit (3072) V8-bit (3072) Parameter (112) Y16-bit (24576) U16-bit (6144) V16-bit (6144) Discrete Cosine Transform Processing Parameter (112) Macroblock (37728) DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks Quantizing Process Solution 1: DCT-Quant with a BIG Buffer 18432 bytes Advantage : 1. Combined Component Removing header process Faster Disadvantages : 1. Big Buffer Wasting Memory 2. Same Variable Structure in Buffer No Speed Reduction in Declaring Buffer exolTry.out Cycles= 10340038 exolTry.out Cycles=10281109**36976 bytes**37840 bytes DCT-Quant Fread-DCTQUANT Buffer Y16-bit (Y_frame16_t : 24576 bytes) U16-bit (UV_frame16_t : 6144 bytes) V16-bit (UV_frame16_t : 6144 bytes) Parameter (travel_frame_pars_t : 112 bytes) Total Buffers : 36976 bytes Inpacket Outpacket FREAD Reading 16-bit input data from File FREAD Reading 16-bit input data from file DCT Discrete Cosine Transform Quant Quantizing 6 DCT blocks : 4Y+1U+1V VLCEnc Variable Length Coding Encoder VLCEnc Variable Length Coding Encoder Y16-bit (24576) U16-bit (6144) V16-bit (6144) Parameter (112) Discrete Cosine Transform Processing Parameter (112) Macroblock (37728) DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks Quantizing Process Solution 2: DCT-Quant with 16-bit Input 18432 bytes Advantage : 1. Combined Component Removing header process Faster 2. Reusing the input Variables Saving the memory in Buffer Disadvantage : 1. Input data must be in 16-bit Need more processing if we have 8-bit input exolTry.out Cycles= 10340038 exolTry.out Cycles=10231500**18432 bytes**37840 bytes DCT-Quant Inpacket Outpacket FREAD Reading 8-bit input data from File FREAD Reading 8-bit input data from file DCT Discrete Cosine Transform Quant Quantizing 6 DCT blocks : 4Y+1U+1V VLCEnc Variable Length Coding Encoder VLCEnc Variable Length Coding Encoder Y8-bit (12288) U8-bit (3072) V8-bit (3072) Parameter (112) Discrete Cosine Transform Processing Quantizing Process Macroblock (37728) Parameter (112) Fread-DCT Buffer Y8-bit (Y_frame_t : 12288 bytes) U8-bit (UV_frame_t : 3072 bytes) V8-bit (UV_frame_t : 3072 bytes) Total Buffers : 18432 bytes DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks DCT-Quant Discrete Cosine Transform, then Quantizing the DCT blocks Y16-bit (24576) U16-bit (6144) V16-bit (6144) Temp Vars Solution 3: DCT-Quant with Temporary Variables 18432 bytes Advantages : 1. Less Buffer needed 2. Combined Component Removing header process Faster Disadvantage : 1. Declaring & Freeing memory for temporary variables Needs more time exolTry.out Cycles= 10340038 exolTry.out Cycles=10289104**Comparison**Solution 1: BIG Buffer Solution 2: 16-bit Input Solution 3: Temp Vars. Big Buffer Wasting Memory No Speed Reduction in Declaring Buffer Reusing the input Variables Saving the memory in Buffer Input data must be in 16-bit Need more processing if we have 8-bit input Less Buffer needed Declaring & Freeing memory for temporary variables Needs more time Buffer : 55408 bytes Buffer : 36976 bytes Buffer : 18432 bytes Cycles=10281109 Cycles=10231500 Cycles=10289104

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