By Tarek Elarabi, Visit Amazon's Ahmed Abdelgawad Page, search results, Learn about Author Central, Ahmed Abdelgawad, , Magdy Bayoumi
This booklet introduces a unique transcoding set of rules for genuine time video functions, designed to beat inter-operability difficulties among MPEG-2 to H.264/AVC. the recent set of rules achieves 92.8% relief within the transcoding run time at a value of an appropriate top Signal-to-Noise Ratio (PSNR) degradation, permitting readers to take advantage of it for actual time video functions. The set of rules defined is evaluated via simulation and experimental effects. furthermore, the authors current a implementation of the recent set of rules utilizing box Programmable Gate Array (FPGA) and Application-specific general items (ASIC).
• Describes a singular transcoding set of rules for actual time video purposes, designed to beat inter-operability difficulties among H.264/AVC to MPEG-2;
• Implements set of rules provided utilizing box Programmable Gate Array (FPGA) and Application-specific built-in Circuit (ASIC);
• Demonstrates the answer to actual difficulties, with verification via simulation and experimental results.
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Extra info for Real-Time Heterogeneous Video Transcoding for Low-Power Applications
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5 includes a comparison between Yoo’s Intra algorithm and our proposed Full-Search Free Intra prediction algorithm. 264/AVC and MPEG-2 video compression standards is a good start in order to design an efficient transcoder. 264/AVC standard formates. These differences can be summarized, but not limited to the fact that the MPEG-2 standard does not use any Intra compression technique to remove the Intra frames’ spatial redundancy. 264/AVC standard encoder uses the Intra prediction technique quite frequently for compressing the reference frames (I-frames).
The non-homogeneity factors calculation process is inherited from Kim’s algorithm, but with two enhancements. The first enhancement is using only the DCT’s DC coefficient to calculate the energy of the current four 8 × 8 macro-blocks and totally excluding the AC coefficients from the calculations as shown in Eq. 1). Such modification significantly reduces the required number of arithmetic operations. 264/AVC transcoder. The second improvement is the computations of the non-homogeneity factor for the plane direction as shown in Eq.
Based on the analysis of their experimental results, they defined the threshold as a Quantization Parameter (QP) based threshold. In other words, they defined the threshold through statistical analysis based on the QP. 7 shows the statistical relationship between QP and the threshold (α) for the video sequence “Foreman” as Yoo’s team presented in [9]. Even after using the mode skip technique, Yoo’s team found out that the complexity of the Intra prediction is still unacceptably high for their targeted applications.