Hardware implementation based on FPGA-based H.264 DCT algorithm

Abstract: Two-dimensional discrete cosine (DCT) is in H. 264 The role of the signal from the time domain to the frequency domain transform in the video encoding. High-efficient H.saffected by the on-site programmable logic gate array (FPGA). 264 DCT hardware circuit. First, convert the two-dimensional 44 DCT transformation into a secondary one-dimensional DCT transformation; second, a two-port RAM is added between the DCT transform to implement the number of transactions; Finally, a limited state machine is controlled throughout the process. This design uses fewer resources to achieve better functions and obtain reliable experimental results. Key words: two-dimensional discrete cosine transformation; FPGA; H. 264; DCT Introduction At present, encoding technology based on block DCT has become the core technology of image / video encoding international standards, and on the one hand, because DCT has good de-correlation and energy compression, the other aspect is because DCT has a fast implementation algorithm. With the rapid development of digital multimedia technology, h. The 264 video compression standard has been widely used in multiple fields. However, in the current limited network bandwidth, FPGA limited resources and require higher compression rates, a higher requirement is proposed for two-dimensional discrete cosine transform (DCT). H. 264 A 44 integer discrete cosine transform technology is used to avoid the universal 88 discrete cosine shift in the previous standard, and inverse transformation often occurs. 1 H. 264 integer DCT transformation One-dimensional N-point discrete cosine variant (DCT) can be expressed as: Be Where: XN is the nth item in the input time domain sequence; YK is the k term in the output frequency domain sequence; the coefficient CK is defined as follows: Be H. 264 The 44 image block is operated, the corresponding 4 × 4DCT transform matrix A is:, the technology area Mei Gao Si Mei Polarfire FPGA device won the "Today Electronics" and 21C.com "2017 Accelerate new technology and drive the future DSP experts give you a reason to choose FPGA AccelerComm and Achronix implementation 5G polarization code with SpeedCore EFPGA integration to support customers 5G 2018 Subingisi is a big attack machine learning market

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