It is well known that H.264 has great advantage of coding efficiency compared with the successful prior coding standards and it can save about 50% bit-rate under the same reconstructed picture quality. But the complexity of H.264 encoder is also very high. In order to improve the speed of the H.264 encoder, this paper researches the intra modes for inter-frame coding. The algorithm of mode decision for inter-frame coding is introduced and the complexity of the H.264 encoder is analyzed from the side of transform and quantization. In order to speed up the H.264 encoder without causing a great decrease in encoding efficiency, a fast intra mode decision method for inter-frame coding is also introduced. The experimental results show that the inter-frame coding with fast intra mode decision can reduce the computational complexity of the H.264 encoder remarkably while incurring little, if any, loss in quality.
['Yun Cheng', 'Zhiying Wang', 'Jianjun Guo', 'Kui Dai']
Research on intra modes for inter-frame coding in H.264