Development of an Advanced Encoder for HDTV Broadcasting

H. Yasuda, S. Miyazawa, Y. Honm

A new video encoder for MPEG-2 HDTV (MP@HL (1080i)), which achieves good performance at 11 Mbits/sec, has been developed. It is a higher video quality encoder than the TM5 MPEG-2 video encoding algorithm, the algorithm test model used during MPEG-2 standard development. Many problems were found in low bit rate domains (around 11 Mbits/sec), and to correct these problems, the traditional method was tuned up, and a new method was established. Pre-encoding architecture and a flexible group-of-pictures (GOP) structure were adopted to achieve high-compression performance The control of symbols distribution algorithm and pre-filtering-logic were also adopted, and attempts were made to assign more discrete cosine transform (DCT) coefficients while optimizing the method for computing motion vectors Using these methods a signal-to-noise ration (SNR) about 4-dB higher than TM5 was achieved.

Print ISSN: 1545-0279
Electronic ISSN: 2160-2492
Published: 2004-12
Content type: Original Research
DOI: 10.5594/J16247