A Development of 1/2-in. HDTV Digital VTR Incorporating Bit Rate Reduction Technology

Toshihiro Uehara, Keigo Majima, Tatsuya Kurioka, Takashi Kato, Syouichiro Ogawa, Haruo Okuda, Hideo Ohshima, Junichiro Kawano, Shigemi Mikami, Mitsuo Chiba, Tatsushi Bannai

We have developed a 1/2-in. high-definition television (HDTV) digital VTR for program production, editing, and broadcasting incorporating bit rate reduction (BRR) technology. The objectives aimed at in developing the HDTV VTR are high picture quality, editing/trick play functions equal to those of conventional definition television (CDTV) VTRs, and a low running cost. — Based on the results of a subjective assessment test using compressed moving pictures, we have employed intra-field fixed length discrete cosine transform (DCT) in BRR and set the compression factor at 4.1 for 8-bit video signal quantization and at 5.4 for 10-bit quantization. To hold down the cost of development and realize its early application, we developed an HD processor, which encodes and decodes HDTV video signals, and added it to a D-5 VTR used in CDTV. The newly developed BRR HDTV VTR provides improved picture quality as well as effective error concealment through the incorporation of such new technologies as adaptive processing, overlap blocking, and individual sync block allocation for low/high frequency component codes.

Published: 1996-10
Content type: Original Research
DOI: 10.5594/M001255
ISBN: 978-1-61482-947-8