5. Betacam SX format
The fourth format in Sony's Betacam family, Betacam SX clearly meets a specific need, according to its manufacturer: news. It is economical, ensures playback compatibility of Betacam and Betacam SP footage on all SX models, and can support several generations of signal, i.e. light post-production, without any significant degradation in quality.
5.1 Recorded signals
SX is the only format on the market that uses image comparison to reduce digital throughput using interimage techniques.
Admittedly, the length of the image group (GOP) is short, since it consists of just two alternating I and B images. The B frame is defined in relation to the surrounding I frames. The MPEG-2 signal concerned complies with the 4:2:2 profile, main level. The...
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Betacam SX format
Betacam IMX format
Bibliography
In Engineering Techniques
Standards
- Information Technology – Digital compression and coding of photographic still images: JPEG profile registration, SPIFF profiles, SPIFF tags, SPIFF color spaces, APPn tags, SPIFF compression types and registration authorities (REGAUT) - ISO/CEI 10918-4 - 08-99
- Information Technology – Coding of moving images and associated sound for digital storage media up to approx. 1.5 Mbit/s - ISO/CEI 11172 - 1993
- Information...
Organizations
Joint Photographic Experts Group (JPEG) http://www.jpeg.org
Moving Picture Experts Group (MPEG) http://www.chiariglione.org/mpeg
Manufacturers
(non-exhaustive list)
Panasonic http://www.panasonic-broadcast.com
Sony http://www.sony.net
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