AVCHD (Advanced Video Coding High Definition)is a file-based format for the digital recording and playback of high-definition video.
Developed jointly by Sony and Panasonic, the format was introduced in 2006 primarily for use in high definition consumer camcorders. Favorable comparisons of AVCHD against HDV and XDCAM EX solidified perception of AVCHD as a format acceptable for professional usage. Panasonic released the first professional AVCHD camcorder in autumn of 2008, followed by Sony in the first quarter of 2010.
In 2011 the AVCHD specification was amended to include 1080-line 50-frame/s and 60-frame/s modes (AVCHD Progressive) and stereoscopic video (AVCHD 3D). The new modes also allowed higher system data rate than existing modes.
AVCHD and its logo are trademarks of Panasonic and Sony.
AVCHD supports a variety of video resolutions and scanning methods, which has been further extended with the 2011 amendment of the specification. The licensing body of the specification defines a variety of labels for products compliant with specific features.
Most AVCHD camcorders support only a handful of the video and audio formats allowed in the AVCHD standard.
Most AVCHD camcorders record audio using Dolby Digital (AC-3) compression scheme. Stereo and multichannel audio is supported. Audio data rate can range from 64 kbit/s to 640 kbit/s. In practice, data rates of 256 kbit/s and 384 kbit/s have been observed.
Some professional models allow recording uncompressed linear PCM audio.
From wikipedia
No comments:
Post a Comment