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advanced video codec high definition (AVCHD)

Advanced VideoCodec High Definition (AVCHD) is a high-definition video file format developed by Panasonic and Sony for high-definition camcorders. AVCHD can store video and audio and differs from other methods in that it has a higher resolution, supports the 16:9 aspect ratio common in high-definition television( HDTV), and can be stored on memory cards, mini DVDs, and hard drives.

For video compression, AVCHD relies on MPEG-4AVC/H.264, a process that offers higher resolution at the same data rate compared to High Definition Video( HDV). In addition to the 480- line( NTSC) and 576-line image resolutions used in the PAL television standard and SECAM, AVCHD can also compress and store HDTV at the various resolutions of 1,920 x 1,080 pixels, as 1,080/24p, 1,080/50i, and 1,080/60i. The bit depth is 8 bits, and the color subsampling is 4:2:0.

AVCHD specifications

AVCHD specifications

Audio signals can be compressed in multiple channels. Dolby Digital with Audio Code Number 3( AC-3) with variable data rates is used as audio compression. Alternatively, recording can be done with linear PCM encoding.

Camcorder with AVCHD resolution, photo: Sony

Camcorder with AVCHD resolution, photo: Sony

The AVCHD format is used in amateur and semi-professional applications. The fact that AVCHD files can be stored on SD cards and memory sticks offers the possibility to further reduce the dimensions of camcorders.

Informations:
Englisch: advanced video codec high definition - AVCHD
Updated at: 16.03.2011
#Words: 203
Links: video, file format, audio, resolution, aspect
Translations: DE
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