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AVCHD Format
Specifications
AVCHD is an HD video format that uses Advanced Video Coding (AVC)
compression (also known as MPEG-4 part 10 or H.264).
Video Standard
The AVCHD specification was jointly developed by Sony and Panasonic.
AVCHD allows for HD recording (1080i, 1080p, and 720p) and SD
recording (480i and 576i).
Aspect Ratio
AVCHD records HD video with an aspect ratio of 16:9. SD video can be
recorded with either a 4:3 or 16:9 aspect ratios.
Frame Dimensions, Number of Lines, and Resolution
AVCHD supports three HD video resolutions:
1920 x 1080: This format is sometimes called Full HD because it
contains the full 1920 horizontal pixels of the 1080-line HD format.
1440 x 1080: This is a horizontally sub-sampled image with 1080 lines.
1280 x 720: This is a full-resolution 720p format.
SD NTSC and PAL compatible formats are also defined in the AVCHD
specification:
720 x 480 at 60i
720 x 576 at 50i
Frame Rate
The specified AVCHD frame rates are:
NTSC compatible frame rate: 29.97 fps (1080i60, 720p60) PAL
compatible frame rate: 25 fps (1080i50, 720p50) Film compatible frame
rate: 23.98 fps (1080p24, 720p24)
Scanning Method
AVCHD can record either interlaced or progressive scan images:
1080
lines: Interlaced (1080i) or progressive (1080p)
720 lines: Progressive
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