All Canon HD camcorders record high resolution 1080i video at 50 fields (or half a full frame) per second.
The High Definition Video (HDV) standard that all Canon HD camcorders use was developed as a way to store HD resolution video on inexpensive and widely available MiniDV cassettes. This is achieved by compressing the video data, taking care not to compromise the quality of what you see. Today, HDV is one of the methods that is bringing the prohibitive cost of traditional HD capture tumbling down.
While HDV is available in two different formats, HDV1080i – recording at 1440x1080 pixels – provides the highest possible resolution. In fact, this is the same standard used by the majority of HD broadcasters worldwide.