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May 12, 2006

Still cameras that record HDTV may require solid state memory to keep them compact. That means MPEG-4 AVC encoding will be required to lower bandwidth.

Panasonic and Sony took a step in that direction today when they jointly announced a new MPEG-4 digital-video-camera/recorder format.

The new "AVCHD" format, which will allow recording and playback of high-definition 1080i and 720p video onto 8-cm DVD media, far smaller than today's conventional 120-cm DVD discs, or even the 12-cm miniature DVDs currently used for recording.

Separately, Panasonic said it would use the AVCHD standard to allow consumers to record HD video to standard SD memory cards.

Neither Panasonic nor Sony said when products using the technology would be sold. At the high end, the AVHCD format will allow recording at 1080i at 60 frames per second (1080/60i), 1080/50i, and 1080/24p; while midrange 720/60p, 720/50p, and 720/24p formats will be complemented by a 480/60i format at the low end. In HD, a bit rate around 18Mbps is used.

The AVHCD format will use the AC-3 audio codec to acheive between 64 to 640 Kbits/s of audio data over 5.1 channels, or 1.5-Mbits/s of PCM audio over two speakers.

Panasonic believes the SD Memory Card is the recording media best suited for video cameras, and has already released a professional-use HD video camera that uses SD memory card technology. SANYO's $799 Xacti HD1 can record both 720p high-definition video and 5.1 megapixel digital still images to a standard SD flash memory card. It can record over 21 minutes of 720p HD video on a 1-Gigabyte SD card and 42 minutes on a 2-Gigabyte card.

A cost/effective MPEG-4 AVC encoder might be the tricky bit. Maybe Panasonic will add an audio input jack on their still cameras, too. One can hope.


Originally posted by samc from Daily Wireless, remediated by yatta on May 12, 2006 at 08:39 AM