April 2005
Intermediate to advanced
800 pages
20h 52m
English
Content preview from A Practical Guide to Video and Audio CompressionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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28
Digital Video on the Move
28.1 Mobile Phone Delivery
Delivering content to mobile phones is technically feasible with third-generation (3G) mobile devices. These use 3G Partnership Project (3GPP) profiles based on an MPEG-4 derivative using the H.264 codec. At the available bit rates, every transmitted bit must carry useful data. The consumer or the operator is paying by the packet; thus, a compression system that wastes packets also wastes money. Customers will not put up with that for very long.
28.2 Bit-Rate Limitations
Bear in mind that the available bandwidths for mobile devices are as low as 64 Kbps. Reducing the frame rate of the video you encode will allow more bit rate to be retained for image quality. Keep the clips short. Thirty ...
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