Multimedia system for mobile client platforms

Inactive Publication Date: 2006-10-19
KREBS MARK SINCLAIR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024] In a fifth aspect, the invention pertains to the implementation of a moble handset MPEG4 video and MC audio player that is hardware-independent and operating system independent, and can simply be downloaded prior to media playback on mobile clients that do not have embedded media players. Hardware and operating system independence are characteristics of Java applets, but

Problems solved by technology

These hardware limitations include slow CPUs, high memory latencies, slow drawing capabilities and the absence of YUV to RGB conversion in the hardware.
At the time of this writing, most cell phones cannot support multimedia playback because they are only capable of supporting one or a few concurrent processing threads.
On handsets that have embedded media players, video Is also limited to very low frame rates and the bandwidth available for streaming in North America is low, varying from 2-3 kybtes/second to ISDN speeds of 64 Kbits.
But again, this approach doe

Method used

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  • Multimedia system for mobile client platforms
  • Multimedia system for mobile client platforms
  • Multimedia system for mobile client platforms

Examples

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Example

[0047]FIG. 1 illustrates a centralized content server system 1, utilizing a transcoder 2 and a multimedia object creator 3 to create multimedia objects from a live broadcast 4 or to transcode and create multimedia objects from archived multimedia files 5. The central server includes an indexing host system 6 to deploy created multimedia objects to relevant content servers 7 through the wired Internet and to verify all geographically dispersed wireless clients 8. The system includes the potential use of proxy cellular network http servers 9, which can cache large numbers of small multimedia objects to support large numbers of concurrent wireless clients 8 running multimedia object java applets 10 or embedded or downloaded non-java multimedia players 11.

[0048]FIG. 2 is a flow diagram illustrating the process of multimedia object identification by the multimedia object creator 3. This process encodes a Supplied Identification to each multimedia object to identify the transport protoco...

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Abstract

A method for multimedia playback and transmission to wireless clients is described. A host webserver transcodes a live digital or analog audio-visual or audio broadcast signal and splits the input stream into small multimedia objects of an efficient compression such as MPEG4/AAC, and then immediately deploys the objects to distributed content servers for a geographically dispersed population of wireless clients. A java applet object player, downloaded to wireless clients at the beginning of the multimedia on-demand session, interprets and decodes the multimedia objects as they are received, using multiple levels of optimization. The applet uses novel video and audio decoding optimizations which can be generically applied to many digital video and audio codecs, and specifically decodes Simple Profile MPEG4 video and Low Complexity AAC audio.

Description

FIELD OF INVENTION [0001] The invention relates to issues of the wireless Internet, specifically to methods of multimedia transmission and playback for mobile clients. BACKGROUND OF THE INVENTION [0002] The current methods of distributing multimedia data over the wireless Internet to mobile clients are constrained by existing wireless bandwidth, and the real-time decoding, processing and displaying of multimedia content with limited hardware capabilities. These hardware limitations include slow CPUs, high memory latencies, slow drawing capabilities and the absence of YUV to RGB conversion in the hardware. [0003] Video and audio playback exist on certain cell phone handsets, but this technology is embedded and takes advantage of low-level hardware processing to enable the performance required for media playback. Through embedded media players, several cell phone handsets and handheld computers can play either streamed video or audio. Popular digital video encoding standards for some ...

Claims

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Application Information

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IPC IPC(8): G06F17/00
CPCH03M7/42G06F17/3002G06F16/41H04N19/40H04N19/46H04N21/4621H04N21/6181
Inventor KREBS, MARK SINCLAIR
Owner KREBS MARK SINCLAIR
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