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Mobile device and method for concurrently processing content according to multiple playlists

  • US 9,703,784 B2
  • Filed: 12/24/2007
  • Issued: 07/11/2017
  • Est. Priority Date: 12/24/2007
  • Status: Expired due to Fees
First Claim
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1. A mobile device comprising:

  • a memory located within the mobile device for storing content;

    a controller located within the mobile device adapted to process concurrently the content stored in the memory to produce a first content stream according to a first playlist and to produce a second content stream according to a second playlist, the second playlist differing from the first playlist and the first and second content streams including at least audio content, wherein the first content stream is distinct from the second content stream and wherein the controller includes;

    a microprocessor that alternatingly and respectively outputs the first and second content streams to first and second direct memory access (DMA) channels;

    first and second stream buffers for respectively receiving the content streams from the first and second DMA channels; and

    first and second digital to analog (D/A) converters for respectively outputting the first and second content streams;

    a first output interface of the mobile device adapted to receive the first content stream from the first D/A converter and to convey the first content stream; and

    a second output interface of the mobile device distinct from the first output interface and adapted to receive the second content stream from the second D/A converter and to convey the second content stream simultaneously with the conveyance of the first content stream, wherein the first and second output interfaces each comprise a speaker or headphone interface for respectively and simultaneously playing the first and second content streams to one or more users via speakers or headphones connected to the speaker or headphone interfaces.

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