Method and system for memory usage in real-time audio systems

A method of processing media data, comprising:

• performing prediction on a first clip of media data to produce a media frame comprising a reference to a previous media clip and difference data representing a difference between the first clip and the previous clip;
• transmitting the media frame;
• receiving the media frame at a decoder;
• decoding the difference data;
• accessing stored prediction data referred to by the reference, the prediction data representing said previous media clip;
• and
• adding the decoded difference data to the stored prediction data to produce data representing the first media clip;
• wherein the first media clip and the previous media clip are each at least 256 bytes in size.

A method of transmitting media data, comprising:

• determining a difference value between a first media clip and a previous media clip;
• transmitting a reference to the previous media clip;
• and
• after transmitting the reference, transmitting the difference value.

A method of decoding media data, comprising:

• receiving a reference to a previous media clip;
• retrieving data corresponding to the previous media clip from memory;
• after receiving the reference, receiving difference data corresponding to a first media clip;
• decoding the difference data, at least a portion of said retrieving occurring substantially in parallel with at least a portion of said decoding;
• and
• adding the data retrieved from memory to the decoded difference data to produce a decoded value corresponding to the first media clip.

A method of transmitting and processing media data, comprising:

• including, in a media data portion of a media data frame structured according to a first media standard, media data corresponding to said first media standard;
• including, in a user data portion of the media data frame structured according to said first media standard, media data corresponding to a second media standard;
• decoding the media data in the media data portion of the frame according to the first media standard;
• and
• decoding the media data in the user data portion of the frame according to the second media standard.

A method of transmitting audio data, comprising:

• determining a difference value between a first audio clip of a first audio channel and a previous audio clip of a second audio channel;
• transmitting a reference to the previous audio clip of the second audio channel;
• and
• transmitting the difference value.

A method of decoding a first audio clip of a first audio channel, comprising:

• receiving a reference to a previous audio clip of a second audio channel;
• receiving difference data indicating a difference value between the first audio clip and the previous audio clip;
• retrieving previous clip data, referred to by the reference, from memory;
• decoding the difference data;
• and
• adding the previous clip data to the decoded difference data to produce a decoded value corresponding to the first audio clip.

A method of transmitting audio data, comprising:

• determining a difference value between a first audio clip of a first audio channel and a second audio clip of a second audio channel, the first and second audio clips being part of a single audio data frame;
• transmitting a reference to the second audio clip of the second audio channel;
• and
• transmitting the difference value.

A method of decoding a first audio clip of a first audio channel, comprising:

• receiving a reference to a second audio clip of a second audio channel, the first and second audio clips being part of a single audio data frame;
• receiving difference data indicating a difference value between the first audio clip and the second audio clip;
• retrieving data corresponding to the second audio clip, referred to by the reference, from memory;
• decoding the difference data;
• and
• adding the retrieved second audio clip data to the decoded difference data to produce a decoded value corresponding to the first audio clip.

A method of transmitting audio data corresponding to a first audio clip of a first audio channel, comprising:

• phase-shifting a second audio clip of a second audio channel;
• determining a difference value between said first audio clip of said first audio channel and the phase-shifted second audio clip of said second audio channel;
• transmitting a reference to the second audio clip of said second audio channel;
• and
• transmitting the difference value.

A method of decoding a first audio clip of a first channel, comprising:

• receiving a reference to a second audio clip of a second audio channel;
• receiving difference data indicating a difference value between the first audio clip and the second audio clip;
• receiving phase shift data indicating a difference in phase between the first audio clip and the second audio clip;
• retrieving previous clip data, referred to by the reference, from memory;
• phase-shifting the second clip data by an amount indicated by the phase shift data;
• decoding the difference data;
• and
• adding the phase-shifted second clip data to the decoded difference data to produce a decoded value corresponding to the first audio clip.

A method of decoding audio data, comprising:

• performing intra-frame, inter-channel prediction to determine decoded values of a plurality of audio clips corresponding to a plurality of channels based on decoded values of other audio channels within the same audio data frame, whereby the audio clips are decoded in channel order;
• storing in memory the decoded values for the plurality of audio clips in the order they are decoded;
• and
• reading the decoded values for the plurality of audio clips from memory in an order of presentation.