Digital audio distribution
First Claim
Patent Images
1. A system for distributing audio comprising:
- (a) a master transmitter configured for(i) multiplexing a plurality of Integrated Interchip Sound (I2S) streams as a time-division multiplexed audio stream, each frame of the I2S stream comprising sixty-four bits encoding two channels of audio at twenty-four bits precision and corresponding to a stereo source,(ii) transmitting the time-division multiplexed audio stream on a first communication path wherein each frame of the time-division multiplexed audio stream comprises a plurality of words comprising a start bit, a four bit portion of a sample frame, an inverted copy of the four bit portion, two framing bits and a stop bit, and(iii) transmitting control information on a second communication path; and
(b) an expansion receiver configured for(i) receiving the time-division multiplexed audio stream and control information;
(ii) demultiplexing the time-division multiplexed audio stream; and
(iii) distributing a desired audio channel to a speaker according to the control information.
1 Assignment
0 Petitions
Accused Products
Abstract
A master transmitter distributes a plurality of audio channels to one or more expansion receivers as a multiplexed audio stream. Control information is also transmitted between the master transmitter and the expansion receivers. Both the control information and the multiplexed audio stream are transmitted on the same cable allowing for reduced clutter and cheaper material and installation costs.
-
Citations
18 Claims
-
1. A system for distributing audio comprising:
-
(a) a master transmitter configured for (i) multiplexing a plurality of Integrated Interchip Sound (I2S) streams as a time-division multiplexed audio stream, each frame of the I2S stream comprising sixty-four bits encoding two channels of audio at twenty-four bits precision and corresponding to a stereo source, (ii) transmitting the time-division multiplexed audio stream on a first communication path wherein each frame of the time-division multiplexed audio stream comprises a plurality of words comprising a start bit, a four bit portion of a sample frame, an inverted copy of the four bit portion, two framing bits and a stop bit, and (iii) transmitting control information on a second communication path; and (b) an expansion receiver configured for (i) receiving the time-division multiplexed audio stream and control information; (ii) demultiplexing the time-division multiplexed audio stream; and (iii) distributing a desired audio channel to a speaker according to the control information. - View Dependent Claims (4, 11)
-
-
2. A system for distributing audio comprising:
-
(a) a master transmitter configured for (i) multiplexing a plurality of Integrated Interchip Sound (I2S) streams as a time-division multiplexed audio stream, each frame of the I2S stream comprising sixty-four bits encoding two channels of audio at twenty-four bits precision and corresponding to a stereo source wherein for each I2S stream a right channel address and a left channel address are successively inserted over a predefined number of sample frames in unused portions of the sample frames, (ii) transmitting the time-division multiplexed audio stream on a first communication path, and (iii) transmitting control information on a second communication path; and (b) an expansion receiver configured for (i) receiving the time-division multiplexed audio stream and control information; (ii) demultiplexing the time-division multiplexed audio stream; and (iii) distributing a desired audio channel to a speaker according to the control information. - View Dependent Claims (3)
-
-
5. A system for distributing audio comprising:
-
(a) a master transmitter configured for (i) multiplexing thirty-two Integrated Interchip Sound (I2S) streams as a time-division multiplexed audio stream, wherein each frame of the I2S stream comprises sixty-four bits encoding two channels of audio at twenty-four bit precision and for each I2S stream a right channel address and a left channel address are successively inserted over a predefined number of sample frames in unused portions of the sample frames, (ii) transmitting the time-division multiplexed audio stream on a first communication path, and (iii) transmitting control information on a second communication path; and (b) an expansion receiver configured for (i) receiving the time-division multiplexed audio stream and control information; (ii) demultiplexing the time-division multiplexed audio stream; and (iii) distributing a desired audio channel to a speaker according to the control information. - View Dependent Claims (6, 7, 8, 9, 10)
-
-
12. A system for distributing audio comprising:
-
(a) a master transmitter configured for (i) multiplexing sixty-four Integrated Interchip Sound (I2S) streams as a time-division multiplexed audio stream, wherein each frame of the I2S stream comprises sixty-four bits encoding two channels of audio at twenty-four bit precision and for each I2S stream, a right channel address and a left channel address are successively inserted over a predefined number of sample frames in unused portion of the sample frames, (ii) transmitting the time-division multiplexed audio stream on a first communication path, and (iii) transmitting control information on a second communication path; and (b) an expansion receiver configured for (i) receiving the time-division multiplexed audio stream and control information; (ii) demultiplexing the time-division multiplexed audio stream; and (iii) distributing a desired audio channel to a speaker according to the control information.
-
-
13. A system for distributing audio comprising:
-
(a) a master transmitter configured for (i) multiplexing a plurality of audio channels as a time-division multiplexed audio stream, (ii) transmitting the time-division multiplexed audio stream on a first communication path, and (iii) transmitting control information on a second communication path wherein control information comprises one of the following;
a zone grouping control, a source selection control, a volume level control, a tone control and an equalization control; and(b) an expansion receiver configured for (i) receiving the time-division multiplexed audio stream and control information; (ii) demultiplexing the time-division multiplexed audio stream; and (iii) distributing a desired audio channel to a speaker according to the control information. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification