System and method for transferring non-compliant packetized and streaming data into and from a multimedia device coupled to a network across which compliant data is sent

• US 8,606,382 B2
• Filed: 02/02/2010
• Issued: 12/10/2013
• Est. Priority Date: 06/02/2004
• Status: Active Grant

• Current Assignee: Standard Microsystems Corporation (Microchip Technology Incorporated)
• Original Assignee: Standard Microsystems Corporation (Microchip Technology Incorporated)
• Inventors: Hetzel, Herbert, Knapp, David J.
• Primary Examiner(s): MCCORD, PAUL C
• Application Number:
  US12/698,296
• Publication Number:
  US 20100135309A1
• Time in Patent Office: 1,407 Days
• Field of Search: 700/94
• US Class Current: 700/94
• CPC Class Codes: H04L 12/43 with synchronous transmission, e.g. time division multiplex [TDM], slotted rings

Abstract

A communication system, network, interface, and port architecture are provided for transporting different types of data across a network. The network can be arranged by connecting the ports in a daisy chain fashion to achieve a ring architecture or topology. The network forwards data according to a specific network protocol, and any incoming data that follows that protocol will be sent onto the network. If the incoming data protocol does not match the network protocol, then the incoming data is not sent immediately to the network, but instead is sent to an input pin of a device upon the network specifically designed to receive that incoming data. The network, therefore, has ports that support both compliant and non-compliant incoming data, and the devices that produce such data. Examples of non-compliant data include any data which does not time-division multiplex different asynchronous, isochronous, and synchronous data in dedicated channels within each frame, and which have a preamble, coding, frequency, or overall protocol different from that which is established for network transfer.

Claims

1. A communication system, comprising:

a first multimedia device having a first port that includes a first port receive input, a first port transmit output, a first port bypass input, and a first port bypass output;

a second multimedia device having a second port that includes a second port receive input and a second port transmit output;

wherein the first port receive input and second port transmit output are coupled to transfer digital data and right analog audio data;

wherein the second port receive input and first port transmit output are coupled to transfer digital data and left analog audio data; and

wherein the first multimedia device further includes a third port that includes a third port bypass input and a third port bypass output, wherein the first port bypass output is coupled to the third port bypass input; and

wherein the first port further comprises a serial input pin of a processor, and a multiplexer coupled to receive the digital data and to transfer the digital data to the first port bypass output if the digital data is compliant with a protocol by which data is transferred between the first port bypass output and the third port bypass input, otherwise the digital data is sent to the serial input for processing by the processor.

2. The communication system as recited in claim 1, wherein the right analog audio data and left analog audio data are transferred concurrently.

3. The communication system as recited in claim 1, wherein the first multimedia device includes at least one pin (i) into which right analog audio data and digital data are received, (ii) from which right analog audio data and digital data are transmitted, (iii) into which left analog audio data is received and from which digital data is transmitted, or (iv) from which left analog audio data is transmitted and into which digital data is received.

4. The communication system as recited in claim 1, wherein the first multimedia device includes at least one pin (i) into which left analog audio data and digital data are received, (ii) from which left analog audio data and digital data are transmitted, (iii) into which right analog audio data is received and from which digital data is transmitted, or (iv) from which right analog audio data is transmitted and into which digital data is received.

5. The communication system as recited in claim 1, wherein the first multimedia device comprises an analog-to-digital converter, and wherein the second multimedia device comprises a digital-to-analog converter, or vice versa.

6. The communication system as recited in claim 1, wherein the first port further includes:

a comparator that compares a frequency of the digital data with a frequency of the right analog audio data; and

a multiplexer coupled to the comparator for transferring the digital data to the first port bypass output if the comparison result indicates a DC bias associated with the digital data and the digital data is compliant with a protocol by which data is sent from the first port bypass output to the third port bypass input, otherwise a connection is made between the first port bypass input and the first port bypass output.

7. The communication system as recited in claim 1, wherein the first port further includes:

a comparator that compares a DC bias upon the digital data with a DC bias upon the left or right analog audio data; and

a multiplexer coupled to the comparator for transferring the digital data to the first port bypass output if the comparison result indicates a DC bias associated with the digital data and/or the digital data is compliant with a protocol by which data is sent from the first port bypass output to the third port bypass input, otherwise a connection is made between the first port bypass input and the first port bypass output.

8. The communication system as recited in claim 1, wherein the first port further comprises:

an input of a pair of analog-to-digital converters coupled to receive the left and right analog audio data; and

a processor coupled to an output of each of the pair of analog-to-digital converters.

9. The communication system as recited in claim 8, wherein the third port further comprises:

another processor for receiving digitally converted said pair of left and right analog audio data; and

a pair of digital-to-analog converters coupled to convert the digitally converted said pair of left and right analog audio data.

10. The communication system as recited in claim 9, wherein the first port further comprises:

an interface circuit coupled between the pair of analog-to-digital converters and the first port output for converting the digitally converted said right and left analog audio data to compliant data and forwarding the compliant data to the third port input as synchronous or isochronous data.

11. The communication system as recited in claim 1, wherein the protocol comprises synchronous data, packetized data, isochronous data and control data sent in time-division multiplexed time slots within each frame of data sent at the same transfer rate across the network.

12. The communication system as recited in claim 1, wherein the protocol comprises DC-free encoded data.

13. The communication system as recited in claim 1, wherein the protocol comprises frames of data transferred at either 48 kHz or 44.1 kHz.

14. The communication system as recited in claim 1, wherein the serial input pin is adapted to accommodate Sony/Philips Digital Interface Format (SPDIF) data.

15. The communication system as recited in claim 1, wherein the serial input pin is adapted to accommodate a serial bitstream of TCP/IP data.