Generic on-chip homing and resident, real-time bit exact tests

• US 7,301,902 B2
• Filed: 03/03/2003
• Issued: 11/27/2007
• Est. Priority Date: 03/03/2003
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rambo, Darwin, Houghton, Phil
• Primary Examiner(s): Pezzlo; John
• Application Number:
  US10/378,366
• Publication Number:
  US 20040174899A1
• Time in Patent Office: 1,730 Days
• Field of Search: 370/229, 370/230, 370/329, 370/341, 370/477, 375/350, 375/253
• US Class Current: 370/230
• CPC Class Codes: G10L 19/00 Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis in musical instruments G10H
• CPC Class Codes: H04L 1/244 test sequence generators

Abstract

Details of media encoding and decoding devices which support generic homing sequences, and methods for operating such devices are disclosed. The use of generic homing sequences may permit an embodiment of the disclosed invention to support real-time, bit-exact testing of existing and future media encoding and decoding devices. An embodiment of the present invention may permit the initialization of encoding and decoding algorithms to a known state, enabling bit-exact testing of a large group of devices using these algorithms, including those whose specifications do not support such functionality. This capability may permit the full-speed, bit-exact, testing, of both locally and remotely situated media encoders and decoders.

Claims

1. A media encoding device comprising:

a sequence detector for recognizing the occurrence of a predefined data sequence in a data stream, the sequence detector producing a detect signal upon recognition of the predefined data sequence;

a selector for passing one of at least a first data stream and a second data stream to an output stream, the selector having a control input for controlling the selection, the control input operatively coupled to the detect signal of the sequence detector; and

an encoder for converting an input data stream in a first representation to an output data stream in a second representation, the encoder having a reset input operatively coupled to the detect signal of the sequence detector.

2. The media encoding device of claim 1, the sequence detector further comprising an enable input for enabling the recognition of the predefined data sequence.

3. The media encoding device of claim 1 wherein the first data stream comprises data representative of human speech.

4. The media encoding device of claim 1 wherein the second data stream comprises a test data stream.

5. The media encoding device of claim 1 wherein the encoder output stream comprises compressed speech data.

6. The media encoding device of claim 5 wherein the encoder output is compliant with at least one of the ITU-T G.726 speech encoder specification, the ITU-T G.723.1 speech encoder specification, and ETSI EN 301 703 Adaptive Multi-Rate speech encoder specification.

7. The media encoding device of claim 1 further comprising an output store for capturing the encoder output data stream for a predetermined interval following the occurrence of the detect signal.

8. The media encoding device of claim 1 wherein the sequence detector produces a second detect signal upon recognition of a subsequent occurrence of the predefined sequence immediately following recognition of a prior occurrence of the predefined sequence.

9. A media decoding device comprising:

a sequence detector for recognizing the occurrence of a predefined data sequence in a data stream, the sequence detector producing a detect signal upon recognition of the predefined data sequence;

a selector for passing one of at least a first data stream and a second data stream to an output stream, the selector having a control input for controlling the selection, the control input operatively coupled to the detect signal of the sequence detector; and

a decoder for converting an input data stream in a first representation to an output data stream in a second representation, the decoder having a reset input operatively coupled to the detect signal of the sequence detector.

10. The media decoding device of claim 9, the sequence detector further comprising an enable input for enabling the recognition of the predefined data sequence.

11. The media decoding device of claim 9 wherein the first data stream comprises compressed speech data.

12. The media decoding device of claim 9 wherein the second data stream comprises a test data stream.

13. The media decoding device of claim 9 wherein the decoder output stream comprises data representative of human speech.

14. The media decoding device of claim 13 wherein the decoder input is compliant with at least one of the ITU-T G.726 speech decoder specification, the ITU-T G.723.1 speech decoder specification, and the ETSI EN 301 703 Adaptive Multi-Rate speech encoder specification.

15. The media decoding device of claim 9 further comprising an output store for capturing the decoder output data stream for a predetermined interval following the occurrence of the detect signal.

16. The media decoding device of claim 9 wherein the sequence detector produces a second detect signal upon recognition of a subsequent occurrence of the predefined sequence immediately following recognition of a prior occurrence of the predefined sequence.