Late frame recovery method

• US 7,460,479 B2
• Filed: 02/13/2007
• Issued: 12/02/2008
• Est. Priority Date: 12/09/1999
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: LeBlanc, Wilfrid
• Primary Examiner(s): Pham; Chi H.
• Assistant Examiner(s): TRAN, PHUC H
• Application Number:
  US11/674,442
• Publication Number:
  US 20070133417A1
• Time in Patent Office: 658 Days
• Field of Search: 370235-236, 370/320, 370/335, 370/342, 370/441, 370412-429, 704/278, 704/503
• US Class Current: 370/235
• CPC Class Codes: H04B 3/23 using a replica of transmitted signal in the time domain, e.g. echo cancellers
• CPC Class Codes: H04J 3/0632 Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES] queuing arrangements in packet switching elements H04L49/90; synchronising systems for the synchronous transmission of a pulse code modulated video signal with one or more other pulse code modulated signals H04N7/56
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 2012/5671 Support of voice
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/263 Rate modification at the source after receiving feedback
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 65/1026 at the edge
• CPC Class Codes: H04L 65/1036 at the edge
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 67/61 taking into account QoS or priority requirements
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 2201/40 : using speech recognition speech recognition per se G10L15/00
• CPC Class Codes: H04M 2203/2027 : Live party detection
• CPC Class Codes: H04M 2203/2066 : Call type detection of indication, e.g. voice or fax, mobile of fixed, PSTN or IP
• CPC Class Codes: H04M 3/002 : Applications of echo suppressors or cancellers in telephonic connections in two-way loud-speaking telephone systems H04M9/08, echo suppressors or cancellers per se H04B3/20
• CPC Class Codes: H04M 3/22 : Arrangements for supervision, monitoring or testing
• CPC Class Codes: H04M 3/2209 : for lines also used for data transmission
• CPC Class Codes: H04M 3/2272 : Subscriber line supervision circuits, e.g. call detection circuits
• CPC Class Codes: H04M 7/006 : Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04M 7/0069 : comprising a residential gateway, e.g. those which provide an adapter for POTS or ISDN terminals
• CPC Class Codes: H04M 7/0072 : Speech codec negotiation H04L65/1069 takes precedence
• CPC Class Codes: H04Q 1/45 : using multi-frequency signalling H04Q1/46 takes precedence

Abstract

Method of processing a transmitted encoded media data stream is received. If a data element arrives prior to, or at, a predetermined playout deadline, the data element is decoded, the media represented by the decoded data element is played, and the data element is provided to a decoder state machine to update a decoder state. If a data element arrives after the predetermined playout deadline, the data element is provided to the decoder state machine to update the decoder state. In one embodiment, if the specified data element fails to arrive by the playout deadline, a subsequently received data element is saved in memory. Then, if the specified data element arrives after the predetermined playout deadline, the specified data element and the saved, subsequently received, data element are provided to the decoder state machine to update the decoder state.

Claims

1. A method of processing communication signals, comprising:

receiving a transmitted encoded media data stream comprising a plurality of data elements, each data element representing a portion of a transmitted media session;

if a late data element is not received by a specified deadline, generating an estimated media sample corresponding to the late data element;

updating a decoder state based on the estimated media sample; and

if the late data element is subsequently received after the specified deadline, decoding the late data element to generate a decoded media sample and updating the decoder state based on the decoded media sample.

2. The method of claim 1 wherein the decoded media sample is not provided to an output element for playout.

3. A method of processing communication signals, comprising:

receiving a transmitted encoded media data stream comprising a plurality of data elements, each data element representing a portion of a transmitted media session;

if a late data element is not received by a specified deadline, generating an estimated media sample corresponding to the late data element;

updating a decoder state based on the estimated media sample; and

if the late data element is subsequently received after the specified deadline, updating the decoder state based on the late data element, wherein if the late data element is received after the specified deadline, the data element is not decoded.

4. A receiver for processing transmitted media data, comprising:

a decoder operable to decode transmitted media data elements, the decoder being operable to store and update a state of the decoder; and

a late data element recovery engine, wherein if a late data element is not received by a specified deadline, the late data element recovery engine is operable to generate an estimated media sample corresponding to the late data element and the decoder is operable to update the decoder state based on the estimated media sample;

wherein if the late data element is subsequently received after the specified deadline, the decoder is operable to decode the late data element to generate a decoded media sample, and wherein the decoder is operable to update the decoder state based on the decoded media sample.

5. The receiver of claim 4 wherein the decoded media sample is not provided to an output element for playout.

6. A receiver for processing transmitted media data, comprising:

a decoder operable to decode transmitted media data elements, the decoder being operable to store and update a state of the decoder; and

a late data element recovery engine, wherein if a late data element is not received by a specified deadline, the late data element recovery engine is operable to generate an estimated media sample corresponding to the late data element and the decoder is operable to update the decoder state based on the estimated media sample;

wherein if the late data element is subsequently received after the specified deadline, the decoder is operable to update the decoder state based on the late data element, and the data element is not decoded by the decoder.

7. A receiver for processing transmitted media data, comprising:

a jitter buffer operable to receive and store each transmitted media data element until a deadline specified for the data element is reached, at which time the data element is provided to the decoder;

a decoder operable to decode transmitted media data elements, the decoder being operable to store and update a state of the decoder; and

a late data element recovery engine, wherein if a late data element is not received by a specified deadline, the late data element recovery engine is operable to generate an estimated media sample corresponding to the late data element and the decoder is operable to update the decoder state based on the estimated media sample;

wherein if the late data element is subsequently received after the specified deadline, the decoder is operable to update the decoder state based on the late data element.

8. The receiver of claim 7, wherein if the jitter buffer does not receive a late data element by the specified deadline, the jitter buffer is operable to communicate with the late data element recovery engine to cause the late data element recovery engine to generate an estimated media sample.

9. The receiver of claim 7, wherein if the jitter buffer subsequently receives the late data element after the specified deadline, the jitter buffer is operable to provide the late data element to the decoder so that the decoder state can be updated based on the late data element.