Digital data receiver

• US 8,369,418 B2
• Filed: 08/24/2007
• Issued: 02/05/2013
• Est. Priority Date: 10/17/2006
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Chozui, Sadatoshi
• Primary Examiner(s): Tran, Thai
• Assistant Examiner(s): Park, Sunghyoun
• Application Number:
  US12/445,880
• Publication Number:
  US 20100322320A1
• Time in Patent Office: 1,992 Days
• Field of Search: None
• US Class Current: 375/240.27
• CPC Class Codes: H04N 19/895 in combination with error concealment
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4385 Multiplex stream processing, e.g. multiplex stream decrypting
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/4425 Monitoring of client processing errors or hardware failure

Abstract

To be able to combine audio quality with video quality, a digital data receiver (100) performs different processing depending on the type of those packets among TS packets, in which errors occur. To this end, the digital data receiver (100) includes: a PID filtering section (102) for identifying video packets and audio packets, a transport error indicator detecting section (104b) for determining whether a video packet is an error packet based on its header information, a video packet removing section (107b) for removing a video packet determined to be an error packet only when the video packet satisfies predetermined conditions, a transport error indicator detecting section (104c) for determining whether an audio packet is an error packet based on its header information, and an audio packet removing section (107c) for removing an audio packet determined to be an error packet.

Claims

1. A digital data receiver comprising:

a filtering section that identifies a video packet and an audio packet contained in received digital data,

an audio processing section that performs decoding processing of the audio packet identified by the filtering section and outputting audio data, and

a video processing section that performs decoding processing of the video packet identified by the filtering section and outputting video data,

wherein the audio processing section comprises;

an audio packet error detecting section that references header information in the audio packet to determine whether the audio packet is an error packet, and

an audio packet removing section that removes an audio packet determined to be an error packet and inserts an audio packet containing specific information enabling discontinuity detection by an audio decoder in the subsequent stage,

wherein the video processing section comprises;

a video packet error detecting section that references header information in the video packet to determine whether the video packet is an error packet, and

a video packet removing section that removes a video packet determined to be an error packet only when the video packet satisfies predetermined conditions, and

wherein the video packet removing section removes the video packet determined to be an error packet when one or a plurality of video packets preceding the video packet determined to be an error packet have not been received, and

wherein the video packet removing section removes the video packet determined to be an error packet when the one or the plurality of video packets preceding the video packet determined to be the error packet are error packets.

2. The digital data receiver according to claim 1, wherein the video packet removing section removes video packets determined to be error packets when the number of the video packets determined to be error packets among the video packets contained in an encoding processing unit exceeds a predetermined criterion.

3. The digital data receiver according to claim 1, wherein the video packet removing section removes a video packet determined to be an error packet when the video packet is the leading packet of an encoding processing unit.

4. The digital data receiver according to claim 1, wherein the audio packet removing section also removes one or a plurality of audio packets subsequent to an audio packet determined to be an error packet.

5. The digital data receiver according to claim 1, wherein the audio packet removing section removes all the audio packets contained in an encoding processing unit when an audio packet determined to be an error packet is present among the audio packets contained in the encoding processing unit.

6. The digital data receiver according to claim 1, wherein when an audio packet determined to be an error packet is present among audio packets contained in an encoding processing unit, the audio packet removing section removes the error packet contained in the encoding processing unit and all the audio packets preceding thereto.

7. The digital data receiver according to claim 1, further comprising a program/tuning information packet removing section that removes a tuning/program information packet determined to be an error packet.

8. The digital data receiver according to claim 7, wherein the program/tuning information packet removing section removes all the program/tuning information packets contained in an encoding processing unit when a program/tuning information packet determined to be an error packet is present among the program/tuning information packets contained in the encoding processing unit.