TS data filtering circuit in digital broadcasting receiver

• US 6,611,497 B1
• Filed: 01/07/2000
• Issued: 08/26/2003
• Est. Priority Date: 01/11/1999
• Status: Expired due to Term

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Mihara, Yoshikazu, Yamagata, Toyomi
• Primary Examiner(s): VINCENT, DAVID ROBERT
• Application Number:
  US09/479,232
• Time in Patent Office: 1,327 Days
• Field of Search: 370/241, 370/252, 370/351, 370/464, 370/465, 370/477, 375/240, 375/240.01, 375/240.02, 375/240.25, 375/240.27, 375/240.29
• US Class Current: 370/241
• CPC Class Codes: H04N 21/42615 involving specific demultiplexing arrangements
• 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

Abstract

A TS data filtering circuit in a digital broadcasting receiver comprises storage means for storing, when it cannot be judged whether or not a data row in a TS packet is a data row to be acquired by making matching judgment by hardware, data in the TS packet in a memory, matching judgment means for making matching judgment by software on the data stored in the memory by the storage means, and means for starting the matching judgment in the matching judgment means at a stage where data corresponding to the number of effective bytes previously determined are stored in the memory in the process of storing the data in the memory by the storage means.

Claims

1. A TS data filtering circuit in a digital broadcasting receiver, comprising:

a matching judgment portion for making matching judgment on data included in a predetermined range from the head of a TS packet by hardware;

storage means for storing, when it cannot be judged whether or not a data row in the TS packet is a data row to be acquired by the matching judgment in the matching judgement portion, data in the TS packet in a memory;

matching judgment means for making matching judgment by software on the data stored in the memory by the storage means; and

means for starting the matching judgment in the matching judgment means at a stage where data corresponding to the number of effective bytes previously determined are stored in the memory in the process of storing the data in the memory by the storage means.

2. The TS data filtering circuit in the digital broadcasting receiver according to claim 1, further comprising

means for starting, when the matching judgment means does not judge that the data row is a data row to be acquired matching judgment on the subsequent TS packet by the matching judgment means.