BROADCAST RECORDING AND REPRODUCTION APPARATUS

• US 20060269222A1
• Filed: 05/31/2006
• Published: 11/30/2006
• Est. Priority Date: 05/31/2005
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: HORII, Yuki
• Application Number:
  US11/421,146
• Publication Number:
  US 20060269222A1
• Time in Patent Office: Days
• US Class Current: 386/279
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4335 Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions storage management, e.g. defragmentation G06F3/0604; unloading stored programs G06F9/445; storage management in file systems G06F16/10; buffering arrangements in a network node or in an end terminal in packet networks H04L49/90
• 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 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• 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 21/4437 Implementing a Virtual Machine [VM] virtual machines in general G06F9/45533
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A conventional technique to accumulate a content and reproduce the accumulated content makes wasteful use of a recording area, since an application included in the accumulated content is not deleted from the recording area even after the expiration date of its certificate has passed and the application has thus become non-executable. Furthermore, when the application is executed at the time of reproducing the content, such technique wastefully performs authentication of the non-executable application with an expired certificate. The present invention provides a mechanism for authenticating a certificate of an application at the time of accumulating a content and not recording an application whose authentication has failed, as well as a mechanism for deleting, from a recording area, an application with an expired certificate in an already recorded content.

Claims

1. A broadcast recording and reproduction apparatus that receives a broadcast wave, which includes video information, audio information, an application program, and a certificate corresponding to the application program, and records and reproduces the received broadcast wave, said apparatus comprising:

a recording unit operable to record, into a recording area, the video information, the audio information, and the application program included in the received broadcast wave;

an authentication unit operable to authenticate the application program included in the broadcast wave, using the certificate corresponding to the application program;

an expiration date management unit operable to hold an expiration date of the certificate corresponding to the application program included in the broadcast wave, and to compare a current time with the expiration date of the certificate corresponding to the application program;

an application deletion unit operable to delete, from the recording area, the application program recorded in the recording area, in the case where a result of the comparison performed by said expiration date management unit indicates that the current time has passed the expiration date of the certificate corresponding to the application program; and

a broadcast wave reproduction unit operable to reproduce the video information, the audio information, and the application program included in the broadcast wave recorded in the recording area.

2. The broadcast recording and reproduction apparatus according to claim 1,

wherein said recording unit is operable to record, into the recording area, the video information and the audio information included in the broadcast wave, in the case where a result of the authentication performed by said authentication unit indicates failure.

3. The broadcast recording and reproduction apparatus according to claim 1,

wherein said recording unit includes:

a first recording control unit operable to record, into a recording area of a first recording medium, the video information, the audio information, and the application program included in the received broadcast wave; and

a second recording control unit operable to dub, onto a recording area of a second recording medium, the video information, the audio information, and the application program recorded in the recording area of the first recording medium, the second recording medium being different from the first recording medium,

wherein in the case where the expiration date of the certificate, held by said expiration date management unit, corresponding to the application program to be dubbed has passed,

said second recording control unit is operable to dub, onto the recording area of the second recording medium, the video information and the audio information out of the video information, the audio information, and the application program to be dubbed, which are recorded in the recording area of the first recording medium.

4. The broadcast recording and reproduction apparatus according to claim 3,

wherein in the case where the expiration date of the certificate, held by said expiration date management unit, corresponding to the application program to be dubbed has passed,

said application deletion unit is operable to delete the application program to be dubbed, which is recorded in the recording area of the first recording medium.

5. The broadcast recording and reproduction apparatus according to claim 1,

wherein said expiration date management unit is operable to:

hold the expiration date of the certificate corresponding to the application program included in the broadcast wave, when the application program included in the broadcast wave is recorded; and

compare the current time with the held expiration date of the certificate corresponding to the application program at regular time intervals.

6. The broadcast recording and reproduction apparatus according to claim 1,

wherein said expiration date management unit is operable to:

hold the expiration date of the certificate corresponding to the application program included in the broadcast wave, when the broadcast wave is recorded; and

perform the comparison in the case where there is not enough free space in the recording area.