RECORDING/REPRODUCTION DEVICE AND METHOD FOR DIGITAL BROADCASTING

• US 20080271093A1
• Filed: 07/02/2008
• Published: 10/30/2008
• Est. Priority Date: 12/24/1998
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Takao, Naoya, Okamura, Kazuo, Nabeshima, Shinji
• Granted Patent: US 8,447,167 B2
• Time in Patent Office: Days
• US Class Current: 725/70
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

A recording/reproduction device is provided wherein service content having interactivity can be restored even when recorded. In recording mode, a transport stream from a receiving device 34 is received and a conversion device 36 converts this to a packet-multiplexed stream in a condition suitable for recording, which is then output as a converted stream. The conversion device 36 selects packets relating to a desired service from the transport stream and, of these packets, selects only packets needed for reproduction and uses these to generate a converted stream. A recording device 38 records this converted stream on a recording medium 44. In reproduction mode, the converted stream from recording medium 44 is read by means of a reading device 42 and supplied to a restoration device 40. Restoration device 40, in accordance with the content of this converted stream, restores and outputs a service content signal (for example a composite signal such as NTSC). A video/image output device 46 receives this service content signal and outputs video/images. These are recorded, still in packetized condition. Consequently, since recording can be achieved including the control data, recording/reproduction can be formed without impairing the functionality of the satellite broadcast provided by the control data.

Claims

1. A device for recording and reproducing digital broadcasts comprising:

receiving means for receiving a transport stream in which a plurality of services are packet-multiplexed;

conversion means for selecting packets relating to a desired service from the received transport stream and outputs these as a converted stream;

recording means for recording the converted stream from the conversion means on a recording medium;

reading means for reading the converted stream recorded on the recording medium; and

restoration means for receiving the converted stream from the reading means and for reproducing and outputting service content,

wherein said conversion means is further operable to supply to the recording means first information representing a time, place or device at which recording on the recording medium is performed together with the converted stream or as part of the converted stream; and

the restoration means is operable to compare the first information with second information representing a time, place or device at which reproduction from the recording medium is performed and to alter the content of reproduction control in accordance with the differences between the first and the second information.

2. The device according to claim 1, wherein said conversion means is operable to generate a converted stream by selecting, of packets relating to the desired service in the transport stream, an elementary stream and PAT and PMT packets.

3. The device according to claim 2, wherein the conversion means is operable to acquire recording time information based on the TDT, TOT or PCR in the transport stream and to supply this to the recording means.

4. A recording medium on which an elementary stream of video or audio or video/audio and packet-multiplexed data of PAT and PMT selected from packets relating to a desired service in a transport stream are recorded, wherein said PMT is constituted by extracting from the PMT information in the transport stream only information associated with said elementary stream relating to the desired service;

said recording medium characterized by further recording first information representing a time, place or device at which recording on the recording medium was performed is recorded in packet-multiplexed form.

5. A method of recording and reproducting of digital broadcasts wherein a transport stream is received in which a plurality of services are packet-multiplexed and packets relating to a desired service are selected from the received transport stream to form a converted stream;

wherein the converted stream and the first information that are recorded on the recording medium was performed is generated and recorded on a recording medium;

the converted stream and the first information that are recorded on the recording medium is read; and

the converted stream and the first information are received on the converted stream is used to reproduce and output service content, and the first information is used to alter the content of reproduction control in accordance with the differences between the first information and the second information representing a time, place or device at which reproduction from the recording medium is performed.

6. A storage medium storing processor-implementable instructions for controlling a processor when executed to control a recording and reproducing device to carry out the steps of the method as claims in claim 5.