Information recording apparatus and method for the same

• US 20020146239A1
• Filed: 01/16/2002
• Published: 10/10/2002
• Est. Priority Date: 01/16/2001
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Yahata, Hiroshi, Hamasaka, Hiroshi, Nakanishi, Nobuo, Yagi, Tomotaka
• Granted Patent: US 7,356,247 B2
• Time in Patent Office: Days
• US Class Current: 386/95
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/2575 DVD-RAMs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 5/85 on discs or drums
• 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

Abstract

Entry points are managed so they are easy for users to understand. The data recording apparatus has a receiver unit that receives a stream of encoded digital data; an analyzer that detects change in an attribute of the received stream and that outputs the detection information; a controller that generates management information containing the detection information output by the analyzer and time information indicating detection time of the change as a first entry point; a drive that records the management information and the received stream to a data storage medium; and an input unit that defines a second entry point. This second entry point is set relative to the playback path of the stream and used to access and read from a particular point in the stream. The controller further generates the management information containing the first entry point and the second entry point separately identified.

Claims

1. A data recording apparatus comprising:

a receiver unit that receives a stream of encoded digital data;

an analyzer that detects a change in an attribute of the stream received by the receiver unit and that outputs detection information;

a controller that generates management information containing the detection information output by the analyzer and time information indicating detection time of the change as a first entry point;

a drive that records the management information generated by the controller and the stream received by the receiving unit to a data storage medium; and

an input unit that defines a second entry point which is set relative to playback path of the stream and is used to access and read from a particular point in the stream,

said controller further generating the management information containing the first entry point and the second entry point respectively identified.

2. A data recording apparatus according to claim 1, wherein the controller generates the management information including a first table containing the first entry point and a second table containing the second entry point.

3. A data recording apparatus according to claim 1, wherein the controller generates the management information including separate identification flags for the first entry point and the second entry point.

4. A data recording apparatus according to claim 2, wherein the analyzer detects at least one of the following as the change in the attribute of the stream:

a change in a broadcast program when the stream is a digital broadcast stream, a change of PSI/SI information in digital broadcast stream that controls playback of the stream, a change in a multi-view attribute, a change back to a starting point of a data carousel, a change in content of the data carousel, a change in program map table PMT, a module change, a change of data event, a change in parental control information, a change in an audio stream attribute, and a change in sequence header information when the stream is a digital broadcast MPEG video stream.

5. A data recording apparatus according to claim 4, wherein the management information contains link information to AV data recorded on the data storage medium for the first entry point and the second entry point.

6. A data recording apparatus according to claim 2, further comprising:

a reading unit that reads the management information and the stream recorded on the data storage medium;

a decoder that decodes the stream read by the reading unit; and

an output unit that outputs the management information read by the reading unit and the stream decoded by the decoder,

in the case the second entry point is input from the input unit, the reading unit reading the management information, and the output unit displaying the first entry point contained in the first table and the second entry point previously input and contained in the second table of the management information.

7. A data recording apparatus according to claim 2, further comprising:

a reading unit that reads the management information and the stream recorded on the data storage medium;

a decoder that decodes the stream read by the reading unit; and

an output unit that outputs the management information read by the reading unit and the stream decoded by the decoder, the reading unit reading the management information, and the output unit displaying the second entry point contained in the second table of the management information.

8. A data recording apparatus according to claim 3, wherein the data storage medium is an optical disc.

9. A data recording method comprising:

receiving a stream of encoded digital data;

detecting a change in an attribute of the stream received by the receiver unit and outputting detection information;

generating management information containing the detection information and time information indicating detection time of the change as a first entry point;

recording the generated management information and the received stream to a data storage medium; and

defining a second entry point which is set relative to playback path of the stream and is used to access and read from a particular point in the stream,

said generating further generating the management information containing the first entry point and the second entry point separately identified.

10. A data recording method according to claim 9, wherein said generating generates the management information including a first table containing the first entry point and a second table containing the second entry point.

11. A data recording method according to claim 9, wherein said generating generates the management information including separate identification flags for the first entry point and the second entry point.

13. A data recording program according to claim 12, wherein said generating generates the management information including a first table containing the first entry point and a second table containing the second entry point.

14. A data recording program according to claim 12, wherein said generating generates the management information including separate identification flags for the first entry point and the second entry point.

15. A data storage medium recording a data recording program according to claim 13.

12. A computer-executable, data recording program comprising:

receiving a stream of encoded digital data;

detecting a change in an attribute of the stream received by the receiver unit and outputting detection information;

generating management information containing the detection information and time information indicating detection time of the change as a first entry point;

recording the generated management information and the received stream to a data storage medium; and

defining a second entry point which is set relative to playback path of the stream and is used to access and read from a particular point in the stream,

said generating further generating the management information containing the first entry point and the second entry point separately identified.