Information recorder, information recording medium, and information recording method

• US 20070097801A1
• Filed: 07/16/2004
• Published: 05/03/2007
• Est. Priority Date: 12/26/2003
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Ohishi, Takuo
• Granted Patent: US 7,725,004 B2
• Time in Patent Office: Days
• US Class Current: 369/30.07
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2220/257 DVDs belonging to the plus family, i.e. +R, +RW, +VR
• CPC Class Codes: G11B 2220/652 said memory being attached to the recording medium
• 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 27/329 on a disc [VTOC]
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 on disks or drums
• 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 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

An information recording device for recording a content in an information recording medium. A controller includes a creating unit for creating a time sequence index information group and a reverse time sequence index information group based on plural index information items extracted from time series data, and a recording unit for recording the index information groups in an area different from an area where the time series data are recorded.

Claims

1. An information recording device comprising a controller that adjusts recording conditions including a bit rate of time series data when recording a content in an information recording medium,

wherein the controller includes

an index information group creating unit that creates a time sequence index information group in which index information items extracted from the time series data for locating particular points of the content are arranged in time sequence of the time series data, and a reverse time sequence index information group in which the index information items are arranged in reverse time sequence of the time series data;

and

an index information group recording unit that records the time sequence index information group and the reverse time sequence index information group created by the index information group creating unit into an area of the information recording medium different from an area where the time series data are recorded.

2. The information recording device as claimed in claim 1, wherein the index information group creating unit acquires, as the index information items, a plurality of image data items representing a plurality of images that are extracted from the time series data every predetermined time.

3. The information recording device as claimed in claim 1, wherein when the content recorded in the form of the time series data is reproduced, the index information group creating unit extracts, as the index information items, a plurality of image data items representing a plurality of images that are selected, according to a predetermined instruction, from images that change with time.

4. The information recording device as claimed in claim 1, wherein the index information group recording unit records the time sequence index information group and the reverse time sequence index information group into an area adjacent to the area where the time series data are recorded.

5. The information recording device as claimed in claim 1, wherein the index information group recording unit records the time sequence index information group and the reverse time sequence index information group into an area adjacent to a Lead-In area or a Lead-Out area of the information recording medium.

6. The information recording device as claimed in claim 1, wherein the index information group recording unit records the time sequence index information group and the reverse time sequence index information group into a predetermined area of another information recording medium different from the information recording medium in which the time series data are recorded.

7. An information recording medium in which a content in the form of time series data is recorded, comprising:

a first area in which the time series data are recorded; and

a second area in which a time sequence index information group and a reverse time sequence index information group are recorded, the time sequence index information group containing index information items, which are extracted from the time series data for locating particular points of the content, arranged in time sequence of the time series data, the reverse time sequence index information group containing the index information items arranged in reverse time sequence of the time series data.

8. The information recording medium as claimed in claim 7, wherein the first area and the second area are adjacent to each other.

9. The information recording medium, wherein the second area is adjacent to a Lead-In area located at the top of a recording area where predetermined data containing the time series data are recorded or a Lead-Out area located at the end of the recording area.

10. An information recording method that records a content in the form of time series data in an information recording medium and reproduces particular points of the content, comprising:

an index information group creating step of creating a time sequence index information group in which index information items extracted from the time series data for locating the particular points of the content are arranged in time sequence of the time series data, and a reverse time sequence index information group in which the index information items are arranged in reverse time sequence of the time series data; and

an index information group recording step of recording the time sequence index information group and the reverse time sequence index information group created in the index information group creating step into an area of the information recording medium different from an area where the time series data are recorded.

11. The information recording method as claimed in claim 10, further comprising:

an index information acquiring step of acquiring, as the index information items, a plurality of image data items representing a plurality of images that are extracted from the time series data every predetermined time.

12. The information recording method as claimed in claim 10, further comprising:

an index information extracting step of reproducing the content recorded in the form of the time series data, and extracting, as the index information items, a plurality of image data items representing a plurality of images that are selected, according to a predetermined instruction, from images that change with time.

13. The information recording method as claimed in claim 10,

wherein, in the index information group creating step, the index information items are acquired every time the time series data are recorded in the information recording medium so as to create the index information groups;

and

in the index information group recording step, the index information groups are recorded when creation of the index information groups is completed in the index information group creating step.

14. The information recording method as claimed in claim 13, wherein, in the index information group recording step, the index information groups are recorded in a predetermined area of another information recording medium different from the information recording medium in which the time series data are recorded.