Video recording and reproducing system and reading method of video data

• US 20090067818A1
• Filed: 09/03/2008
• Published: 03/12/2009
• Est. Priority Date: 09/06/2007
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kittaka, Rikuo, Terao, Motohiro, Tokunaka, Junzo
• Granted Patent: US 8,655,139 B2
• Time in Patent Office: Days
• US Class Current: 386/241
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/329 on a disc [VTOC]

Abstract

A data reading device includes a reading means for reading video data recorded in a video processing device which records and plays back video data and a control means for controlling the reading means so as to read video data from the video processing device by transmitting a reading request of index data to a video writing device which writes the video data to the video processing device when video data whose index data indicating an address of the video data is not recorded in the video processing device from the video processing device, and by designating the address indicated by the index data transmitted from the video writing device.

Claims

1. A data reading device comprising:

a reading means for reading video data recorded in a video processing device which records and plays back video data; and

a control means for controlling the reading means so as to read video data from the video processing device by transmitting a reading request of index data to a video writing device which writes the video data to the video processing device when video data whose index data indicating an address of the video data is not recorded in the video processing device from the video processing device, and by designating the address indicated by the index data transmitted from the video writing device.

2. The data reading device according to claim 1, further comprising:

a securing means for securing an index frame which is an area in which the index data is recorded and a data frame which is an area in which the video data is recoded in a recording means in which the video data is recorded,

a transmission means for transmitting a reading request of the index data to the video writing device;

a recording means for reading video data from the video processing device and recording the read video data in the data frame of the video recording means by designating an address indicated by the index data transmitted from the video writing device; and

an index recording means for recording the index data concerning video data recorded in the data frame in an index frame of the recording means.

3. The data reading device according to claim 1,

wherein the video writing device includes

a memory storing index data indicating an address of the video data;

and

a writing means for writing index data stored in the memory in the video processing device.

4. A method of reading data comprising the steps of:

reading video data recorded in a video processing device which records and plays back video data; and

controlling the reading step so as to read video data from the video processing device by transmitting a reading request of index data to a video writing device which writes the video data to the video processing device when video data whose index data indicating an address of the video data is not recorded in the video processing device from the video processing device and by designating the address indicated by the index data transmitted from the video writing device.

5. A data reading device comprising:

a reading unit configured to read video data recorded in a video processing device which records and plays back video data; and

a control unit configured to control the reading unit so as to read video data from the video processing device by transmitting a reading request of index data to a video writing device which writes the video data to the video processing device when video data whose index data indicating an address of the video data is not recorded in the video processing device from the video processing device, and by designating the address indicated by the index data transmitted from the video writing device.