Playback device, control method, and program

• US 9,661,259 B2
• Filed: 02/14/2014
• Issued: 05/23/2017
• Est. Priority Date: 03/28/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Esumi, Kenji, Iino, Susumu
• Primary Examiner(s): Dang, Hung
• Assistant Examiner(s): Wendmagegn, Girumsew
• Application Number:
  US14/762,778
• Publication Number:
  US 20160006975A1
• Time in Patent Office: 1,194 Days
• Field of Search: 386248
• CPC Class Codes: G06F 3/06 Digital input from, or digital output to, record carriers , e.g. RAID, emulated record carriers or networked record carriers
• CPC Class Codes: G11B 27/00 Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/91 Television signal processing therefor
• CPC Class Codes: H04N 9/87 Regeneration of colour television signals H04N9/80 takes precedence

Abstract

In a case where a first access request from a playback controller (131) is a request for requesting reading or writing in a local storage area (111), a data access controller (135) causes a virtual-package-data file system processor (122) to perform reading or writing of virtual package data in the local storage area (111) with priority over the reading or writing of application data in an application data area (112) by a file system processor (123).

Claims

1. A playback device comprising:

a virtual-package-data file system processor to treat a combination of first data recorded in a first recording unit and second data recorded in a local storage area in a second recording unit including the local storage area and an application data area as virtual package data and performs reading and writing of the virtual package data;

a file system processor to perform reading and writing of application data recorded in the application data area;

a playback controller to control playback of the virtual package data;

a processing execution unit to process the application data; and

a data access controller to cause the virtual-package-data file system processor to perform reading or writing of the virtual package data according to a first access request from the playback controller, the first access request requesting reading and writing of the virtual package data, and to cause the file system processor to perform reading or writing of the application data according to a second access request from the processing execution unit, the second access request requesting reading or writing of the application data;

wherein

in a case where the first access request from the playback controller is a request for requesting reading or writing in the local storage area, the data access controller causes the virtual-package-data file system processor to perform the reading or writing of the virtual package data with priority over the reading or writing of the application data by the file system processor.

2. The playback device of claim 1, wherein, in a case where the data access controller receives the first access request that requests reading or writing in the local storage area from the playback controller while the data access controller is causing the file system processor to perform the reading or writing of the application data according to the second access request from the processing execution unit, the data access controller cancels the reading or writing of the application data and causes the virtual-package-data file system processor to perform the reading or writing of the virtual package data according to the received first access request.

3. The playback device of claim 1, wherein, in a case where the data access controller is causing the virtual-package-data file system processor to perform the reading or writing of the virtual package data in the local storage area according to the first access request from the playback controller when the data access controller receives the second access request from the processing execution unit, the data access controller denies the received second access request.

4. The playback device of claim 1, wherein, in a case where the data access controller is causing the virtual-package-data file system processor to perform the reading or writing of the virtual package data in the local storage area according to the first access request from the playback controller when the data access controller receives the second access request from the processing execution unit, the data access controller causes the file system processor to perform the reading or writing of the application data if the application data to be read or written according to the received second access request have a size smaller than a predetermined size, and denies the received second access request if the application data to be read or written according to the received second access request have a size equal to or greater than the predetermined size.

5. The playback device of claim 1, wherein, in a case where the data access controller is causing the virtual-package-data file system processor to perform the reading or writing of the virtual package data in the local storage area according to the first access request from the playback controller when the data access controller receives the second access request from the processing execution unit, the data access controller causes the file system processor to perform the reading or writing of the application data on the basis of a priority level of the application data to be read or written according to the received second access request.

6. The playback device of claim 5, wherein the priority level increases in value with decreasing size of the application data.

7. The playback device of claim 1, wherein the first recording unit is configured by a drive unit into which a playback-only recording medium on which the first data are recorded is inserted, the drive unit being capable of reading the first data from the playback-only recording medium.

8. The playback device of claim 1, wherein the playback controller identifies the virtual package data to be played back;

the playback device further comprising a playback unit to play back the virtual package data identified by the playback controller.

9. The playback device of claim 8, wherein the playback device is equipped with a plurality of the playback controllers, the playback units, and the processing execution units.

10. A playback method comprising:

controlling playback of the virtual package data;

performing reading or writing of the virtual package data obtained by combining first data recorded in a first recording unit and second data recorded in a local storage area in a second recording unit according to a first access request;

processing application data recorded in an application data area in the second recording unit;

performing reading or writing of the application data recorded in the application data area in the second recording unit according to a second access request; and

in a case where the first access request is a request for requesting reading or writing in the local storage area, causing to perform the reading or writing of the virtual package data with priority over the reading or writing of the application data.

11. The playback method of claim 10, further comprising, in a case where the first access request that requests reading or writing in the local storage area is issued while the reading or writing of the application data are being performed canceling the reading or writing of the application data and reading or writing the virtual package data according to the issued first access request.

12. The playback method of claim 10, further comprising, in a case where the reading or writing of the virtual package data in the local storage area is being performed when the second access request is issued denying the issued second access request.

13. The playback method of claim 10, in a case where the reading or writing of the virtual package data in the local storage area is being performed when the second access request is issued performing the reading or writing of the application data to be read or written if the application data to be read or written according to the issued second access request have a size smaller than a predetermined size, and denying the received second access request if the application data to be read or written according to the issued second access request have a size equal to or greater than the predetermined size.

14. The playback method of claim 10, wherein, in a case where the reading or writing of the virtual package data in the local storage area is being performed when the second access request is issued performing the reading or writing of the application data to be read or written on the basis of a priority level of the application data to be read or written according to the issued second access request.

15. The playback method of claim 14, wherein the priority level increases in value with decreasing size of the application data.

16. The playback method of claim 10, wherein the first recording unit is configured by a drive unit into which a playback-only recording medium on which the first data are recorded is inserted, the drive unit being capable of reading the first data from the playback-only recording medium.