Video metadata correction apparatus and method

• US 20070130175A1
• Filed: 03/28/2006
• Published: 06/07/2007
• Est. Priority Date: 12/05/2005
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Morimatsu, Eishi, Mizutani, Masami, Kaneko, Soutaro
• Granted Patent: US 7,801,927 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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: H04N 21/42202 environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• 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 5/91 Television signal processing therefor
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

This invention is to provide a technique for properly correcting video metadata related to and synchronized with the video. This video metadata correction apparatus includes: a section identification unit that identifies a section including incorrect video metadata based on information concerning video metadata in a first video metadata storage for storing the information concerning the video metadata as sensor information synchronized with video and a first video feature value, which correlates with the information concerning the video metadata and is extracted from the video; and a corrector that corrects the video metadata in the identified section based on the first video feature value or a second video feature value, which correlates with the information concerning the video metadata and is extracted from the video. In this manner, only an incorrectly measured part can be corrected in an effective manner.

Claims

1. A video metadata correction apparatus, comprising:

a section identification unit that identifies a section including incorrect video metadata based on information concerning video metadata in a first video metadata storage for storing said information concerning said video metadata as sensor information synchronized with video and a first video feature value, which correlates with said information concerning said video metadata and is extracted from said video; and

a corrector that corrects said video metadata in the identified section based on said first video feature value or a second video feature value, which correlates with said information concerning said video metadata and is extracted from said video, and stores the corrected video metadata into a second video metadata storage.

2. The video metadata correction apparatus as set forth in claim 1,

wherein said information concerning said video metadata is a change amount of said video metadata, and

said section identification unit comprises a unit that extracts a candidate section including said incorrect video metadata based on change of said change amount of said video metadata with respect to time.

3. The video metadata correction apparatus as set forth in claim 1, wherein said section identification unit comprises a unit that extracts a feature value correlating with said information concerning said video metadata and according to change of said video with respect to time as said first video feature value from time-series data of said video.

4. The video metadata correction apparatus as set forth in claim 1, wherein said section identification unit comprises a unit that judges whether or not a coefficient of a function including a residual at a same time between said information concerning said video metadata in a specific section and said first video feature value, by which said function is minimized, is within a predetermined range.

5. The video metadata correction apparatus as set forth in claim 1, wherein said corrector comprises a unit that calculates a correction amount of the video metadata, which is proportional to a change amount of the first video feature value or the second video feature value.

6. The video metadata correction apparatus as set forth in claim 1, wherein said corrector comprises a unit that calculates a correction amount of said video metadata so as to smoothly change said video metadata according to a change amount of said first second video feature value or said second video feature value.

7. The video metadata correction apparatus as set forth in claim 1, wherein said corrector comprises a unit that calculates a correction amount of said video metadata, which is proportional to a change amount of said first video feature value or said second video feature value and used to continuously connect the identified section and its preceding and following sections or a correction section and its preceding and following sections, said correction section including the identified section and at least its preceding or following subsection.

8. The video metadata correction apparatus as set forth in claim 1, wherein said sensor information is at least either of a value from an azimuth angle sensor and position information from a GPS.

9. A video metadata recording apparatus, comprising:

said video metadata correction apparatus as set forth in claim 1;

a video data storage that stores data of said video;

a camera that shoots said data of said video to stores said data into said video data storage;

a sensor that obtains said sensor information and stores said sensor information into said first video metadata storage.

10. A terminal apparatus, comprising:

said video metadata correction apparatus as set forth in claim 1;

a video data storage that stores data of said video;

a map database that stores data of map elements at each position;

a unit that reads out video stored in said video data storage and said video metadata that is stored in said second video metadata storage and is synchronized with said video, searches said map database by said video metadata to read out data of a corresponding map element, and displays said data of said corresponding map element on a display device.

11. A video metadata correction method, comprising:

identifying a section including incorrect video metadata based on information concerning video metadata in a first video metadata storage for storing said information concerning said video metadata as sensor information synchronized with video and a first video feature value, which correlates with said information concerning said video metadata and is extracted from said video; and

correcting said video metadata in the identified section based on said first video feature value or a second video feature value, which correlates with said information concerning said video metadata and is extracted from said video, and storing the corrected video metadata into a second video metadata storage.

12. A video metadata correction program embodied on a medium, said video metadata correction program, comprising:

identifying a section including incorrect video metadata based on information concerning video metadata in a first video metadata storage for storing said information concerning said video metadata as sensor information synchronized with video and a first video feature value, which correlates with said information concerning said video metadata and is extracted from said video; and

correcting said video metadata in the identified section based on said first video feature value or a second video feature value, which correlates with said information concerning said video metadata and is extracted from said video, and storing the corrected video metadata into a second video metadata storage.