File generation apparatus, file generating method, file reproduction apparatus, and file reproducing method

Patent metadata

Field	Value
Publication number	US-9918099-B2
Application number	US-201414416396-A
Country	US
Kind code	B2
Filing date	Jul 10, 2014
Priority date	Jul 19, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present technique relates to a file generation apparatus, a file generating method, a file reproduction apparatus, and a file reproducing method capable of enabling a user to enjoy an HDR image.
HDR information designated by HDR designating information is acquired from a file storing a track of a stream including the HDR information which is configured with feature information representing features of luminance of an HDR (high dynamic range) image having a dynamic range higher than that of an STD (standard) image and conversion information representing a conversion rule of converting the one of the STD image and the HDR image into the other and a target track including the HDR designating information designating the HDR information which is to be applied to the target track of interest in the HDR information of the track. The present technique can be applied, for example, to the case of storing data of images of a subtitle or the like and HDR information which is to be applied to the images in an MP4 file or the like.

First claim

The invention claimed is:

1. A file generation apparatus comprising at least one processor programmed to:
receive at least one high dynamic range (HDR) image, the at least one HDR image having a dynamic range higher than that of a standard (STD) image; and
generate a file based on the at least one HDR image, the file comprising:
a target track including a plurality of sets of HDR information, wherein the plurality of sets of HDR information comprise a first set of HDR information comprising feature information representing features of luminance of the at least one HDR image, and a second set of HDR information comprising conversion information representing a conversion rule of converting one of the STD image and the at least one HDR image into the other; and
HDR designating information designating one or more sets of the plurality of sets of HDR information to be applied to the target track.

2. The file generation apparatus according to claim 1 , wherein the file is a file having a box structure.

3. The file generation apparatus according to claim 2 , wherein the file is an MP4file regulated in ISO/IEC 14496-14.

4. The file generation apparatus according to claim 3 , wherein the target track includes a tinf box (ToneMappingInformationBox), and at least one set of the plurality of sets of HDR information is stored in the tinf box.

5. The file generation apparatus according to claim 4 , wherein the target track includes a tirf box (ToneMappingInformationReferecenceBox), and the HDR designating information is stored in the tirf box.

6. The file generation apparatus according to claim 3 , wherein the plurality of sets of HDR information comprise a set of HDR information which is to be commonly applied to a plurality of components of the at least one HDR image, a set of HDR information which is to be applied to one component among the plurality of components of the at least one HDR image, or a set of HDR information which is to be applied to each of the plurality of components of the at least one HDR image.

7. A file generating method performed by at least one processor, the method comprising acts of:
receiving at least one high dynamic range (HDR) image, the at least one HDR image having a dynamic range higher than that of a standard (STD) image; and
generating a file based on the at least one HDR image, the file comprising:
a target track including a plurality of sets of HDR information, wherein the plurality of sets of HDR information comprise a first set of HDR information comprising feature information representing features of luminance of the at least one HDR image, and a second set of HDR information comprising conversion information representing a conversion rule of converting one of the STD image and the at least one HDR image into the other; and
HDR designating information designating one or more sets of the plurality of sets of HDR information to be applied to the target track.

8. A file reproduction apparatus comprising at least one processor programmed to:
receive a file, the file comprising:
a target track including a plurality of sets of high dynamic range (HDR) information, wherein the plurality of sets of HDR information comprise a first set of HDR information comprising feature information representing features of luminance of an HDR image having a dynamic range higher than that of a standard (STD) image, and a second set of HDR information comprising conversion information representing a conversion rule of converting one of the STD image and the HDR image into the other; and
HDR designating information designating one or more sets of the plurality of sets of HDR information to be applied to the target track;

acquire the HDR designating information from the file;
use the HDR designating information acquired from the file to acquire the one or more sets of the plurality of sets of HDR information from the target track; and
apply the one or more sets of the plurality of sets of HDR information to the target track.

9. The file reproduction apparatus according to claim 8 , wherein the file is a file having a box structure.

10. The file reproduction apparatus according to claim 9 , wherein the file is an MP4file regulated in ISO/IEC 14496-14.

11. The file reproduction apparatus according to claim 10 ,
wherein the target track includes a tinf box (ToneMappingInformationBox), and at least one set of the plurality of sets of HDR information is stored in the tinf box, and
wherein the at least one processor is programmed to acquire the at least one set of HDR information stored in the tinf box.

12. The file reproduction apparatus according to claim 11 ,
wherein the target track includes a tirf box (ToneMappingInformationReferecenceBox), and the HDR designating information is stored in the tirf box, and
wherein the at least one processor is programmed to acquire the HDR designating information stored in the tirf box.

13. The file reproduction apparatus according to claim 10 , wherein the plurality of sets of HDR information comprise a set of HDR information which is to be commonly applied to a plurality of components of the at least one HDR image, a set of HDR information which is to be applied to one component among the plurality of components of the at least one HDR image, or a set of HDR information which is to be applied to each of the plurality of components of the at least one HDR image.

14. A file reproducing method performed by at least one processor, the method comprising acts of:
receiving a file, the file comprising:
a target track including a plurality of sets of high dynamic range (HDR) information, wherein the plurality of sets of HDR information comprise a first set of HDR information comprising feature information representing features of luminance of an HDR image having a dynamic range higher than that of a standard (STD) image, and a second set of HDR information comprising conversion information representing a conversion rule of converting one of the STD image and the HDR image into the other; and
HDR designating information designating one or more sets of the plurality of sets of HDR information to be applied to the target track;

acquiring the HDR designating information from the file;
using the HDR designating information acquired from the file to acquire the one or more sets of the plurality of sets of HDR information from the target track; and
applying the one or more sets of the plurality of sets of HDR information to the target track.

15. A file generation apparatus comprising at least one processor programmed to:
receive at least one high dynamic range (HDR) image, the at least one HDR image having a dynamic range higher than that of a standard (STD) image; and
generate a file based on the at least one HDR image, the file comprising:
an HDR information track comprising a plurality of sets of HDR information, wherein the plurality of sets of HDR information comprise a first set of HDR information comprising feature information representing features of luminance of the at least one HDR image, and a second set of HDR information comprising conversion information representing a conversion rule of converting one of the STD image and the at least one HDR image into the other; and
a target track including:
track designating information designating the HDR information track; and
HDR designating information designating one or more sets of the plurality of sets of HDR information to be applied to the target track.

16. The file generation apparatus according to claim 15 , wherein the file is a file having a box structure.

Assignees

• Sony Corp

Inventors

• Takahashi Ryohei
• Uchimura Kouichi
• Hattori Shinobu

Classifications

• G11B20/10

  Digital recording or reproducing · CPC title

• H04N21/4402

  involving reformatting operations of video signals for household redistribution, storage or real-time display {(details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764)} · CPC title

• H04N19/46 Primary

  Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) · CPC title

• H04N7/0117

  involving conversion of the spatial resolution of the incoming video signal (for graphics images G09G2340/0407) · CPC title

• H04N21/85406

  involving a specific file format, e.g. MP4 format · CPC title