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Image recording/reproducing device and method disc and image reproducing device

A technology of a video recording and reproducing device, applied in the directions of digital recording/reproducing, data recording, recording information storage, etc., can solve problems such as time-consuming, processing time, metadata user waiting, etc.

Inactive Publication Date: 2007-08-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, after the JPEG file is recorded, additional information is added, and thereafter, when the additional information is retrieved from multiple JPEG files, the pickup is searched every time the additional information of one file is obtained, and processing takes a lot of time. question
[0010] As described above, it takes time to add metadata and the like in the video recording and playback device, and the user has to wait for metadata retrieval.

Method used

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  • Image recording/reproducing device and method disc and image reproducing device
  • Image recording/reproducing device and method disc and image reproducing device
  • Image recording/reproducing device and method disc and image reproducing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] FIG. 1 is a block diagram of a video recording and reproducing apparatus according to Embodiment 1 of the present invention. If the release button (not shown) is pressed, the recording control unit 108 performs JPEG compression on the still image generated in the video signal input unit 100 in the JPEG compression unit 101, and the DQT marker segment, The DHT marker segment, SOF marker segment, SOS marker segment, compressed data and EOI marker are recorded on the optical disc 111 . Next, the recording control unit 108 activates the JPEG header combining unit 102 to record the SOI marker, APP1 marker segment, APP5 marker segment, and COM (comment) marker segment. Furthermore, the recording control unit 108 records file management information so that each marker segment of SOI, APP1, APP5, and COM, each marker segment of DQT, DHT, SOF, and SOS, compressed data, and EOI segment are handled as one file. On the other hand, the metadata additional recording control unit 110...

Embodiment 2

[0092] FIG. 6 shows an example in which the data structure shown in FIG. 3 is slightly changed. The difference is that the data arrangement of the SOF flag segment is shifted from area B (second area) to area A (first area). In the DCF basic file, only the SOF flag segment describes the number of pixels and color samples (4:2:2 / 4:2:0, etc.) of the recorded still image. Thereby, when searching and sorting with the number of pixels and the number of color samples throughout a plurality of JPEG files, since the SOF marker segment is stored in the buffer memory, compared with the case where there is a considerable part of the area B (the second area), the improvement can be significantly improved. processing time. Therefore, for example, when the worst-case movement time at the time of search is 1 second, the processing time can be reduced by the same number of seconds as the maximum number of search target files. In addition, the FID is not recorded together with the part (phys...

Embodiment 3

[0094] Fig. 7 shows the situation of recording a DCF basic file including APP1 marker segment and APP2 marker segment according to the DCF specification. In the APP2 flag segment, information for facilitating the conversion from the DCF basic file to the FlashPix file format is stored. Since the data size is often larger than APP1 (for example, 64K bytes), it is difficult to become a search object and the area A (the first area) is limited, so the APP2 marker segment should not be stored in a considerable part of the area A (the first area). Therefore, the data size of APP2 on the compressed area A (the first area) is recorded up to the sector boundary (thus, the data size of APP2 is usually less than 1 sector), and the rest is recorded in the area B (the second area). part. At this time, the same APP5 marker segment and COM marker segment as in the first embodiment are recorded up to the sector boundary. When adding the APP4 flag segment, it can be configured behind the COM...

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Abstract

A video recording / reproducing device / method is provided, which allows ancillary information to be added to a JPEG file recorded on an optical disk within a short time, and keeps the display speed of images even after the addition of the ancillary information. Address information (offset value) for skipping retrieval information (application data: APP4) is pre-recorded in an APP5 marker segment so as to be positioned ahead of the retrieval information, and compressed data are read directly by referring to the address information without reading the retrieval information when a static image is to be displayed.

Description

technical field [0001] The present invention relates to a video recording and reproducing apparatus and method for JPEG-compressing still images and recording them on a recording medium such as an optical disc, a disc for recording JPEG-compressed still images, and a video reproducing apparatus for reproducing still images from the disc. Background technique [0002] In recent video recording and playback devices, still images are compressed by JPEG (Joint Photographic Experts Group: Joint Photographic Experts Group) to conform to the DCF basic file of the DCF specification (Design rule for Camera File System: Japan Electronics Industry Promotion Association specification) recorded to the recording medium in the file format. The data structure of the DCF basic file adopts SOI (start of image: image start), APP1 (application data 1), DQT (define quantization table: define quantization table), DHT (define Hofmann table: define Hofmann table) defined by JPEG specification Tabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/92G11B27/00G11B27/10G11B27/32G11B27/30H04N1/21H04N5/85H04N9/804H04N9/82
CPCH04N5/85G11B2220/2575G11B27/105H04N2201/3212G11B2220/2562H04N2201/3274H04N9/8047G11B2220/216H04N1/212G11B27/329G11B2220/2545G11B2220/218H04N2201/3225H04N9/8205G11B2220/2525G11B27/3027G11B20/10
Inventor 伊藤正纪
Owner PANASONIC CORP
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