CN2390257Y

CN2390257Y - High-density laser video disc

Info

Publication number: CN2390257Y
Application number: CN 99211797
Authority: CN
Inventors: 欧茂华; 陈勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-24
Filing date: 1999-05-24
Publication date: 2000-08-02
Anticipated expiration: 2009-05-24

Abstract

The utility model relates to a disc of a high-density laser video disk through changing information stripe pitch to enhance data storage density of the disc, which is characterized in that the pitch of the high-density video disk can be obtained by the formula * d=1.2 mu m+-0.1 mu m *, and the data capacity of the utility model is increased from 650Mb to 1Gb; the playing time of one video disk is prolonged from 74 minutes to 90 minutes, and moreover, a movie with one and a half hours can be stored in one disc, and thereby, the cost of the disc and the packing fees are lowered, and meanwhile, the trouble of changing discs in the course of playing is also avoided. The high-density video disk of the utility model just enhance the density that the video disk records data, and does not change the compression format and does not reduce the data quantity, and therefore, the utility model can be compatible with various conventional video disc players, and the playing quality is guaranteed.

Description

EVD

The utility model relates to a kind of laser disc, particularly a kind of EVD disc that improves the disc data storage density by change information line pitch.

Along with the development of technology such as VCD, SVCD, CVD, the talk endlessly play quality of machine of family expenses shadow comprises that the sound and the quality of image all improve constantly, but is subjected to the talk endlessly restriction of machine-readable dish ability of data compression technique and shadow, and the quantity of information of image that every CD is deposited is restricted.At present, the memory data output of general videodisc is 650MB, and information line pitch d is 1.6 μ m, and the time of playing video is 74 minutes (as shown in Figure 1).Like this, a feature film of 90 minutes needs two sheet storages of talking endlessly, and needs to change dish in the middle of the broadcast.

Under compatibility existing VCD, SVCD, CVD shadow were talked endlessly the prerequisite of player, the memory space that how further to improve optic disk was the technical barrier that needs to be resolved hurrily, the inventor through studying for a long period of time, experiment has proposed more satisfactory technical solution finally repeatedly.

The purpose of this utility model is to improve a kind of EVD disc, improves information storage effectively by improving information storage density.

The purpose of this utility model is achieved in that and comprises data area and white space on the optic disk with conventional physical dimension that the technical solution of the utility model is that the pitch d between the information line mark in the data area is narrowed down to 1.2 μ m ± 0.1 μ m.The data area packing density of so same area increases, and can store more data.

The utility model has the advantages that: memory data output improves, and its data capacity is brought up to 1Gb by 650Mb; An optic disk reproduction time extended to 90 minutes by 74 minutes; And then a film of one and a half hours can be stored on the one disc, and the cost that has reduced disc has also reduced the expense of packing, the trouble of having changed dish in also having avoided simultaneously playing; And the application's high density optic disk has just improved the density of optic disk record data, does not promptly change compressed format and does not also reduce data volume, so its machine of can compatible various conventional shadows talking endlessly, and play quality has also obtained guarantee.

Below in conjunction with accompanying drawing the technical solution of the utility model is further described.

Fig. 1 is conventional optic disk (part).

Fig. 2 is according to high density optic disk of the present utility model (part).

Among the figure: the 1-data area; The 2-white space; 3-information line (hole groove); The d-pitch.

As shown in the figure, in the data area of conventional laser optic disk, by information line (hole groove) record data, the distance between the information line is called pitch d, general d=1.6 μ m.The data capacity of one disc record is 650Mb, if the image data of storage can be play 74 minutes.

The technical solution of the utility model is that the physical dimension of high density optic disk is identical with the conventional laser CD, by dwindling the distance of pitch d, improves the density of data storage of disc.Pitch d=1.2 μ m of the present utility model ± 0.1 μ m, the one disc data storage capacity is 1Gb thus, the reproduction time of optic disk image extends to 90 minutes.

In the utility model, the compression method of audio-visual data and the physical format of signal are identical with conventional optic disk, do not do any change, just improved disc information line pitch density, therefore it is compatible with present any conventional shadow machine (VCD player, SVCD player etc.) of talking endlessly, and the machine sowing of talking endlessly is put the quality of image and do not produced any influence to conventional shadow.What EVD of the present utility model was claimed only is shape, the structure of disc itself, particularly to the improvement of information line pitch.

In order to guarantee the needs of the utility model production, must carry out necessary improvement to conventional laser disc production technology and relevant devices.These improvement comprise, the operation of making a plate in advance, plate-making process and equipment etc.For example, change the audiovisual materials of originally compression being got well and be burnt to the technology of transcribing the plate-making of taking away on the 8mm digital belt on the CD-ROM dish more earlier.Because the data of 1Gb can not be write any more in a CD-ROM, directly write on the 8mm master tape so will adopt new method will compress good audiovisual materials.In addition, the requirement of dwindling of pitch has the better laser cutter of focusing, more accurate servo-control system.For obtaining better information groove, on platen technology, also to improve, adjust to best injection pressure and dwell time etc.Produce high density optic disk of the present utility model, under assurance disc technical request, can realize by different production methods and technology.

Claims

A kind of EVD has on the optic disk of conventional physical dimension and comprises disc data zone (1) and white space (2), it is characterized in that the pitch d=1.2 μ m between the information line (3) ± 0.1 μ m in the data area.