CN101059995B - Information storage medium storing multi angle data, and recording method and reproducing apparatus thereof - Google Patents

Abstract

An information storage medium for storing multi angle data, and a recording method and a reproducing apparatus thereof. The information storage medium stores data for a plurality of angles of a scene in interleaved blocks. Sizes of the interleaved blocks are integral multiples of sizes of integral numbered aligned units that include packets. Angle change points are included in each of the interleaved blocks which allows a reproducing apparatus to seamlessly jump from one angle to another angle during reproduction of the multi angle data. A number of the angle points recorded on the information storage medium is computed so that a jumping distance required by the data during reproduction does not exceed a maximum jumping distance of a reproducing apparatus.

Description

Information storage medium and the recording method and the reproducer thereof of storage data of multiple angles

The application is to be that July 6, application number in 2004 are 200480002849.7, are entitled as the dividing an application of patented claim of " information storage medium and the recording method and the reproducer thereof of storage data of multiple angles " applying date.

Technical field

The present invention relates to when coding and/or the data of multiple angles that uses during the decoded video object data; More particularly, relate to that a kind of method of storing the information storage medium of data of multiple angles, a kind of record and/or multi-angle data reproducing and a kind of is used to write down and/equipment of multi-angle data reproducing.

Background technology

Obtain data of multiple angles through encoding with the several camera photographed scenes and the result that will take in different angles.When expecting to change the viewing angle of the scene of taking during the reproduction of content that is comprising data of multiple angles, angle changes order and is sent to reproducer, and reproducer is reproduced in the data of the scene of desired angle shooting in response to this order.For angle changes, data of multiple angles is divided into scheduled unit and this unit to be used and interweaves and by record alternately.

Therefore, the pick-up of reproducer must jump to other position so that when reading the data of multiple angles that uses the record that interweaves, also reproduce the piece that interweaves an angular detection, perhaps accomplishes angle and changes.Yet the increase of the size of the piece that interweaves causes the pick-up of current location and reproducer to change the increase of the distance between the position that must jump to for angle.In the case, do not guarantee seamless-reproduced.On the contrary, if the size of the piece that interweaves is very little, then during the data reproduction that does not need angle to change, frequently need the jump of the pick-up of reproducer.Therefore, suitably the size of the piece that interweaves of adjustment is important.

And the jump that the permission reproducer jumps at other piece that interweaves of different angles can be set in the piece that interweaves.In the case, thus the sum of jump must be confirmed that data of multiple angles can effectively reproduce by suitable.

Summary of the invention

The present invention provides a kind of data of multiple angles that records on it with the method that allows seamless-reproduced information storage medium and record and/or multi-angle data reproducing be used to write down and/or the equipment of multi-angle data reproducing.

The present invention also provides the method for the sum of the angle points that a kind of definite permission reproducer jumps the reproduction position in the piece that interweaves with change.

As stated, according to the present invention, thereby data of multiple angles can be seamless-reproduced by effective record data of multiple angles under the situation that does not have pick-up too much to jump for data reproduction.

Description of drawings

Figure 1A illustrates first angle data files;

Figure 1B illustrates second angle data files

Fig. 1 C illustrates and uses record first and second angle data files that interweave;

Fig. 2 illustrates the data of multiple angles that is recorded in the Fig. 1 on the information storage medium;

Fig. 3 is the block scheme according to the reproducer that is used for seamless-reproduced data of the embodiment of the invention;

Fig. 4 is illustrated in the diagrammatic sketch that is stored in some data in the read buffer during the jump of pick-up;

Fig. 5 illustrates the interweave structure of the clip file that realizes that data of multiple angles writes down of use according to the embodiment of the invention; And

Fig. 6 be according between two angle points of calculating of the embodiment of the invention apart from S _{ANGLE_POINTS}And the length S of scope (extent) _EXTENTThe process flow diagram of method.

Embodiment

According to an aspect of the present invention; A kind of information storage medium that records the data of multiple angles of at least one unit that comprises angle-data on it is provided; Wherein, data of multiple angles comprises the piece that interweaves, and each piece that interweaves comprises the bag of at least one predetermined size; And the data of an angle are the unit quilt and the data interlacing of at least one other angle with the piece that interweaves, and the size of the piece that interweaves is the integral multiple of size that comprises an integer unit of aiming at of bag.

Each piece that interweaves can comprise that at least one allows reproducer jumping to the angle points that continues data reproduction when other reproduces the position at the reproduction period of angle-data, can be included in the integral multiple of the quantity of the angle points in each piece that interweaves for the quantity of the unit of aligning.

According to a further aspect in the invention; Provide a kind of use to interweave and write down the method for the data of multiple angles that comprises the piece that interweaves; Each piece that interweaves comprises that at least one allows reproducer during data reproduction, to jump to the angle points that other reproduces the position, and this method comprises: calculate the distance between the angle points; Compensation calculated distance and comprise the skew between the reproduction length of bag of the piece that each interweaves; Calculate the maximum quantity of the angle points in the unit that interweaves that when reproducer can jump to it during data reproduction the longest possible skip distance is less than or equal to the maximum hop distance that is provided by reproducer, obtains; And process the piece that interweaves, and data of multiple angles is recorded on the piece that interweaves based on the quantity of distance between the angle points and angle points.

According to a further aspect in the invention; Provide a kind of reproduction to be stored in the equipment of the data of multiple angles in the piece that interweaves; Each piece that interweaves comprises that at least one allows this equipment during data reproduction, to jump to the angle points that other reproduces the position, and this equipment comprises: read the unit, it reads data of multiple angles; And impact damper; The data of multiple angles that its storage is read; Wherein, data of multiple angles comprises the piece that interweaves, and each piece that interweaves comprises the bag of at least one predetermined size; And the angle-data of an angle is to interweave with the angle-data of at least one other angle in the unit with the piece that interweaves, and the size of the piece that interweaves is the integral multiple of size that comprises an integer unit of aiming at of bag.

Confirm the data length of each piece based on the maximum hopping time of the expectation of the quantity of a plurality of angles and reproducer.

Calculate the maximum quantity of angle points based on the quantity of the data length of the maximum hopping time of the supposition of reproducer, each piece and a plurality of angles.

Now, be shown in the embodiments of the invention in the accompanying drawing with specifying its example, wherein, identical label refers to components identical all the time.Embodiment is described with reference to the accompanying drawings to explain the present invention.

Figure 1A-1C illustrates the data of multiple angles that uses the record that interweaves.Data of multiple angles comprises first angle data files 110 shown in Figure 1A that comprises audio/video (AV) data that are used for all angles and second angle data files 120 shown in Figure 1B.For angular views changes fast, first and second angle data files 110 and 120 alternately and continuously are recorded in the zone 130 of the information storage medium shown in Fig. 1 C.In other words, first and second angle data files 110 and 120 are divided into scheduled unit, and use the next recording scheduled unit that interweaves.Therefore, when angular views is changed, do not need the pick-up of reproducer to move the next angle reading of data of very big distance, therefore guaranteed seamless-reproduced to change.

Be included in and use the scheduled unit that is recorded in each angle-data in the data on the information storage medium that interweaves to be known as scope.Under the situation of digital versatile disc-video (DVD-VIDEO), the unit that scope equals to interweave.That is, scope is recorded in the data in the file system with representing not have pause.Therefore, for data reproduction, need the pick-up of reproducer to jump to other scope for reading of data accurately.

Fig. 2 illustrates the data that interweave of Figure 1A-1C that is recorded on the information storage medium 200.The expression of AV stream comprises the bit stream of multiple source bag.The source bag is 192 byte packet that comprise 188 byte mpeg 2 transport streams (TS) and 4 byte packet header.Usually, data storage is in the sector location of information storage medium.The sector is the elementary cell of log file.Usually, the sector that is stored among the DVD is 2048 byte longs.Therefore, a sector is made up of the multiple source bag.

Fig. 3 is the simplified block diagram that is used for the reproducer of seamless-reproduced data.With reference to Fig. 3, be stored in data in the information storage medium and read unit 310 and read, and the data that read are sent to read buffer 330 via demodulating unit 320.Read buffer 330 is used to cushion the bit stream that will be sent to demoder, therefore, even also guarantee seamless-reproduced during the jump of the pick-up 305 of the use of this impact damper in reading unit 310.Source de-packetizer 340 will comprise that the bit stream of multiple source bag converts MPEG-2TS bag and output MPEG-2TS bag into.

The parameter relevant with buffering is following:

(a) R _UD: via demodulating unit 320 from reading the data rate that unit 310 is sent to the data of read buffer 330;

(b) R _TS: the maximal value of the code rate TS_recording_rate of MPEG-2TS promptly, outputs to data the speed of demoder;

(c) R _MAX: the Maximum Bit Rate of source bag stream.MPEG-2TS bag is 188 byte longs and 4 byte packet header is included in bag stream in formation source in the MPEG-2TS bag.Therefore, Maximum Bit Rate R _MAXEqual (192/188) ' R _TS

Suppose the data B that outputs to demoder with speed TS_recording_rate from read buffer 330 _OCCUPIEDSatisfy formula 1, even work as in time T _JUMPWhen data can't be stored in read buffer 330, can not cause the underflow of read buffer 330 yet.

$B_{\mathrm{OCCUPIED}}\≥\frac{T_{\mathrm{JUMP}}\left(\mathrm{ms}\right)}{1000}\×\frac{192}{188}\×\mathrm{TS}\_\mathrm{recording}\_\mathrm{rate}...\left(1\right)$

Fig. 4 is illustrated in the diagrammatic sketch that is stored in some data in the read buffer 300 during the jump of pick-up 305.In Fig. 4, T _JUMPExpression hopping time, i.e. access time T _ACCESSWith read the required time T of two error correcting codes (ECC) _OVERHEADWith.That is T, _JUMP=T _ACCESS+ T _OVERHEAD, and T _OVERHEAD(ms)≤{ 2x ECC (byte)/R _UD(bps) }.

When reading the data that are stored in the information storage medium, fill read buffer 330 with the data that read.Before pick-up jumps to reposition, must be to fill read buffer 330, so that prevent the underflow of read buffer 330 suc as formula (1) predetermined data.That is,, before the jump of pick-up, must read the length S of the data of read buffer 330 in order to prevent the underflow of read buffer 330 _READMust satisfy formula (2).

$S_{\mathrm{READ}}\left(\mathrm{bit}\right)\≥\frac{T_{\mathrm{JUMP}}\left(\mathrm{ms}\right)\×R_{\mathrm{UD}}}{1000}\×\frac{\mathrm{TS}\_\mathrm{recording}\_\mathrm{rate}\left(\mathrm{bps}\right)\×192}{R_{\mathrm{UD}}\left(\mathrm{bps}\right)\×188-\mathrm{TS}\_\mathrm{recording}\_\mathrm{rate}\left(\mathrm{bps}\right)\×192}...\left(2\right)$

Fig. 5 illustrates the structure of the clip file that using interweaves realizes that data of multiple angles writes down.

As stated, all angles data of an angle are interleaved in the angle-data of at least one other angle and are used for the response time that angle changes with minimizing, therefore seamlessly change angle.As a result, not only change needs to jump for angle, and also needs to jump for the normal playback in same angle, so that detect and reproduction desired angle data.The piece that interweaves is considered to the scope of clip file.Scope can comprise that a plurality of permission pick-ups jump to the angle points of other angle-data.Therefore, with the sector be the length S of the scope of unit _EXTENTAnd between two angle points apart from S _{ANGLE_POINTS}Must satisfy formula (3).

$S_{\mathrm{EXTENT}}\left(\sec \mathrm{tors}\right)=\mathrm{INT}\left\{(\underset{\mathrm{in}\_\mathrm{one}\_\mathrm{extent}}{\mathrm{\Σ}}{S}_{\mathrm{ANGLE}\_\mathrm{POINTS}}+6144-192)\right\}/6144\}\×3...\left(3\right)$

The clip file of the data of multiple angles shown in Fig. 5 has with limit:

(i) clip file must be positioned at one deck;

(ii) the scope of multi-angle stream must begin with angle points, and aims at the unit of aiming at.If with the MPTS complete filling of input, then the un-occupied space of the last unit of aiming at is not filled with the sky bag in the unit of the last aligning of scope;

(iii) each is apart from S _{ANGLE_POINT}Be the integral multiple of the length of source bag, for example, the integral multiple of 192 bytes; And

The (iv) length S of scope _EXTENT, the angle points in scope sum and angle change the time must to observe the buffer occupancy that in formula (1) and (2), defines regular.Shown in the example of buffer parameter such as following table 1 and 2.

Between two angle points apart from S _{ANGLE_POINTS}Length S than scope _EXTENTShort, and when the current angle points from the active cell of angle-data jumps to the angle points farthest in the next unit of angle-data, obtain to be used for the access time T of angle change _ACCESSMaximal value.Unit of angle data can refer to a plurality of with same corresponding data of time, and wherein, the data of each piece and all angles are corresponding.With reference to Fig. 5, data angle 1-1, angle 2-1 and angle 3-1 can be considered to the active cell of angle-data, and data angle 1-2 angle 2-2 and angle 3-2 can be considered to the next unit of angle-data.Change order if receive angle before the angle points 520 after arriving angle points 510, then after the remaining data that reproduces angle 1-1, when the last angle points 520 from angle 1-1 jumps to first angle points 530 of angle 3-2, obtain access time T _ACCESSMaximal value.

If several angle points are set in scope, the length S among Fig. 4 then _READEqual apart from S _{ANGLE_POINTS}In the case, formula (2) can be expressed as followsin:

$S_{\mathrm{ANGLE}\_\mathrm{POINTS}}\left(\mathrm{bit}\right)\≥\frac{T_{\mathrm{JUMP}}\left(\mathrm{ms}\right)\×R_{\mathrm{UD}}\left(\mathrm{bps}\right)}{1000}\×\frac{\mathrm{TS}\_\mathrm{recording}\_\mathrm{rate}\left(\mathrm{bps}\right)\×192}{R_{\mathrm{UD}}\left(\mathrm{bps}\right)\×188-\mathrm{TS}\_\mathrm{recording}\_\mathrm{rate}\left(\mathrm{bps}\right)\×192}$

Fig. 6 be illustrate according between two angle points of calculating of the embodiment of the invention apart from S _{ANGLE_POINTS}Length S with scope _EXTENTThe process flow diagram of method.With reference to Fig. 6, use formula (3) is with given access time T _ACCESSWith data output speed TS_recording_rate computed range S _{ANGLE_POINTS}(S610).Next, length A and the B of the data of reproducing with data output speed TS_recording_rate that is used for 500ms and 1000ms is by calculating (S620) respectively.Since the distance between the image sets (GOP) according to Moving Picture Experts Group-2 between 500ms and 1000ms, so the distance between the angle points preferably is arranged between 500ms and the 1000ms.Thereafter, apart from S _{ANGLE_POINTS}Quilt compares (S630) with length A and B.If apart from S _{ANGLE_POINTS}≤length A is then apart from S _{ANGLE_POINTS}Be determined and equal length A, and if A＜apart from S _{ANGLE_POINTS}≤length B is then apart from S _{ANGLE_POINTS}Be determined and equal length B (S630).

Next, calculate the longest satisfied skip distance and be used for given access time T less than (＜) _ACCESSThe unit that interweaves of maximum hop distance in the maximum quantity M (S640) of angle points.Because the available maximum hop distance of reproducer is by the reproducer setting, the longest skip distance is by passing through 2 ' (angle number-1) ' M ' S _{ANGLE_POINTS}Calculate.Therefore, can use the longest skip distance of calculating to calculate maximum quantity M.Thereafter, the length S of scope _EXTENTEqual INT ' 3 and have M angle points.

Consider between two angle points and jump, its each all and the corresponding angle-unit of data between two angle points in unit of angle data preferably with sector alignment.

Table 1 and 2 shows the length S of the scope of using said method calculating _EXTENTAnd between two angle points apart from S _{ANGLE_POINTS}The example of value.Say that at length table 1 shows the length S when with three angle shot scenes _EXTENTWith apart from S _{ANGLE_POINTS}The example of value.Table 2 shows the length S when with nine angle shot scenes _EXTENTWith apart from S _{ANGLE_POINTS}The example of value.

Table 1

Table 2

Usually, the scope of file is with sector alignment.According to the present invention, the source bag is 192 byte longs, therefore can not be with the sector alignment of 2048 bytes.Therefore, three continuous sectors are grouped into an addressed location.The addressed location of three sectors is minimum units that the integral multiple of the wherein length of source bag equals the length of this addressed location.In other words, have under the situation of 2048 byte lengths a sector, the length of 32 source bags equals three sectors, that is, and and the length of an addressed location.

The present invention can be implemented as computer program.In the case, can be easily derive as the code of member of the present invention and code segment by the computer programmer of technical field under the present invention.And this computer program can be stored in the computer-readable medium.When this computer program was read and is carried out by computing machine, the method for record data of multiple angles was done.Computer-readable medium can be any medium, such as magnetic recording media, optical record medium and carrier media.

Although some embodiments of the present invention are illustrated and describe,, it should be appreciated by those skilled in the art that under the situation that does not break away from principle of the present invention and spirit and can change in an embodiment that scope of the present invention is limited claim and equivalent thereof.

Claims (1)

1. a storage is used for from the method for the data of a plurality of different angles reconstruction of scenes, and this method comprises:

Obtain and the corresponding data of scene from each of a plurality of angles; And

With the piece that interweaves with data storage on recording medium, wherein, the data of each piece comprise:

From the data of one of all angles reconstruction of scenes, and

The quantity data that is used for angle points, angle points represent that reproducer can optionally be indicated the point that jumps to the data in another of a plurality of from this point and/or to this from the data one of a plurality of, wherein:

Each angle points with each sector of recording medium begin aim at, and

The data of each piece comprise the quantity of bag of data of sum of byte of the integral multiple of the recording capacity with sector that equals recording medium.

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