CN85102152A - A kind of broadcast is stored in the system of the image content on the disc-like record carrier - Google Patents

Abstract

For the picture of film standard be can be used for prolong reproduction time as the video picture (the two number of pictures per second is inequality) of television standard, in order to realize making every circle channel solidify the realization of image, in order to be inserted in a footpath upwards resembling number, suggestion is recorded in every width of cloth mute on one circle of disk by two video fields, the video number of fields that allows per second play conforms to the per second mute number of regulation, and this moves forward and backward the scanning element realization by certain format when playing disc recording.

Description

A kind of broadcast is stored in the system of the image content on the disc-like record carrier

This invention is to be recorded in the system that the continuous mute on the disc-like record carrier plays back again about a kind of handle, it has the reading device of a scanning disc-like record carrier, and the information track of spirality or annular concentric is arranged on the record carrier, image is with the vision signal form, remember in turn in information track by two of per pass, require to play several frames in the unit interval.In order to produce and the same broadcasting speed of former frame speed, the required broadcasting speed of record carrier is a unit interval m video image that is made of two fields, and m＞n, reading device constantly changes the scanning element to record carrier, basically be to move forward and backward in the radial direction, the distance that moves is identical with the radial displacement of going around at least.

This invention also relates to a kind of reading device and a kind of record carrier, and they all are used for the related system of this invention.

Such system is introduced on No. the 7702874th, Netherlands patent applications.

Said this record carrier tends to provide recorded content by factory substantially, therefore is to offer the consumer as the record carrier that record is good in advance.The content that is recorded in this record carrier in advance most possibly is a movie program, because the source is wide, and capacity is also very big.If the image content of a film is intended for use this record carrier, be invested in American market, cause a lot of complicated results so because the standard of the film images that plays back is different with the TV image standard.For example, the standard that is used for film should be with per second 24 frame recordings and broadcast.For this film image content being converted to the vision signal that is suitable for being recorded on the said this disc-like record carrier, to the form scanning consistent of every frame film image with the interlacing scan type.Yet by U.S.'s television standard, must play, like this,, can not be transformed into a television image to a frame film images because it is not right to play the speed of recorded content with per second 30 frame speeds.By film pick-up being programmed to obtain required adaptation processing, so that the film images of consecutive numbers frame becomes the signal of vision signal and three field groups of a series of two compositions.In other words, 2 frame film images are converted to 5 fields or 4 frame films are converted to 10 fields or 5 television images, so just consistent with (film standard is become television standard) 24/30 this conversion.

Under the still frame mode, when record carrier whenever revolves when turning around, make scanning position radially move inward an information track spacing by means of deviation approach, so just can be to the continuous sweep of same spirality information track.Because just write down two fields in the sub-district of an information track, they lump together and form an interleaved television image, so under the still frame mode, play the TV signal that is write down continuously and just form a picture.If the reading device of scanning disc-like record carrier is to work, will find that on record carrier, when playing again with this carrier, effect is always not desirable one group of TV programme picture record for the method for stating in the use under the still frame mode.Generally speaking, the television image that plays out under the still frame mode is unintelligible, and to some image, the picture of broadcast even be beyond recognition.This is because every frame film images becomes two fields and three fields successively when record, has write down two fields that belong to different frame in the information track sub-district that causes, but has alternately played back under the still frame mode.

Therefore, Netherlands patent applications 7702874(PHN.8717) suggestion in, an identical picture number is all given in two fields of same frame, plays by a reading device of working in a new way again, and promptly it must confirm that these two have same picture and just play.Like this, those information track sub-districts that comprise two fields of different frame can not play back in the still frame mode.But also produced following situation, the picture of consecutive image number is recorded in two of an information track each other on 180 ° the radius on the record carrier, the result makes scanning move past several images or makes the operation of searching a picture number too complicated, so that these operations can not be carried out immediately, this is because Fast Activities is limited in an about radius.If two fields carry out successively and insert picture number again with two fields, three fields, three fields during each frame image at the 1st, the 3rd, the 7th and the 9th at record, perhaps insert picture number the 2nd, the 4th, the 8th and the 10th, these 10 fields equal 4 frame film images just, and said so just now problem may be resolved.

This goal of the invention provides used reading device and record carrier in that type systematic that preamble introduces and this type systematic, it can play back every circle information track image content in the still frame mode, can number also be recorded in every circle information track and all be positioned on the radius picture, so just avoided playing that those are unintelligible even distinguish the picture that misknows, saved reproduction time.

So far, the related system of this invention is characterized in, every frame film images only is recorded as two continuous fields, when reading, according to the mode of predesignating, scanning position inwardly or outwards moves to last circle information track or back one circle information track, to revolve the radial displacement of a circle identical with disk body at least for the distance that moves to another circle, no matter whenever, when playing the series of successive frames film images, all be that the frame number that the unit interval plays is n with the picture broadcast of at least two fields of the same frame image of a series of compositions, the video image number of broadcast is m.

Particularly when above-mentioned 24 frames/second cinefilm and the conversion of 30 pictures/second television standards, this invention has following characteristics: as n=24 m=30, processing mode is: in 4 frame film images cycles, by two fields in 8 fields that belong to this 4 frame image being play twice in phase weekly, so just can two groups of two field patterns that belong to different frame resemble with two groups belong to different frame three field patterns and resemble and play back.

Another characteristics are that in 4 frame film cycles, promptly 10 in its correspondence play in the field, after each the 4th and the 6th, skip two fields backward; After each the 5th, skip two fields forward.

The characteristics of another redirect are, in 4 frame film cycles, promptly play for 10 of its correspondence, after the 4th, the 6th and the 8th, skip two fields backward; After each the 5th and the 7th, skip two fields forward.

Reading device characteristics used in the system that this invention relates to are, predesignated forward and the mode of redirect backward, when playing consecutive numbers frame film images, be to play with continuous at least two two group modes that belong to same frame image, the frame number of playing with regard to guarantor unit's time equates with several n of regulation and the video image number play is m like this.

This reading device also has following characteristics, adopts method of counting during according to the redirect direction motion scan position predesignated, and it is counted the field of playing and determines the redirect mode according to count results.

Its another characteristics are, can guarantee according to the method for the redirect mode motion scan position of predesignating, 4 frame film cycles promptly 10 play, skip two fields afterwards backward for per the 4th and the 6th; After per the 5th, skip two fields forward.

In other words, these characteristics are can guarantee when according to the redirect mode motion scan position predesignated, are corresponding 10 in 4 frame film cycles and play, after per the the 4th, the 6th and the 8th, skip two fields backward; After the per the 5th and the 7th, skip two fields forward.

The characteristics of used record carrier are in the system that this invention relates to, and every frame film images only is recorded as two continuous fields.

Introduce this system in more detail with reference to the way that relevant illustration illustrates by way of example:

Fig. 1 has represented the said this system of this invention;

Fig. 2 has represented the course of work of this system;

Fig. 3 has provided the another kind of working method of system shown in Figure 2.

From as can be seen shown in Figure 1, reading device is how from optical readable record carrier (1) reading and recording of rotating, and the process of reading is achieved in that by lasing light emitter (2) launches a branch of light.Be incident upon on the record carrier by mirror surface (3) and object lens, record carrier reflexes to light beam on the detector (6) by a translucent minute surface (5).Laser beam is made up of a main beam and two side beams, detector (6) is made of three sub-detectors, like this under a tracking error signal generator (9) cooperates, just can read a signal, it can determine the position of laser beam for the last information track incidence point of record carrier (1).Use this signal, move in radial direction by parts (11) control whole optical system (10), and,, so just controlled the location of incidence point to guarantee the light beam incidence point is moved past quickly and accurately the information track of some with the inclined degree of motor (7) control mirror surface (3).About this point, 186-189 pages of Philip technology review 1973 33 the 7th phases of volume comprehensive introduction is arranged, US Patent specification 4037252 and German Offenlegungsschrift 31.21.013 also have same introduction, are incorporated herein by reference to.

The signal that is obtained by detector (6) is added to process circuit (8), in its output (17), the vision signal that can be restored.

Reading device has a redirect signal generator (13), it produces corresponding redirect control signal according to the command signal that input (20) and (21) comes, to move past a circle information track forward or backward reading the light beam incidence point, this redirect signal that output (24) is come out is by switch (14) control motor (7).Redirect signal generator (13) starting switch (14), this switch cuts off the path between tracking error generator (13) and the motor (7), so that motor (7) is subjected to the control of redirect signal generator (13), finishes until a redirect.

Trace signals generator (9) is given (7) control signals of CD-ROM drive motor by switch (14), and laser beam concentrates on next information track when guaranteeing between redirect.

Following situation is recurrent, and what the image on the film originally can usefulness, but because used standard difference is being these image transforms that vision signal has caused some problems when depositing disc-like record carrier.The standard that cinefilm uses substantially is with 24 frames/second speed record and broadcast.Be suitable for being recorded in vision signal on the video disk for this film images is converted to, every frame image all is scanned by the interlacing scan format of field.But, when using U.S.'s television standard, must play with the speed of 30 pictures/second, so just can not be converted to a television image to a frame film images, this be because record speed and broadcast fast different due to.This just need carry out adaptation processing, and concrete grammar is that it can become consecutive numbers frame film images the vision signal of a series of two or three formations with the scanner of programmed method control film images.In other words, two frame film images are transformed to 5 fields or 4 frame film images are transformed to 10 fields or 5 television images, and are so just consistent with film and television standard 24/30.Therefore, comprise under a video image (2 fields) situation at the video disk revolution that alternately record belongs to two fields and three fields of same frame film images, the circle information track that the result has has comprised two fields that belong to different frame.Under " still frame " mode, this method may produce unfavorable still frame, so suggestion Netherlands patent applications 7702874(PHN.8718), give identical picture in two fields number of same frame, when used video disk playing device only has the same frame signal in two fields of identification, just play in the still frame mode.Like this, those have comprised that two fields that belong to different frame have just no longer play into a still frame.But this brings some problems: the picture of the consecutive image of video disc recording number is positioned on two radiuses that are mutually 180 °, it is too complicated that the result makes the redirect cross several images seek the operation of a picture number in other words, so that these operations can't carry out immediately, because Fast Activities is concentrated a radius basically.The way that addresses this problem is, with two fields, three fields two each frame images of the such journal in field again, and insert picture number the the the 1st, the 3rd, the 7th and the 9th field, or insert picture number at the the the 2nd, the 4th, the 8th and the 10th, 10 of this order corresponding to 4 frame film images.

Fig. 2 and Fig. 3 have described a kind of not only being convenient to and have obtained still frame but also picture number can be inserted in a method on the radius from each circle information track, and it also has the advantage that prolongs playback duration.According to the method, playing sequence is controlled by electronic equipment, and every frame image becomes two and three fields, and the order of this 2-3-2-3 has been described among Fig. 2, and illustrated in fig. 3 is the 2-3-3-2 order.

Provided a kind of part that the record carrier of 25 helical form information tracks is arranged in Fig. 2, it comprises that the continuous film film graph of 4 frames resembles, and each frame has only two field a and b.Replace recording mode with every frame image with 2-3 and compare, its used reproduction time has prolonged 1/10 or 1/8.Because write down two fields that constitute same frame image in each information track, each information track can both be play in the still frame mode.In addition, when being each a field and the given picture in b field, all pictures number all are positioned on the radius.

Line 26 has roughly shown the normal play process, and solid line is represented to play, broken string expression redirect (in this example, having skipped an information track that is made of two fields).Detailed process is as follows: beginning to play preceding 4 field 1a, 1b, 2a and 2b, is a redirect backward then, and field 2a plays once again as a result.Be a redirect forward then, play a 3b.After this, be again a redirect backward, play a 3a then, a 4b has then been play in then another redirect forward, after this, after a redirect backward, along with this cycle that finished playing of field 4a and 4b.Marking that capable field preface that shows actual play among Fig. 2 of 27.As seen, 10 fields of this of per 4 frame films by 2-3-2-3 like this row's method play, and an a is alternately to play with a b, guaranteed correct interlacing scan like this.In the reading device of Fig. 1, the field counting of this process is finished by counter (15), process circuit (8) is responsible for extracting field system chronizing impulse, and provides a triggering signal of redirect backward in the input (20) of each the the 5th, the 7th and the 9th pulse to redirect signal generator (13); Provide a triggering signal of redirect forward in the input (21) of each the 6th and the 8th pulse to redirect signal generator (13).For the picture impulsive synchronization that guarantees that correct order particularly guarantees and the output (19) of process circuit (8) provides, each the 10th field system chronizing impulse (providing) by output (22), remove to refresh that above-mentioned counter with a reset signal, this reset signal is having 10 and picture pulses of counting to come and provide with door (16) simultaneously.In other words, realize by monitoring per the 4th picture pulse synchronously.Provide some required for this reason signals among Fig. 2, indicated the field system chronizing impulse that row representative of 28 is provided by output (18), 29 signals that expression is undertaken by input (20), the 30th, signal that expression comes from input (21).

Fig. 3 is basic identical with Fig. 2, indicates among meaning that 31,32,33,34,35 and 36 reference number represents and Fig. 2 25,26,27,28,29 and 30 corresponding one by one among Fig. 3.Different is, redirect is to carry out at the 5th and the 7th field system chronizing impulse place backward, and redirect is at the 6th field system chronizing impulse forward, has so just produced the broadcast ordering of 2-3-3-2.

The method of the adaptation processing of electronic standard described here also can be used for other occasion, especially for the situation of prolong reproduction time. For example, when manufacturing the animated film sheet, draw the frame numbers of system in order to reduce the per second actual needs, can use the method for Reusability picture. In this case, the picture frame that only needs record to differ from one another, and when playing, repeat to broadcast by electronic control method, Therefore as long as redirect is to reach the purpose that repeats to broadcast backward, this may be similar with the adaptation processing of top said 24/ second-30/ second standard. Even can also record film images by various criterion, and identify each frame image according to picture number or at the index that video disk begins to locate to provide again, again playing device is carried out programmed process, stipulate out the various different frame orders of playing. Counter among Fig. 1 (15) is exactly programmable. For example, an available microprocessor is as this counter. Since in the use literary composition introduce player method the time, repeat in some to broadcast, so the record of sound and play and can not handle by conventional method. Compression-expansion or multipath conversion technology can address this problem. For example, each stereo channel can use two FM sound-carriers, and the waveform of a carrier is used for a certain provides sound when broadcasting for the first time, and another is used for providing when this repeats to broadcast sound, and this order should be consistent with Fig. 2, Fig. 3 playing sequence.

Said method can also use once forward redirect or the way of redirect backward, but invent in the said system at this, can also adopt following method to carry out record: to be the correct record content of playing, need a few circle information tracks of a redirect, particularly when a plurality of images are recorded in same information track simultaneously, need to skip some circle channels.

In addition, this invention is not limited only to use in the optics video disk, also can be used for the record carrier that other recording method produces.

Claims (10)

1, a kind of system that is used for playing the continuous mute of record on disc-shaped carrier, the device that comprises scanning record carrier, the channel that spirality or annular concentric are arranged on the record carrier, programme content is with the formation of vision signal, record in proper order in the channel the inside by the mode of two of every circle channels, want to play and need inswept several mutes of unit interval with original picture speed, and the general broadcasting speed of record carrier is two videos of forming of unit interval m (m＞n), read-out device then must have substantially along carrier radially, at least to be equivalent to the radial displacement of a circle, the device that the scanning element of carrier is moved forward and backward; Be characterized in that for two of the every frame mute recording occurring continuouslys that writes down, when reading, scanning element moves forward and backward according to the last circle or back one circle of predetermined form to a channel.This moves on to the Na Yiquan that the footpath makes progress actually, depends on the result who reaches such: produce one group at least by pairing two the continuous mute of same mute, the mute number that the unit interval plays is the n of regulation at every turn, and the video number that produce is m.

2, claim 1 described system is characterised in that n=24, m=30, and above-mentioned record format is: for each cycle of being made up of four width of cloth mutes, play two groups of Liang Chang and two groups of three fields that belong to different mutes that belong to different mutes, the result is playing the two group of eight script holder's record that belongs to above-mentioned four mutes weekly.

3, claim 1 described system is characterised in that: for the above-mentioned cycle of being made up of four mutes, correspondingly play 10 fields, whenever the 4th and the 6th end, jump two backward, whenever the 5th end, to two of skip befores.

4, in claim 2 described systems, it is characterized in that: for the above-mentioned cycle of forming by four mutes, correspondingly play 10 fields, whenever the 4th, six, eight end, jump two backward, whenever the 5th, seven end, to two of skip befores.

5, the reading device in the described system of above-mentioned arbitrary claim, have substantially radially along carrier, at least to be equivalent to the radial displacement of a circle, the device that the scanning element of carrier is moved forward and backward, form according to producing a predetermined front and back redirect produces continuous mute, and it is one group of continuous mute of being made up of two fields that belong to same mute at least, the mute number of playing in unit interval is several n of regulation like this, and the video number of playing is m.

6, claim 5 described device characteristics are: a device that scanning element is moved by predetermined way is arranged, and it generates the counting device composition as the above-mentioned form of the function of counting simultaneously by the field counting to playing.

7, claim 5 or 6 described device characteristics are: the device by predetermined way motion scan point designs by following mode: in the above-mentioned cycle of being made up of four mutes, 10 fields of corresponding broadcast, whenever the 4th and the 6th end, jump two backward, whenever the 5th end, to two of skip befores.

8, the feature of claim 5 or 6 described devices is: the device by predetermined way motion scan point designs by following mode: in the above-mentioned cycle of being made up of four mutes, 10 fields of corresponding broadcast, whenever the 4th, six, eight end, jump two backward, whenever the 5th, seven end, to two of skip befores.

9, in claim 1 to 4 described arbitrary system above the used record carrier, has spiral helicine channel, continuous mute program, mode with two on every circle is recorded in the channel with the form of vision signal continuously, requiring has n mute to play by original broadcasting speed in the unit interval, and the normal playback speed of record carrier is by m two videos of forming, m＞n in the unit interval, as a result, only write down two fields continuously for each mute.

10,, have two sound channels, a playback when playing this first time, playback when another was play in this second time at least by the field of above-mentioned form repeat playing by 1 to 4 the described system of arbitrary claim.

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