CN1091335C - Video frequency signal processing device - Google Patents

Abstract

The video signal processing apparatus of the invention includes a representative component extractor which receives a video signal including a signal representing representative components and a signal representing non-representative components, thereby extracting the signal representing the representative components from the video signal.

Description

Apparatus for processing of video signals

1, invention field

The present invention relates to a kind of apparatus for processing of video signals, in order to the vision signal of being supplied with is shown, writes down, transmits or edits.

2, the explanation of relevant technologies

In order to write down or transmit a vision signal effectively, the high efficiency coding techniques of vision signal plays an important role usually.On the other hand, in order to discern the video signal content of high efficiency coding, generally to utilize method to needing video signal displayed to decipher.

In recent years, require content more and more with higher speed recognition coding vision signal (particularly being recorded in the vision signal on the tape).

Identification has been recorded in the encoded video signal content on the tape, and a kind of exemplary method is a high-speed replay.High-speed replay is a kind of like this method, and promptly the tape speed of travel is set to such an extent that compare the very fast video data that covers many frames when decoding, is regarded as a frame.This method has during for example Japanese kokai publication hei 4-86183 patent is announced illustrated at a text.

Another kind of simpler and with the exemplary method of more speed recognition coding video signal content, be only to extract representative vision signal to be shown.A kind of method that in Japanese kokai publication hei 7-123355 patent is announced, discloses for example, the data that wherein not only common replay operations is used are recorded, and by each block being carried out the resulting DC component of discrete cosine transform (DCT), data as high-speed replay operation usefulness, also be recorded respectively, enlarge, filtering also shows.

Announce the content that is disclosed according to Japanese kokai publication hei 4-86183 patent, the content that is write down can be discerned under high speed really, and still, the data of high-speed replay operation usefulness need decoding.In addition, because resulting vision signal covers many frames when carrying out high-speed replay, this vision signal can not be that unit edits with a frame.

On the other hand, announce the content that is disclosed according to Japanese kokai publication hei 7-123355 patent, the data of the usefulness of not only resetting usually will be preserved, and the DC component of each piece also will be preserved the data as the simple and easy playback usefulness of high speed respectively, like this, the data of same content will write down twice, and require extra posting field, so that preserve DC component.

Secondly, in the occasion that transmits vision signal, if be included in an image in any frame of moving image, form with indivedual pictorial data transmits, so, transmitting total data in real time seldom is necessary also, so, this pictorial data is promptly used the so not big transmission line of transmission capacity (for example telephone wire), also can transmit fully.But in the occasion that transmits a moving image, even moving image is encoded through high efficiency, available transmission line kind also is very limited, requires high-speed line that use with satellite communication or similar.

Furtherly,, carry out the edit operation of tape to tape with Video/tape/recorder (VTR) as the method for edited video signal, normally very universal.And, for the applicability of VTR of the high price that improves broadcasting usefulness, frequently use the off-line edit method, promptly material once is replicated on the cheap tape, produces a work tape; In the enterprising edlin manoeuvre of work tape; Then, conclusive edit operation is undertaken by the final catalogue of determining.To Vidio tap edit (linear editing) operation, shearing and modification for institute's content edited is satisfied with require a great deal of time at tape.Computer technology and disk technology have had alarming development in recent years fortunately, various editing devices are suggested, some of them have dropped into actual use, in these devices, the material that is recorded on the tape once deposits hard disk in, and at the enterprising edlin of the hard disk with fabulous accessibility (non-linear editing).Yet the recording capacity of hard disk is generally much smaller than the capacity of being with the shape medium, and the unit cost of this hard disk medium is higher.Therefore, the someone proposes, and utilizes magnetic tape system superior on recording capacity and medium cost and have the disk system of premium properties on accessibility, in conjunction with forming a kind of mixed type editing device.

For example, in Japanese kokai publication hei 5-101609 patent is announced, disclosed complementary technology, with single management, relatively poor and the less deficiency of disk system capacity of compensation magnetic tape system accessibility, in this management, by a part (in general, from beginning to end of each scene, vision signal is corresponding to time a few minutes) that is recorded in each scene on the tape is recorded on the disk, with the address of the vision signal on the tape and the address of the vision signal on the disk, incorporate into mutually, in addition, in Japanese kokai publication hei 5-101609 patent is announced, disclosed a kind of edit methods, this method is utilized some known video compression technologies, with video signal recording on disk, operate to produce decision catalogue by non-linear off-line edit, finish the decisive edit operation of tape then to tape.

But common mixed type editing device is the VTR that hypothesis is used an analog record mode in principle, or a non-compression-type numeral VTR, as VTR wherein.In recent years, the marked improvement of video compression technology has realized providing the VTR of vision signal of the allowed quality of broadcasting usefulness.In addition, the compression-type numeral VTR that wherein contains these video compression technologies also is suggested.

Because general mixed type editing device requires two video compressor/expanders, that is to say, a video compressor/expander is used for video signal recording to disk, a video compressor/expander belongs to compression-type numeral VTR, the cost of this device just uprises unfriendly, and the size of its hardware also increases unfriendly.For example, it is impossible satisfying two requirements simultaneously with a video compressor/expander device.But although the existing development of video compression technology, for the vision signal of the allowed quality of broadcasting usefulness is provided, requiring data transfer rate is tens times of Mbps at least.So, except a part of material deposits the method for disk in,, realize that available video compressor/expander is difficult usually from the magnetic disc storage capacity.

According to the present invention, provide a kind of apparatus for processing of video signals.This apparatus for processing of video signals comprises: represent the composition extractor for one, it receives and comprises the vision signal that expression is represented the signal of composition and represented the signal of non-representative composition, extracts the signal that composition is represented in expression thus from vision signal.

In one embodiment, apparatus for processing of video signals further comprises a register, is used for the representative composition is recorded recording medium.

In another embodiment, apparatus for processing of video signals further comprises a display unit, is used for showing the representative composition thereon.

In yet another embodiment, represent the composition extractor to comprise: a mark determinant, be used to detect the contiguous mark of representing composition, represent composition to be included in the middle of the data flow of expression vision signal; And a switch, be used for response flag and detect output stream.

In yet another embodiment, apparatus for processing of video signals further comprises a transmitter, is used for representing the signal of composition to export transmission line to expression.

In yet another embodiment, apparatus for processing of video signals further comprises: a register is used for recording on the recording medium representing to represent the signal of composition; And a selector, being used for from being recorded on the recording medium and the signal of composition is represented in expression, selection will output to transmission line and remove to transmit frame.

In yet another embodiment, apparatus for processing of video signals further comprises: a magnetic tape reproducing device, be used for the playback of video signal, and this vision signal comprises expression and represents the signal of composition and the signal of the non-representative composition of expression, and has been recorded on the tape; A tape is carried motor, is used to carry tape; And a tape delivery controller, be used to control the speed of service of tape.

In yet another embodiment, apparatus for processing of video signals further comprises: a decoder, be used for the received code vision signal, and to encoded video signal decoding, and export the vision signal of having deciphered; And encoder, be used to receive the vision signal of having deciphered, and make the vision signal of having deciphered do discrete cosine transform, resetting thus comprises the vision signal that expression represent the signal of composition and represented the signal of non-representative composition, and this vision signal outputed to represents the composition extractor.

In yet another embodiment, apparatus for processing of video signals further comprises a compressor reducer, is used for the signal that compression expression is represented composition.

In yet another embodiment, apparatus for processing of video signals further comprises a transmitter, is used for exporting the signal from compressor reducer output to transmission line.

According to a further aspect in the invention, a kind of apparatus for processing of video signals is provided.This apparatus for processing of video signals comprises: a magnetic tape reproducing device, be used for resetting and outputting video signal, and this vision signal comprises expression and represents the signal of composition and the signal of the non-representative composition of expression, and has been recorded on the tape; Represent the composition extractor for one, be used for receiving video signals, and from vision signal, extract the signal that composition is represented in expression; A magnetic disk recorder is used for representing the signal record of composition at the magnetic disc storage medium expression; A disk reproducer is used for representing to represent from the magnetic disc storage media-playback signal of composition; And a coding region setting apparatus, be used to control the replay operations of magnetic tape reproducing device.

In one embodiment, apparatus for processing of video signals further comprises a magnetic tape recorder, is used to write down the vision signal by the output of magnetic tape reproducing device.

According to another aspect of the invention, a kind of apparatus for processing of video signals is provided.This apparatus for processing of video signals comprises: a frame signal extractor, and be used to receive and comprise the vision signal of signal that the signal and the non-representative composition of expression of composition represents in expression, the signal of at least one frame is represented in output thus; Represent the composition extractor for one, be used for receiving video signals, and from vision signal, extract the signal that composition is represented in expression; And a selector, be used to receive, and, export in these signals selectively according to the control signal that the outside is imported from the signal output of frame signal extractor with from the signal output of representing the composition extractor.

According to another aspect of the invention, a kind of apparatus for processing of video signals is provided.This apparatus for processing of video signals comprises: a non-representative composition is augmented device, is used to receive the signal that composition is represented in expression, augments the signal of the non-representative composition of expression whereby; A frame signal processor is used for the signal that a frame is represented in receiving video signals and output at least; And a selector, be used to receive from non-representative composition and augment the signal output of device and, and, export in these signals selectively according to the control signal of outside input from the signal output of frame signal processor.

Therefore, invention described here, making provides a kind of advantage of apparatus for processing of video signals to become possibility, and this device can be discerned the content of the vision signal of supplying with at a high speed; Reduce recording capacity; And by carry out to show, representative composition in the vision signal that the signal that has been divided into expression representative or the signal that divides and has represented non-representative composition is only extracted in record or transmission simultaneously, the speed that allows with reality sends a vision signal through transmission line, even the transmission capacity of transmission line is less relatively.

As seen these and other advantages of the present invention concerning the people who is familiar with this technology, after reading and understanding the detailed description of being done with reference to the accompanying drawings, will become obviously.

Accompanying drawing mainly illustrates

Fig. 1 is the calcspar of the apparatus for processing of video signals among the 1st embodiment of the present invention.

Fig. 2 is a calcspar of representing composition extractor 14.

Fig. 3 is the format chart that the incoming video signal data flow represented in summary.

Fig. 4 is the calcspar of the apparatus for processing of video signals among the 2nd embodiment of the present invention.

Fig. 5 is the demonstrative structure figure of a frame of expression TSC-system formula digital video signal.

Vision signal piece and record format represented in Fig. 6 summary.

Fig. 7 is the graph of a relation of explanation between the pixel, promptly to representing composition and non-representative composition to decipher pixel in the resulting common playback picture, and is presented at relation between the pixel in the simple and easy display frame on the demonstration lead-out terminal of the present invention.

Fig. 8 is the calcspar of the apparatus for processing of video signals among the 3rd embodiment of the present invention.

Fig. 9 is the calcspar of the apparatus for processing of video signals among the 4th embodiment of the present invention.

Figure 10 is the calcspar of the apparatus for processing of video signals among the 5th embodiment of the present invention.

Figure 11 is the calcspar of the apparatus for processing of video signals among the 6th embodiment of the present invention.

Figure 12 is the track part of comparatively representing on the tape, the common track at playback head center under the playback speed, and the trajectory diagram at playback head center under the high-speed replay speed.

Figure 13 is the calcspar of the apparatus for processing of video signals among the 7th embodiment of the present invention.

Figure 14 is the calcspar of the apparatus for processing of video signals among the 8th embodiment of the present invention.

Figure 15 is the calcspar of the apparatus for processing of video signals among the 9th embodiment of the present invention.

Figure 16 is the calcspar at the apparatus for processing of video signals that transmits side among the 10th embodiment of the present invention.

Figure 17 is the calcspar at the apparatus for processing of video signals of receiver side among the 10th embodiment of the present invention.

Figure 18 is the calcspar of the apparatus for processing of video signals among the 11st embodiment of the present invention.

Figure 19 is the calcspar of the apparatus for processing of video signals among the 12nd embodiment of the present invention.

Figure 20 is the key diagram of the 12nd embodiment of the present invention.

Figure 21 is the key diagram of the 12nd embodiment of the present invention.

Figure 22 is the key diagram of the distortion of the 10th embodiment of the present invention.

Figure 23 is the format chart of the compressed vision signal among the 10th embodiment of expression.

Figure 24 is the calcspar of the apparatus for processing of video signals among the 13rd embodiment of the present invention.

Figure 25 is the calcspar of the apparatus for processing of video signals among the 14th embodiment of the present invention.

Figure 26 is that expression is resulting by making 8 * 8 pixel squares make DCT, the figure of 8 * 8 squares that are made of the DCT coefficient.

The preferred embodiment explanation

Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings, in all embodiment, identical part is marked with identical reference number on the figure.Embodiment 1

Fig. 1 is the calcspar of the apparatus for processing of video signals among the 1st embodiment of the present invention.In Fig. 1, what reference number 11 was represented is medium, wherein the encoded vision signal of record; 12 the expression be communication terminal; The 13rd, buffer; The 14th, represent the composition extractor; The 15th, video camera; The 16th, computer; The 17th, encoder; The 18th, recording medium; The 19th, show lead-out terminal.CD-ROM, tape, hard disk, CD or similar medium can be used as medium.Medium 11, communication terminal 12 and encoder 17 will be called encoded video signal supply unit 20 blanketly.

Below, with the operation among the 1st embodiment of explanation.

Be separated into the encoded video signal of representing composition and representing composition non-representative composition in addition, supplied with, be kept at then in the buffer 13 by medium 11 or communication terminal 12.Here " representative composition " means direct current (DC) composition, is that image is a unit with 8 * 8 pixel squares, obtain through discrete cosine transform (DCT), and " non-representative composition " means non-DC composition or interchange (AC) composition.

Being kept at the data in the buffer 13, is that unit is fed into and represents composition extractor 14 with the frame.On the other hand, vision signal by the image file in video camera 15 or the computer 16 (for example bitmap file) record, encoded by encoder 17, be separated into and represent composition and represent composition non-representative composition in addition, be fed into then and represent composition extractor 14.Represent composition extractor 14, from the vision signal of this form, only extract and represent composition.The representative composition that is extracted is recorded on the recording medium 18, and the representative composition that is recorded is shown lead-out terminal 19 and is transformed to image, shows then.

Fig. 2 is a calcspar of representing composition extractor 14.In Fig. 2, what reference number 21 was represented is input terminal; The 22nd, the mark determinant; The 23rd, counter; The 24th, switch, the 25th, lead-out terminal.For this operation is described, suppose vision signal with form supply shown in Figure 3, wherein, after front end was placed front end data, it was the non-representative composition of " b " bit that order is placed representative composition and the regular length that regular length is " a " bit.But even these compositions do not have fixing length, vision signal also is not limited to form shown in Figure 3, as long as can detect the representative composition with any method.

Fig. 3 is the format chart that the data flow of incoming video signal represented in summary.In Fig. 3, " F ", " DC " and " AC " be expressive notation respectively, represents composition and non-representative composition.When form vision signal as shown in Figure 3 is imported into mark determinant 22 through input terminal 21, if front end data (being mark) is supplied with by mark determinant 22, so, one zero clear signal is sent to counter 23, so, the value " C " of counter 23 is re-set as " 0 ".On the other hand, if front end data is not detected, so, the value of counter 23 " C " will add " 1 ".If c≤a, because input is made up of the binary number of representing composition, counter 23 is supplied with an ON signal to switch 24, and switch 24 supplies to lead-out terminal 25 successively with binary load.On the other hand, if a＜c≤a+b, because input is made up of the binary number of non-representative composition, counter 23 is supplied with an OFF signal to switch 24, and switch 24 is not supplied with binary load to lead-out terminal 25.

When the value " c " of counter 23 reached " a+b ", the binary number of Gong Geiing was to represent composition next time.Therefore, before binary number was supplied with next time, the value of counter 23 " C " was reset to " 0 ".After this, carry out in the mode identical with aforesaid operations, on behalf of composition, the next one be supplied to lead-out terminal 25.

As mentioned above, among the 1st embodiment of the present invention, be separated into the vision signal of representing composition and representing composition non-representative composition in addition when, when being supplied with by the arbitrary branch from each branch of encoded video signal supply unit 20, vision signal to this form, might be from wherein, only extract and show or write down and represent composition.

In this embodiment, be recorded in the representative composition on the recording medium 18, be output and show.Another kind method is to represent composition directly to export and demonstration from representing composition extractor 14.In addition, demonstration lead-out terminal 19 can be cancelled from structure shown in Figure 1.

In addition, various types of monitors can be used as and show lead-out terminal 19.That is to say that the monitor of the not only monitor of Chang Yong interlace mode, and non-interlace mode comprises VGA card (for example go into computer monitor), projector and similar devices can use.

Have, buffer 13 can be a volatile storage media not again, and for example hard disk can be a volatile storage media also, as RAM.

Have again, when the threshold value of counter 23 as in this embodiment, be set to " a " or lower, represent composition directly to be extracted.But if being recorded as when transmitting vision signal, require further to reduce capacity, threshold value can be set to " a " or lower.Embodiment 2

Fig. 4 is the calcspar of the apparatus for processing of video signals among the 2nd embodiment of the present invention.In the following embodiments, unless some special restriction, normal supposition: in encoded video signal supply unit 20, usefulness be tape; The DC composition is as representing composition, and it is to be obtained through discrete cosine transform (DCT) by each square that vision signal is divided into, and each square is made up of the vertical pixel in 8 horizontal pixels * 8; And the DC composition in each square is recorded in the fixed area of tape.But,, also can realize same effect certainly with any other encoded video signal supply unit.

In Fig. 4, what reference number 41 was represented is tape; 42 the expression be the magnetic tape reproducing device.

Hereinafter, with the operation among the 2nd embodiment of explanation.

Be recorded in the data on the tape 41, read by magnetic tape reproducing device 42; Be kept at then in the buffer 13, until be read out corresponding to the data of a frame.Be kept at the data in the buffer 13, have only the DC composition to be represented composition extractor 14 to extract, be recorded in then on the recording medium 18, the DC composition that is recorded is shown lead-out terminal 19 and is transformed to image, is shown then.

Fig. 5 is the demonstrative structure figure of a frame of the digital video signal of expression TSC-system formula.Luminance signal (Y) is made up of the vertical pixel in 720 horizontal pixels * 480, and first color difference signal (Cr) is made up of the vertical pixel in 180 horizontal pixels * 480 with second color difference signal (Cb).

Below with an exemplary method of these signals of declare record.At first, each luminance signal and each color difference signal are split into many squares, and each square is made up of the vertical pixel in 8 horizontal pixels * 8.Fig. 6 roughly represents the record format of these squares and vision signal.Luminance signal, in the horizontal direction the ratio of number of pixels between first color difference signal and second color difference signal is 4: 1: 1.Therefore, shown in (a) portion of Fig. 6, be in 4 Y squares of the same area of screen, 1 Cr square and a Cb square constitute a macroblock.Secondly, each square is carried out discrete cosine transform (DCT).By the resulting coefficient of DCT, be separated into DC composition and AC composition.In these compositions, the AC composition is cut apart with suitable quantized level, to obtain variable length code.

(b) portion of Fig. 6 represents the exemplary posting field on the recording medium, wherein, has write down and a corresponding video data of macroblock.Y0 to Y4, Cr and Cb form a corresponding macroblock of macroblock in (a) portion with Fig. 6.This posting field has fixing length.In this zone, the data corresponding to a byte (8) are recorded in vertical direction, thereby make highest significant position (MSB) be placed on the most significant end of this figure, and the byte location order is arranged in the horizontal direction.Coded data is at first at the vertical direction record, until least significant bit (LSB), presses the growth order record of byte location number from MSB then in the horizontal direction.On each square of this posting field, the AC composition of DC composition and variable length code is recorded in DC district and AC district with regular length respectively.

In the 2nd embodiment, coded data is pressed above-mentioned record order, is fed into from buffer 13 and represents composition extractor 14.Therefore, represent composition extractor 14, as long as the method for operation to illustrate in the 1st embodiment, the item counting by bit stream just can extract the DC composition from incoming bit stream.

Fig. 7 is the graph of a relation between the explanation pixel, promptly by to represent composition (or DC composition) and non-representative composition (or AC composition) to decipher pixel in the resulting common playback picture, and the relation between the pixel in the shown easy display frame of the demonstration lead-out terminal among the 2nd embodiment 19.When a square is made up of 8 * 8 pixels, a pixel in the corresponding easy playback picture of one 8 * 8 square in the common playback picture.So when the size of a common playback picture showed as 720 * 480 pixels, the size of an easy playback picture showed as 90 * 60 pixels.

As mentioned above, in the 2nd embodiment of the present invention, the picture of resetting easily has the size littler than common playback picture, can only extract DC by the fixed area from tape and become to assign to form.In addition, it can be less can representing the size of the circuit of composition extractor.

Should be noted that the size of an easy playback picture, be not limited to 90 * 60 pixels.As required, size can increase or reduce.In addition, even in easy playback picture, cause that various visions are disturbed for example to beat, this vision is disturbed and can be eliminated by utilizing for example suitable filter.

The size (or recording capacity) that shall also be noted that posting field is not subjected to concrete restriction, as long as the DC district and the AC district of each square have fixing length.Embodiment 3

Fig. 8 is the calcspar of the apparatus for processing of video signals among the 3rd embodiment of the present invention.In Fig. 8, what reference number 81 was represented is transmitter; The 82nd, external transmission lines; The 83rd, receiver.

Hereinafter, with the operation of explanation in the 3rd embodiment, mainly be about with the 2nd embodiment in the operation difference.

By the DC composition of representing composition extractor 14 to extract, encode by transmitter 81, grouping, and the like the operation of being convenient to transmit, send through external transmission lines 82 then.The data that the are sent out receiver 83 of restoring, so as on recording medium 18 record.

As mentioned above, in the 3rd embodiment of the present invention, by only the DC composition that is extracted being encoded and making it by transmission line, the amount of information that is transmitted can reduce, and does not damage the content of vision signal.Embodiment 4

Fig. 9 is the calcspar of the apparatus for processing of video signals among the 4th embodiment of the present invention.In Fig. 9, what reference number 91 was represented is the recording medium controller; The 92nd, recording medium; The 93rd, the display frame selector; The 94th, the demonstration of a plurality of images and lead-out terminal.

Hereinafter, with the operation of explanation in the 4th embodiment, mainly be about with the 2nd embodiment in the operation difference.

According to the input from the user, display frame selector 93 produces data, indicates the frame that needs output, then, data is outputed to recording medium controller 91.Recording medium controller 91 controlling recording medium 92 make data corresponding to the representative composition (or DC composition) of the frame that is specified, from wherein selecting and fetching.Random-access memory (ram), hard disk drive (HDD), CD, tape or similar medium can be used as recording medium 92.Corresponding to the data of the representative composition of the frame that indicates by display frame selector 93, from recording medium 92 outputs,, arrive terminal 94, in order to show and to export a plurality of images through recording medium controller 91.For example, be used to show and export the terminal 94 of a plurality of images, export a signal, can on a screen, show the corresponding easy playback picture of a plurality of and selected frame simultaneously.

As mentioned above, in the 4th embodiment of the present invention, by showing a plurality of easy playback pictures simultaneously on a screen, in-edit or characteristic image, the particularly image of scene change for example can be easily searched.As illustrated in the 2nd embodiment, because easy playback picture, is 1/8th of a common playback picture in level with size on the vertical both direction, unless amplify or dwindle, the corresponding maximum frame number of easy playback picture that can show on a screen simultaneously becomes 64.In addition, if use the high-resolution monitor with about 1280 * 1024 pixels, the more easy playback picture of more number can be shown simultaneously.

In the 4th embodiment, this situation has been described, promptly the DC composition is by representing composition extractor 14 directly to supply to recording medium 92.But should be noted in the discussion above that and also can use the structure that sends the DC composition by external transmission lines, as doing among the 3rd embodiment.Embodiment 5

Figure 10 is the calcspar of the apparatus for processing of video signals among the 5th embodiment of the present invention.In Figure 10, what reference number 101 was represented is the 1st recording medium controller; 102 is the 1st recording medium; The 103rd, the transmission frame selector; 104 is the 2nd recording medium.

Hereinafter, with the operation among the 5th embodiment of explanation, mainly be about with the 3rd embodiment in the difference of operation.

DC composition by representing composition extractor 14 to extract by the 1st recording medium controller 101, is stored in the 1st recording medium 102.The action of transmission frame selector 103 makes the user need can select the frame of transmission arbitrarily from the data being kept at the 1st recording medium 102.The DC composition of the frame of being selected by transmission frame selector 103 is sent out device 81 codings so that transmission is sent out away through external transmission lines 82 then.The DC compositional data that receiver 83 receives temporarily is kept in the 2nd recording medium, then by showing that output 19 shows.

As mentioned above, in the 5th embodiment of the present invention, by any selection or delete frame to be sent, need the information transmitted amount greatly to reduce, so, even by the low transmission line of transmission rate (for example telephone wire), also can transmission of video and do not damage the content of video.

It should be noted that in this embodiment, also can use such structure, promptly select the DC composition that has been transmitted after the transmission frames in advance, in further selected record or demonstration of receiver side at transmission frame selector 103.Embodiment 6

Figure 11 is the calcspar of the apparatus for processing of video signals of the 6th embodiment of the present invention.In Figure 11, what reference number 111 was represented is the magnetic tape transport motor; The 112nd, the magnetic tape transport controller.

Hereinafter, will the explanation the 6th embodiment operation, mainly be about with the 2nd embodiment in the operation difference.

Magnetic tape transport motor 111, according to the control signal of supplying with by magnetic tape transport controller 112, the speed of travel of control tape 41.

Will be noted that the example of high-speed replay operation, in this operation, the speed of travel of tape 41 is higher than the common playback speed of travel, the operation that illustrated mainly is about playback head.

Figure 12 is the track part 121 that comparatively is illustrated on the tape, the track 123 at playback head center under the track 122 at playback head center and the high-speed replay speed under the common playback speed.In Figure 12, the width of " W " indication magnetic head.When carrying out replay operations under common speed, therefore every track part of playback head scanning reads whole macroblocks.On the other hand, when carrying out the high-speed replay operation, playback head scans at every turn, from many track parts (part of shadow representation Figure 12) while sense data.Identical with the method for the 2nd embodiment, have only the DC composition to be extracted in each macroblock of at this time reading.The DC composition that is extracted is recorded on the recording medium 18, then by showing lead-out terminal 19 outputs.Here, " at a high speed " to mean speed faster than common playback speed.

As mentioned above, in the 6th embodiment of the present invention, when tape is walked with the speed faster than common playback speed, from the video data of reading, extract the DC composition, thus might be under higher speed, and be recorded under the situation of video signal information amount the vision signal that is recorded being become reduce on the unrecognizable degree, be identified in the content of the vision signal that has been recorded in the long time cycle.

In addition, in the 6th embodiment, the output of buffer 13 can be imported into transmitter 81.In this case, in order to obtain representative composition, only need provide another to represent composition extractor 14 at receiver side through the vision signal of external transmission lines 82 transmission.Embodiment 7

Figure 13 is the calcspar of the apparatus for processing of video signals of the 7th embodiment of the present invention.In Figure 13, what reference number 131 was represented is the adaptive decoding device; The 7th operation among the embodiment hereinafter will be described.

The difference of the 7th embodiment and the 1st embodiment is: to the video data of medium 11 or the video data that receives through communication terminal 12, can encode with arbitrary format.Coded data supplies to the adaptive decoding device arbitrarily,, according to corresponding form coded data is deciphered there.That is to say that " self adaptation " decoder uses a kind of and corresponding interpretation method of incoming video signal coding method, and incoming video signal is deciphered.

Decoded data are separated into by encoder 16 and represent composition and non-representative composition, so that further coding.The implementation method of coding is for example to carry out compressing in the frame with discrete cosine transform.

Coded data only once is kept in the buffer 13, is sent to then and represents composition extractor 14, therefrom extracts and represents vision signal.The representative vision signal that is extracted is recorded on the recording medium 18, by showing that lead-out terminal 19 shows, perhaps is sent out the coding that device 81 works are suitable for transmitting then, so that by external transmission lines 82 transmission.Perhaps use another kind of method, vision signal is recorded on the recording medium 18.Simultaneously by external transmission lines 82 transmission.

As mentioned above, in the 7th embodiment of the present invention, by from vision signal with the arbitrary format coding, recover to represent composition, show then, write down or send these and represent composition, with the vision signal of arbitrary format coding, can easily be shown, and the amount of information that is recorded or sends can reduce.Embodiment 8

Figure 14 is the calcspar of the apparatus for processing of video signals among the 8th embodiment of the present invention.In Figure 14, what reference number 141 was represented is magnetic disk recorder; The 142nd, disk; The 143rd, the disk reproducer; The 144th, the editing area setting apparatus; 145 playback programs setting apparatus.

Be separated into the vision signal of DC composition and AC composition,, from the data that are recorded in tape 41, reset out by magnetic tape reproducing device 42.Represent composition extractor 14, the vision signal of coming out, extract the DC composition from resetting by magnetic tape reproducing device 42.The DC composition that is extracted by magnetic disk recorder 141, is recorded on the disk 142.At this moment, generally the time code that has been recorded on the tape 41 is recorded on the disk 142 simultaneously, is recorded in the DC composition on the disk 142, can reset by disk reproducer 143, easy playback image is presented at shows on the lead-out terminal 19.

Secondly, make editing area setting apparatus 144 operation disk reproducers 143, (at this moment, physical record is on disk 142 by being recorded in vision signal on the disk 142, be the DC composition that is recorded in the vision signal on the tape 41), produce and the necessary corresponding time code table of tangent plane.More particularly, by sign dish or the similarity piece above the rotation editing area setting apparatus 144, make disk reproducer 143 carry out various operations, as F.F., recoil and the variable-ratio replay operations, the tangent plane that search is necessary monitors by DC to become to be grouped into simultaneously, and is presented at the image that shows on the lead-out terminal 19.Then, order is write down the time code starting point and the end of a period point of the society of the necessity that is found.In this case, the end setting of point of time code starting point and time code will be enough to contain each necessary tangent plane, and can change in-edit neatly during the edit operation of making decision property after making.Just, control signal of editing area setting apparatus 144 outputs is utilized and is represented composition to carry out rough edit operation to magnetic tape reproducing device 42.This rough edit operation, meaning editor is to carry out roughly on some second-times.A time code or similar signal are exported as control signal from editing area setting apparatus 144.According to these time codes, magnetic tape reproducing device 42 carries out drive controlling, comprises the recoil and the F.F. of tape.

Secondly, produce,, be sent to magnetic tape reproducing device 42 with the corresponding time code table of the tangent plane of necessity by editing area setting apparatus 144.Magnetic tape reproducing device 42 is reset once more and is become to be grouped into and be recorded in the vision signal in tape 41 a certain zones by DC composition and AC, so that the time code table that indicates with editing area setting apparatus 144 is corresponding.At this moment, the DC composition and the AC composition of the vision signal of being reset by magnetic tape reproducing device 42 by magnetic disk recorder 141, are recorded on the disk 142.

On disk 142, during recorded video signal,, be recorded so only be necessary the AC composition of part because the DC composition has been recorded in the there.

Here, be recorded in the vision signal on the disk 142, reset by disk reproducer 143, then, processing such as the inverse DCT playback and require through, so that before DCT, vision signal is resumed and is high-quality image, and image can be displayed on and show on the lead-out terminal 19.

Secondly, be recorded in the vision signal material on the tape 41, carried out the final decision edit operation by playback programs setting apparatus 145.That is to say, when the high quality image that shows from vision signal (at this moment DC composition and AC composition are recorded), set the moment in-edit, described vision signal has been recorded on the disk 142, and corresponding with the tangent plane of editing area setting apparatus 144 selected necessity.In other words, playback programs setting apparatus 145 is the meticulous edit operation of unit to control signal of disk reproducer 143 outputs so that carry out with the frame.In addition, with regard to suitable tangent plane, can specify special effects playback or set the playback order of one group of tangent plane.According to the playback programs that produces by this way, disk reproducer 143 is the vision signal of playback of recorded on disk 142 finally.The vision signal that these are reset can perhaps be recorded on recording medium such as the tape once more aloft as the vision signal of broadcasting usefulness.Embodiment 9

Figure 15 is the calcspar of the apparatus for processing of video signals of the 9th embodiment of the present invention.In Figure 15, what reference number 151 was represented is content of edit dial gauge generator; The 152nd, magnetic tape recorder; 153 tapes.

The 9th embodiment of the present invention hereinafter will be described with reference to the accompanying drawings.

At first, magnetic tape reproducing device 42 playback of video signals, this vision signal has been separated into DC composition and AC composition, from tape 41.Represent composition extractor 14, by extracting the DC composition in the vision signal of magnetic tape reproducing device 42 playbacks.The DC composition that is extracted is recorded on the disk 142 by magnetic disk recorder 141.At this moment, generally be recorded in the time code on the tape 41, be recorded in simultaneously on the disk 142.Be recorded in the DC composition on the disk 142, can be reset, the simple and easy playback image that only is grouped into by DC is displayed on shows on the lead-out terminal 19 by disk reproducer 143.

Secondly, by making content of edit dial gauge generator 151 operation disk reproducers 143, from be recorded on the disk 142 vision signal (at this moment, physical record is the DC composition that is recorded in the vision signal on the tape 41 previously on disk 142) in, produce one with the necessary corresponding time code table of tangent plane.More particularly, by sign dish or the similarity piece above the rotation content of edit dial gauge generator 151, make disk reproducer 143 carry out various operations, as F.F., recoil and the variable-ratio replay operations, the tangent plane that search is necessary monitors by DC to become to be grouped into simultaneously, and is presented at the image that shows on the lead-out terminal 19.Then, order is write down the time code starting point and the end of a period point of the necessary tangent plane that is found.In addition, also write down the indication information of the suitable playback speed of selected tangent plane.Further again, write down the indication information of selected tangent plane group playback order.

Secondly, the corresponding time code table of necessary tangent plane that has produced with content of edit dial gauge generator 151, the indication information of the playback speed that relevant tangent plane is suitable with the indication information of relevant tangent plane playback order, is sent to magnetic tape reproducing device 42 and magnetic tape recorder 152.Magnetic tape reproducing device 42, according to the content by content of edit dial gauge 151 indication, resetting is once more become to be grouped into by DC composition and AC, and has been recorded in the vision signal in tape 41 a certain zones.The DC composition and the AC composition of the vision signal of being reset by magnetic tape reproducing device 42, recorded tape 153 on by magnetic tape recorder 152 compilations this moment.The vision signal that is recorded on the tape 153 is inserted another reproducer, and the signal of being reset can be aloft as the vision signal of broadcasting usefulness.In addition, repeat aforesaid operations,, can carry out more detailed edit operation by vision signal being inserted the method for magnetic tape reproducing device 42.

In the 8th and the 9th embodiment, in a kind of operator scheme, the DC composition is by representing composition extractor 14 to extract from the signal that magnetic tape reproducing device 42 is reset, record on the disk 142, if magnetic tape reproducing device 42 is with the rate playback signal higher than common speed (in the special effects playback pattern), so, contained pictorial information on the screen, concerning each frame frequency, covered many frames, but can shorten the time that transmission is finished.In this case, if the replay rate of magnetic tape reproducing device 42,5 to 10 times of being set at common speed are high like that, under the situation of common video signal material, can obtain to be enough to discern the image quality of its content.Under the situation of disk 142 replay signal, with the ratio of magnetic tape reproducing speed with recording rate on disk 142, replay signal can be reproduced original replay rate at a slow speed.

As mentioned above, in the 8th and the 9th embodiment of the present invention, apparatus for processing of video signals constitutes like this, promptly represent the composition extractor to represent composition and represent the vision signal of composition non-representative composition in addition from being separated into, extract and represent composition, and can only represent composition, on visual display unit (or showing lead-out terminal), carry out graphics monitor and show with these.Therefore, to press the vision signal of standard compression signal resulting signal in studio according to discrete cosine transform (DCT) as above-mentioned form, and with by the resulting DC composition of DCT as representing composition, in this way, represent the data rate of composition can be reduced to very low level, and the recording capacity of the 2nd recording medium can be very little.

Under the situation of utilizing disk as the 2nd recording medium, because all vision signal materials that are recorded on the tape that generally is used as the 1st recording medium, can not all be sent on the disk at once, from the expense of disk and the viewpoint of recording capacity problem, almost often be necessary needing from the tape selection in advance to carry out the work of the material of usefulness.This work can be undertaken by the VTR that operates the tape of resetting originally.But tape is the journal medium, the operation response speed poor performance of this recording medium, and carry out this work and want the expensive time.On the other hand, according to the present invention, this work consuming time can be carried out on the disk with good accessibility, and the needed operating time can shorten greatly.

In addition, owing to only be to represent composition to be used to represent the composition extractor to extract, do not need the video compressor/expander that provides expensive separately.

Again furtherly, in the 1st operator scheme, promptly be recorded in the representative composition of the vision signal on the 1st recording medium, be extracted and be recorded on the 2nd recording medium, by making the 1st reproducer to be higher than the replay rate of common replay rate, come replay signal, the needed time of a series of editings can further shorten.Embodiment 10

Figure 16 is at the calcspar of the apparatus for processing of video signals of transmission equipment side among the 10th embodiment of the present invention.Figure 17 is at the calcspar of the apparatus for processing of video signals of receiver side among the 10th embodiment of the present invention.In Figure 16, what reference number 161 was represented is the frame signal extractor; The 162nd, frame memory; 163 is the 1st selectors; The 164th, control signal; The 165th, transmitter.In Figure 17, what reference number 171 was represented is the control signal generator; The 172nd, select signal; 173 is the 2nd selectors; The 174th, the frame signal processor; The 175th, non-representative component is augmented device; The 176th, frame memory; The 177th, control signal; The 178th, register/reproducer; 178a is a recording medium, and 178b is a monitor; The 179th, receiver.

At first, will be with reference to the operation of Figure 16 explanation at transmission equipment side.Magnetic tape reproducing device 42 is reset from the vision signal on the tape 41, and this vision signal has been separated into to be represented composition and represent composition non-representative composition in addition.Frame signal extractor 161 extracts frame signal, or with magnetic tape reproducing device 42 output signals in a corresponding signal of screen, then frame signal is recorded in the frame memory 162.Also have, if necessary, frame signal extractor 161, the frame signal of playback record in frame memory 162, and frame signal outputed to the 1st selector 163.Frame signal extractor 161, with arbitrary interval to representing numerous frame of moving image, carry out extracting section.For example, by the extracting section to multiframe, frame signal extractor 161 per seconds are only exported 2 or 3 frames.This extracts at interval, is decided by the data rate of transmission line.

Represent composition extractor 14, from the vision signal of above-mentioned form, only extract and represent composition, will represent composition to output to the 1st selector 163 thus, as representing into sub-signal.

According to control signal 164, the 1 selectors 163 from transmitter 165 outputs, perhaps select frame signal, perhaps select to represent into sub-signal, then with the signals selected transmitter 165 that outputs to.Transmitter 165 as the 1st transmission signals, outputs to external transmission lines 82 with the signal of the 1st selector 163 outputs.Have, transmitter 165 is accepted the 2nd transmission signals by external transmission lines 82, then this signal is outputed to the 1st selector 163, as control signal 164 again.

Secondly, will the operation of receiver side be described with reference to Figure 17.

According to selecting signal 172, control signal generator 171 is exported control signal 177 to the 2nd selector 173 and receiver 179.Receiver 179 outputs to external transmission lines 82 with the control signal 177 that receives, as the 2nd transmission signals.Have, receiver 179 by external transmission lines 82, receives the 1st transmission signals again, and the 1st transmission signals that will receive then outputs to frame signal processor 174, if the 1st transmission signals is a frame signal; The 1st transmission signals that perhaps will receive outputs to non-representative composition and augments device 175, if the 1st transmission signals is to represent into sub-signal.

Frame signal processor 174 will record on the frame memory 176 from the next frame signal of receiver 179 outputs.Have again, frame signal processor 174, the frame signal of playback record on frame memory 176, then with frame signal as being compressed vision signal, output to the 2nd selector 173.When frame signal is when representing the frame signal of a moving image, frame signal is that unit extracts with the frame according to transmitted data rates, as compressed vision signal output.On the other hand, when frame signal is when representing the frame signal of a still frame, frame signal can repeat output repeatedly as compressed vision signal.

Non-representative composition is augmented device 175, the signal of a non-representative composition of replacement is augmented represented on the sub-signal, and the signal that this was augmented outputs to the 2nd selector 173 then.Have, non-representative composition is augmented device 175 and seldom is required to export a signal of augmenting again.For example, non-representative composition is augmented device 175 work, makes and represents composition to be handled by a suitable filter.

According to the output of control signal 177, the 2 selectors selection frame signal processor 174, perhaps select non-representative composition to augment the output of device 175, then, register/reproducer 178 is delivered in selected output.Register/reproducer 178 is recorded in selected output signal on the recording medium 178a, perhaps with selected output signal, outputs to monitor 178b.Recording medium is not limited to tape type medium, also can be to the magnetic disc type medium, as HDD.

In this case, control signal 177 is such control signals: when the 1st selector 163 is selected the output of frame signal extractor 161, make the 2nd selector 173 select the output of signal processor 174, and when the 1st selector 163 is selected to represent the output of composition extractor 14, make the 2nd selector 173 select non-representative composition to augment the output of device 175.

All there is the embodiment of independent separately function to be described to supposition transmission equipment side and receiver side.Another kind method is that transmission equipment side and receiver side can constitute separately and can realize transmission and receive two kinds of functions.

In addition, control signal generator 171 is provided at receiver side in this embodiment.Other method is that control signal generator 171 can be provided at transmission equipment side.In this case, control signal 164 through the selector and the transmission line of transmission equipment side, is sent to the selector of receiver side.

Embodiment 11

Figure 18 is the calcspar of the apparatus for processing of video signals among the 11st embodiment of the present invention.It should be noted that the 11st embodiment is the concrete device of the 10th transmitter 165 among the embodiment.In Figure 18, what reference number 181 was represented is pci bus; The 182nd, insert memory; The 183rd, hard disk; The 184th, CPU; The 185th, modulator-demodulator; The 186th, extend the data wire of coming from the 1st selector 163; The 188th, external transmission supplies 82 data wire; The 189th, the control line of external transmission lines 82.

Supplied with by the 1st selector 163 shown in Figure 16, by the input signal of data wire 186, the pci bus 181 from Figure 18 is passed through, and is stored in to insert in memory 182 or the hard disk 183.CPU184 will be recorded in the input signal that inserts in memory 182 or the hard disk 183, be transported to code modulation decoder 185, and will by pci bus 181, output to the 1st selector 163 from the control signal 164 of code modulation decoder 185 outputs.185 pairs of input signals of modulator-demodulator carry out prearranged signal to be handled, and exports the 1st transmission signals thus, delivers to external transmission lines 82 through data wire 188 and control line 189.Have, modulator-demodulator 185 receives the 2nd transmission signals by external transmission lines 82, exports this signal then as control signal 164, delivers to pci bus 181 again.With identical operations, not specified (NS) here among the 10th embodiment.

In this embodiment, input signal by hypothetical record in inserting memory 182 or hard disk 183.But input signal not only can be recorded in and insert in memory or the hard disk, and can be recorded in any other medium.Also have, pci bus is supposed as the bus of transferring input signal and control signal 164 therein.Change a kind of method, isa bus also can use.In addition, what suppose is modulator-demodulator 185, exports the 1st and transmits signals on the external transmission lines 82, and receive the 2nd transmission signals through external transmission lines 82.But any other circuit beyond the modulator-demodulator 185 also is operable, as long as this circuit can pass through external transmission lines 82 input and output signals.

Embodiment 12

Figure 19 is the calcspar of the apparatus for processing of video signals among the 12nd embodiment of the present invention.It should be noted that the 12nd embodiment is the concrete device of the 10th receiver 179 among the embodiment.In Figure 19, receiver 179 comprises: the computer 195 that contains CPU184; Insert memory 182; Hard disk 183; Pci bus 181; Modulator-demodulator 191.What reference number 196 was represented is the data wire of external transmission lines 82; The 197th, the control line of external transmission lines 82; The 198th, lead to the data wire that non-representative composition is augmented device 175 and frame signal processor 174; In this 12nd embodiment, identical among the overall structure of apparatus for processing of video signals and the 10th embodiment.

Modulator-demodulator 191 receives the 1st transmission signals by external transmission lines 82; Carrying out prearranged signal to the received signal handles; Then, the signal that will handle by pci bus 181 outputs to and inserts memory 182 or hard disk 183.Modulator-demodulator 191 also carries out prearranged signal to control signal 164 to be handled, and thus, with the signal output of handling, delivers to external transmission lines 82 as the 2nd transmission signals.CPU184 will be recorded in the signal that inserts in memory 182 or the hard disk 183, output to frame signal processor 174 or non-representative composition is augmented device 175 by pci bus 181.In this case, when the output signal of modulator-demodulator 191 was frame signal, this frame signal just was output to frame signal processor 174.On the other hand, when output signal is when representing into sub-signal, this is represented into sub-signal and just is output to non-representative composition and augments device 175.Have again,, be output to modulator-demodulator 191 through pci bus (181) from the control signal 164 of control signal generator 171 outputs.Here, not elsewhere specified operation is identical with the operation of the 10th embodiment.

In this embodiment, the output signal of modulator-demodulator 191, by hypothetical record in inserting memory 182 or hard disk 183.But output signal not only can be recorded in to be inserted in memory and the hard disk, and can be recorded in any other medium.Also have, pci bus is supposed as being used for the output signal of transmission modem 191 and the bus of control signal 164 therein.Another kind method, isa bus also can be used.In addition, suppose it is code modulation decoder 191, export the 2nd and transmit signals to external transmission lines 82, and receive the 1st transmission signals through external transmission lines 82.But any other circuit beyond the modulator-demodulator 191 also is operable, as long as this circuit can pass through external transmission lines 82 input and output signals.

Figure 20 is the 12nd an embodiment key diagram of the present invention.It should be noted that explanation to this 12nd embodiment, usefulness be a concrete form of the 10th compressed video signal among the embodiment.In Figure 20, compressed video signal is made up of a plurality of frame signals 201.Be each frame signal 201, a plurality of packets of information 202 are set.In each packets of information 202, a frame front end mark zone 203 and a data field 204 are arranged.The 1st packets of information of the 1st frame, the 1st packets of information that is called as the 1st frame front-end information bag 205, the 2 frames is called as the 2nd frame front-end information bag 206.Frame front end mark 203 in the front-end information bag of each frame is called as " front end ", and other frame front end marks 203 in other packets of information of each frame are called as " non-front end ".The overall structure of the apparatus for processing of video signals among the 12nd embodiment, identical with among the 10th embodiment.

Compressed video signal is sent out by being divided into a plurality of packets of information 202.Whether the frame signal extractor 161 shown in Figure 16 by detecting the content of frame front end mark 203, can be in the frame front end by the determination information bag.In this case, frame signal extractor 161 from the 1st frame front-end information bag 205 to being right after packets of information before the 2nd frame front-end information bag 206 that the 1st frame occurs as a frame, extract this section thus as frame signal.Here, the operation of not specified (NS), identical with among the 10th embodiment.

In this embodiment, the frame front end mark 203 shown in Figure 20 is positioned the front end of packets of information 202.But frame front end mark 203 can be in any position in the packets of information 202.

Figure 21 also is the figure of explanation the 12nd embodiment of the present invention.It should be noted that the explanation to this 12nd embodiment, is that the vision signal among the 10th embodiment of hypothesis is interleaved signal.In Figure 21 (a) portion, a 211a, the field that 211b and 211c are made up of odd-numbered scan lines, and the field that a 212a and 212b are made up of the even-line interlace row.For each, involved in the field with the scan line 213 that solid line is represented, and the scan line 214 that dots does not comprise in the field.Shown in (b) portion of Figure 21, odd-numbered scan lines 216 and even-line interlace row 217 are staggered in a frame 215.

Figure 22 is the figure of explanation the 10th embodiment variant of the present invention.It should be noted that in Figure 22 the vision signal among the 10th embodiment is assumed to be non-interlaced sweep signal.In Figure 22 (a) portion, a 221a, three frames in succession that 221b and 221c represent.Shown in Figure 22 (b), frame 222 is made up of a plurality of scan lines 223 that are scanned in the scan period at vertical single file.

Figure 23 represents a kind of form of the 10th compressed video signal among the embodiment.In Figure 23, compressed video signal is made up of a plurality of packets of information 202.In each packets of information 202, a signal identification mark district 231 and a data field 204 are arranged.Signal identification mark 231 is that the indication vision signal is the interleaved signal or the mark of non-interlaced scan signals.

At first, the vision signal of interleaved signal or a type will be specified.Shown in (a) portion of Figure 21, interleaved signal is a kind of vision signal, wherein, and only many and many staggered appearance of forming by odd-numbered scan lines of only forming by the even-line interlace row.For example, have only odd-numbered scan lines to field 211a constantly, and have only the even-line interlace row at t1 field 212a constantly.In this case, frame 215 becomes the frame that is comprehensively formed by field 211a and 212a, shown in (b) portion of Figure 21.More particularly, be included in the many scan lines in the frame 215, odd-numbered scan lines 216 is scan lines of a 211a, and even-line interlace row 217 is scan lines of a 212a.In this case, because a 211a and a different image constantly of 212a representative in frame 215, produce a time slot between odd-numbered scan lines 216 and the even-line interlace row 217.Consequently, when extracting from interleaved signal and showing single image, the gained image can thicken.Meet the vision signal of NTSC standard or TV signal commonly used and be exactly interleaved signal as shown in figure 21.

Secondly, the vision signal of non-interlaced scan signals or another kind of type will be specified.Shown in (a) portion of Figure 22, the difference of non-interlaced sweep signal and interleaved signal is that a 211a comprises whole scan lines.But the number of fields in a chronomere is half of number of fields of interleaved signal.Just just say, under the situation of using same time shaft as shown in figure 21, at moment t ₀, t ₂And t ₄, the field exists really, but at time t ₁And t ₃There is not an existence.In this case, because frame 222 only is made up of field 221a, not free gap produces between contiguous scan line 223.So, thicken the situation of interleaved signal even extract and show that single image, image can not resemble.

As mentioned above, under the corresponding visual situation of a transmission and a frame,, might obtain the high fidelity image by from non-interlaced scan signals, extracting frame signal.Therefore, compressed video signal is divided into many packets of information 202 as shown in figure 23, so that transmit.By the detection to the identification mark 231 of packets of information, the frame signal extractor 161 shown in Figure 16 can be judged the compressed video signal that is included in the packets of information, is interleaved signal or non-interlaced scan signals.Have only when compressed video signal is non-interlaced scan signals, frame signal extractor 161 just extracts frame signal.Here, the operation that is not illustrated, identical with the operation of the 10th embodiment.

Though in Figure 23, signal identification mark 231 is located in the front end of packets of information 202, this mark also can be positioned any other position in the packets of information 202.Have, in this embodiment, vision signal is supposed it both can is interleaved signal, can be again non-interlaced scan signals again.Another kind method, vision signal can be the signals that can switch arbitrarily between interleaved signal and non-interlaced scan signals.

Embodiment 13

Figure 24 is the calcspar of the apparatus for processing of video signals among the 13rd embodiment of the present invention.In Figure 24, reference number 241 expression compressor reducers.

Be recorded in the data on the tape 41, read, and be kept in the buffer 13, till the data corresponding to a frame have been read out by magnetic tape reproducing device 42.Be kept at the data in the buffer 13, have only the DC composition to be represented composition extractor 14 to extract.Because the DC composition also can be counted as vision signal, these compositions obtain the DC video data that compresses thus with compressor reducer 241 compressions.Compression DC video data by compressor reducer 41 obtains is recorded in the recording medium 18.

As mentioned above, in the 13rd embodiment, the video data that is become to be grouped into by DC is further compressed, utilize resulting compression DC data, the video data capacity in the per unit time can further be reduced.

Embodiment 14

Figure 25 is the calcspar of the apparatus for processing of video signals among the 14th embodiment of the present invention.In Figure 25, reference number 251 expression expanders.

Difference with the 13rd embodiment only is described below.By the DC composition of representing composition extractor 14 to extract, through compressor reducer 241 and the compression DC data that obtain in order to transmit, to be sent out device 81 and to do coding and subpackage processing, send out by external transmission lines 82 then.The data that are transmitted revert to original data by receiver 83, are recorded on the recording medium 18.

Be recorded in the compression DC data on the record body 18, be expanded device 251 expansions, like this, can obtain the video data that only becomes to be grouped into by DC.Through expander 251 and video data, from showing lead-out terminal 19 outputs, as easy displayed image.

As mentioned above, in the 14th embodiment of the present invention, by the DC composition that further compression is extracted, carry out the transmission line coding, the amount of information that is transmitted can significantly reduce, and does not damage the content of vision signal.Consequently, even the transmission rate of transmission line is very low, also can transmit moving image.

In the 14th embodiment, in case being received device 83, data receive, received data can be expanded device 251 expansions, therefore, without recording medium 18, can show easy image.

It should be noted that compressor reducer 241 can use any compression method in the 13rd and the 14th embodiment.In other words, compressor compresses DC composition is not subjected to the restriction on its method.

In aforesaid embodiment, represent composition to be assumed to be each M * N (M and N are integers) square here through the resulting DC composition of DCT.Yet,, still can obtain effect of the present invention even contemporary telogenesis is divided when also containing higher band component beyond the DC composition.For example, when one was used as the DCT square by 8 * 8 one-tenth squares that are grouped into, 2 * 2 compositions or 4 * 4 compositions in the lower band district of 8 * 8 squares also can be used as the representative composition.

Figure 26 represents 8 * 8 squares be made up of the DCT coefficient, and these coefficients carry out DCT to 8 * 8 pixel blocks to be handled and obtain.In Figure 26, what be illustrated in the upper left corner is the DC composition, and other compositions are AC compositions.In square, frequency content uprises to the right in the horizontal direction, and the frequency content in the square uprises downwards in vertical direction.If shown in 26, can from 8 * 8DCT square, extract at 4 * 4 compositions of low frequency range, as representing composition.

In addition, be not all binary digits that always are necessary to extract expression DC composition, the number of bits of the DC composition that is extracted can be selected arbitrarily according to recording capacity or transmission rate.

According to above-mentioned video signal processing method of the present invention, available software or hardware or both realize.Using software to realize under the situation of method of the present invention that software can be with the form dispensing of recording medium, software is recorded in wherein, perhaps by communication line or similar form dispensing.

According to the present invention, can obtain following effect at least: can the identification video signal under high speed; Recording capacity can reduce; Vision signal can transmit under the speed that reality allows, even the transmission capacity of transmission line is less relatively.

For the people who is familiar with this respect technology, under the situation that does not depart from scope and spirit of the present invention, various other distortion are obviously visible and are to realize easily.Therefore, and do not mean that appended scope, be confined to following narration, but claim can be explained widely.

Claims (4)

1, apparatus for processing of video signals comprises:

Represent composition extractor (14), this representative composition extractor receives a vision signal, this vision signal is distinguished non-representative composition and is represented composition, the representative composition that from the representative composition of combination and non-representative composition, to extract thus, wherein representing composition is flip-flop, and non-representative composition is an alternating component;

It is characterized in that:

Represent composition extractor (14) to produce shows signal, be used for showing simultaneously the image of a plurality of obvious reproductions, each image is by representing composition to constitute.

2, according to the apparatus for processing of video signals of claim 1, further comprise a display unit (178b), be used to show this shows signal.

3, according to the apparatus for processing of video signals of claim 1, further comprise a transmitter (81), be used for exporting this shows signal to transmission line (82).

4, according to the apparatus for processing of video signals of claim 3, further comprise a register (141), the representative composition that is used for only will extracting records recording medium (142).

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