CN1224304A - Digital video signal recording apparatus and digital video signal reproducing apparatus - Google Patents
Digital video signal recording apparatus and digital video signal reproducing apparatus Download PDFInfo
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Abstract
A digital video signal recording and reproducing apparatus is disclosed which includes: a recording portion for recording a digital video signal having a first resolution on a recording medium; a division-converting circuit for converting a still picture video signal having a second resolution higher than the first resolution into a division-converted signal through dividing the still picture video signal by n; and an auxiliary data generation circuit (43,36) for generating first auxiliary data indicative of the n and second auxiliary data indicative of a frame size of the still picture video signal. The HDS video signal of a still picture image is divided and dummy data is inserted to convert it into the SD video signal.
Description
The present invention relates to digital video signal recording device and digital video signal regenerating unit.
Digital video signal recording device and digital video signal regenerating unit are well-known.
The standard (hereinafter being called " DVC " standard) that someone has proposed to be called " DVC " as the standard of the digital VTR (video tape recorder) by the data compression recording video data (for example, 41 the 2nd phases of volume of country's technical report (National Technical Report), April nineteen ninety-five is from 48 pages to 55 pages).In this DVC standard, there is a standard to be used to record the vision signal of the general resolution of current broadcast level (SD signal), also have a standard to be used for record and have more high-resolution vision signal (HD signal).The overview of record SD signal standards hereinafter will be described.
In 525/60 method (the NTSC method is corresponding therewith), vision signal is taken a sample with (4: 1: 1).For brightness (Y) signal, the effective number of picture elements of horizontal direction is that vertical direction active line number is 480 in 720, one frames; For color difference (Cb and Cr) signal, the effective number of picture elements of horizontal direction is 180, and vertical direction active line number is 480, and is identical with the line number of luminance signal.
Fig. 9 A demonstrates to 9C and is used for the DCT computing and the prior art of piecemeal.Effectively pixel data is cut apart, data block to be provided and to make DCT (discrete cosine transform) computing effective.The data block (below be called " DCT piece ") that is used for the DCT computing is respectively a frame of brightness (Y) signal and color difference (Cb and Cr) signal to be cut apart, and is a formation with level 8 pixels * vertical 8 pixels.So, shown in Fig. 9 A to 9C, corresponding to a DCT piece of DCT piece of 4 DCT pieces of Y-signal of the same area of same position on the panel and Cb signal and Cr signal altogether 6 DCT pieces be known as " macro block ".
Figure 10 A and 10B demonstrate the screen format of prior art and the part enlarged drawing of screen format.Have, a frame panel is that the unit is cut apart with 27 macro blocks again, thereby constitutes the superblock (super block) shown in Figure 10 A.So each row respectively selects one from Figure 10 A, selects a macro block from each superblock, and constitutes a video blocks by 5 macro blocks.When compression, data volume is controlled by each video-frequency band unit in predetermined amount.
For the DCT computing, dual mode is arranged, be effective 8 * 8DCT mode (be each frame unit multiply by vertical 8 pixels carry out effective DCT) and effective 8 * 4DCT mode (be each frame unit multiply by vertical 4 pixels carry out effective DCT) with level 8 pixels with level 8 pixels, and between the DCT separately in two territories (field) coefficient, sue for peace and ask difference operation, and on coding, switch them adaptively.The DCT coefficient that is obtained by the DCT computing quantizes with one of selected quantization table, so as to quantize and Variable Length Code after data volume be equal to or less than a value of pre-determining and a value of the approaching value of pre-determining.
What Figure 11 showed is the data format of prior art, and Figure 12 is the synchronization blocks form of prior art.As shown in figure 11, quantize and Variable Length Code after data be cell formatization with each macro block, and with the synchronization blocks format record on tape, in synchronization blocks, added the parity check word that SYNC word, ID sign indicating number and error correction are used, as shown in figure 12.One-frame video data is divided into 10 roads (track) record.The super piece of every row of the video data shown in Figure 10 A is designated as together.Figure 13 provides one form of prior art.
Formatted data shown in Figure 11 comprises the necessary various parameters of decoding (mistake and hide the STA information of using, selected quantification table number QN0 or similar other parameters).The storage of a video-frequency band is in 5 synchronization blocks.Dc (direct current) component data is stored in the DC district (DC0 to DC5) among the figure, and ac (interchange) component is stored in the AC district.The ac component be stored in the essentially identical synchronization blocks of dc component place synchronization blocks in the AC district of corresponding DCT piece.Yet, if being higher than, data volume specifies outer capacity, use free AC district in the same synchronization blocks and the free AC district in the same video-frequency band.
In ID sign indicating number shown in Figure 12, there is road and checks the number the initial road number of counting in indication the 1st road from 10 roads with the synchronization blocks in the synchronization blocks number indication number.Have, also have sequence number (SEQ.No.) in the ID sign indicating number of the synchronization blocks of stored video data, this is that 12 frames of order are specified from 0 to 11 as sequence number.
In Figure 13, ITI represents ITI (inserting and road information) section, and wherein essential record is used for being easy to the control desired data at insertion one editing process.AUDIO represents by 9 synchronization blocks of stores audio data and stores 5 audio sections that synchronization blocks constitutes of outer parity.VIEDO represents a video-frequency band, and wherein 135 synchronization blocks are used for stored video data, and 3 synchronization blocks are used to store auxiliary data (being called video AUX), and 11 synchronization blocks are used to store outer parity.SUBCODE represents the subcode section, is used for code information writing time and so on.Have, be called the part of slot among Figure 13 in addition, they are to be used for preventing when each segment unit of insertion-editor the destroyed required edge of other sections.
Someone proposed to utilize the method according to SD standard recording still frame by the VTR of DVC standard design, for example snap recording mode, stroboscopic recording mode, single shot recording mode and take recording mode in succession.
The snap recording mode is that a width of cloth still frame is write down several seconds on tape, the stroboscopic recording mode is to write down some still frames by switching from each unit of several to dozens of frames, the single shot recording mode is that a width of cloth still frame for example is recorded on 5 frames, is repetition single shot record and take recording mode in succession.
Figure 14 A is the sequential chart of the prior art of each recording mode to 14E.Wherein define PPID sign, FC sign, ST sign and SC sign, be used to distinguish the recording mode of each recording mode of still frame and motion picture.In 14E, these signs have been set as an example at Figure 14 A.That is, the PPID sign is made as " 0 ", and expression begins to continue 5 seconds as universal law from the record still frame.Have again, be masked as " 0 ", when then being masked as " 0 " the PPID sign is made as " 0 " at SC if set SC.When this frame picture is identical with next-door neighbour's former frame picture, then FC sign is made as " 0 ".When the time difference between the picture of two fields in the frame was approximately zero, the ST sign was changed to " 0 ".The SC sign is changed to " 0 " when the record picture is still frame.In Figure 14 B, " single " represents single recording mode of clapping.
The purpose of this invention is to provide a kind of improved digital video signal recording device and improved digital video signal regenerating unit.
The invention provides a kind of digital video signal recording device, comprising: tape deck (21-27) is used for the digital video signal that record has first resolution on recording medium; Subregion-translation circuit (65,67) is used for coming the signal after the still frame video signal conversion Composition Region conversion with second resolution (being higher than first resolution) by the still frame vision signal being divided into n part (n is the natural number greater than 1); And auxiliary data produces circuit (43,36), second auxiliary data that is used to produce first auxiliary data of indication n value and indicates still frame vision signal frame sign.Recording section signal and first and second auxiliary data after the subregion conversion is recorded on the recording medium.
In the digital video signal recording device, the ratio of the number of picture elements of the number of picture elements of the luminance signal of auxiliary data generation circuit generation auxiliary data indication still frame vision signal and the color difference signal of this still frame vision signal, recording section is recorded in the 3rd auxiliary data on the recording medium again.
In the digital video signal recording device, its recording section comprises the video data compression circuit, and it is by to comprising every signal that carries out after the subregion conversion is compressed in orthogonal transform of predetermined number of picture elements; A subregion translation circuit, this circuit comprises: virtual data produces circuit, and being used for the piece is that the unit produces virtual data and it is joined by the still frame vision signal of subregion, to produce the signal after the subregion conversion; And one change circuit (43,65,67,68a), order of its response remove to change the ratio of static picture video signal data number in the virtual data number that produced in the signal after the frame subregion conversion and the frame, and change n value.Auxiliary data produces the 4th auxiliary data that circuit produces this ratio of indication, and recording section is recorded in n value and the 4th auxiliary data after changing on the magnetizing mediums.
In the digital video signal recording device, the subregion translation circuit is pressed pre-determined number (greater than once) output one frame; Auxiliary data produces circuit and produces the 3rd auxiliary data to indicate this pre-determined number, and comprise a counting circuit and count exporting after the conversion of same frame subregion the number of times of signal, also produce the 4th auxiliary data and indicate this count value, and recording section is recorded in this third and fourth auxiliary data on the recording medium again.
The digital video signal recording device may further include: tighten video signal generation circuit (68b), be used for having the deflation vision signal of first resolution from the still frame video signal generating, thus the vision signal that a frame video signal is tightened corresponding to a frame.Recording section with the signal record of first mode after the subregion conversion on tape, and with second mode the video signal recording that tightens on tape.
The digital video signal recording device can also comprise: simple video signal generation circuit (74), it has memory (75), be used for tightening video data from the still frame video signal generating, be accumulated in the memory tightening video data, and come to have the simple vision signal of first resolution, thereby make the image that comprises multiframe still frame vision signal in the image of the simple vision signal of a frame from static video signal generating by the deflation vision signal that reads accumulation from memory; This generation circuit (74) also is used to produce position data confirming the position of this multiframe on recording medium, and accumulates position data in memory.Recording medium, and writes down simple vision signal and position signalling on the tape from memory as the 3rd auxiliary data in second mode on tape with the signal record of first mode after the subregion conversion.
In the digital video signal recording device, just responded a record stop signal and after the signal after stopping the record partitioning conversion at recording section, i.e. simple vision signal of record and position data on recording medium.
In the digital video signal recording device, auxiliary data produces circuit and also produces the 3rd auxiliary data, to show the signal after will using a mask off command with the subregion conversion that shields this regeneration in a regenerating unit that signal after the subregion conversion of regeneration is not reverted to this function of first vision signal.
According to the present invention, a kind of digital video signal regenerating unit is provided, comprise; Regenerative circuit (28-35) is used for bearing from recording medium the vision signal and the auxiliary data of first resolution again, and this auxiliary data is about constitute the used data of a frame still frame vision signal from the multi-frame video signal; Still frame video signal generation circuit (66,67,68) is used to produce the still frame vision signal, for example constitutes a frame still frame vision signal according to auxiliary data from the multi-frame video signal.
The digital video signal regenerating unit may further include: the auxiliary data that has memory (37) reads circuit (31,36), be used to read auxiliary data, these auxiliary datas indicate the position data that is recorded in the still frame vision signal on the recording medium in the recorded video signal ending, and these auxiliary datas are stored in the memory; And search circuit (36), it responds a search command, according to the one frame still frame vision signal of the auxiliary data removal search in the memory.
By detailed description considered in conjunction with the accompanying drawings hereinafter, will more be clear that purpose of the present invention and characteristics, these accompanying drawings are:
Fig. 1 is the block diagram of digital video signal recording according to an embodiment of the invention and regenerating unit;
Fig. 2 is the block diagram of the hand-off process of vision signal shown in Fig. 1 circuit;
Fig. 3 A is the block diagram of the circuit of recording processing shown in Fig. 1;
Fig. 3 B is the block diagram of regenerative circuit shown in Fig. 1 69;
Fig. 4 A is a key diagram of present embodiment to 4C, illustrates by first mode Y-signal is divided into 8 parts;
Fig. 5 A is a key diagram of present embodiment to 5C, and the macro block of Y-signal and color difference signal Cr and Cb is described;
Fig. 6 is a key diagram of present embodiment, demonstrates the cutting operation by second mode;
Fig. 7 A and 7B are key diagrams of present embodiment, demonstrate the bit format of bag data;
Fig. 8 A and 8B are the time diagrams of present embodiment, demonstrate the operation of record HD still frame signal;
Fig. 9 A is the key diagram of prior art to 9C, demonstrates each piece of DCT computing;
Figure 10 A and 10B are the key diagrams of prior art, demonstrate the part enlarged drawing of screen format and screen format;
Figure 11 is the key diagram of prior art, demonstrates data format;
Figure 12 is the key diagram of prior art, demonstrates the form of synchronization blocks;
Figure 13 is the key diagram of prior art, demonstrates form; And
Figure 14 A is the time diagram of prior art to 14E, demonstrates each recording mode.
Identical or corresponding component in each figure or part are endowed identical reference symbol.
Embodiment of various details.
Fig. 1 is the block diagram of digital video signal recording according to an embodiment of the invention and regenerating unit.
Digital video signal recording and regenerating unit are made up of vision signal hand-off process circuit 1 and video signal recording and regenerating unit 2.Fig. 2 is the block diagram of the hand-off process of vision signal shown in Fig. 1 circuit 1.
As shown in Figure 2, vision signal hand-off process circuit 1 chief component is: input 61 is used for input digit SD signal, input 62 is used for the static vision signal of input digit high-resolution (to call " HDS signal " in the following text), output 63 is used to export the HDS signal of regeneration, output 64 is used to export the SD signal of regeneration, and the first and second HD frame memories 65 and 66 are used to store every frame unit of HDS signal.
Fig. 3 A is the block diagram of the circuit of recording processing shown in Fig. 1 68.Recording processing circuit 68 comprises: virtual data increases circuit 68a, and being used for increases virtual data to the output of HD frame memory 65, and the color difference signal tightens circuit 68b, is used for tightening the pixel that horizontal direction color difference signal, and switching circuit 68C.
Fig. 3 B is the block diagram of regenerative circuit shown in Fig. 1 69.Reproduction processing circuit 69 comprises: virtual data is removed circuit 69a, is used for removing the virtual data that is added on the record from regenerated signal, and color difference signal interpolation circuit 69b is used for the pixel of interpolation horizontal direction color difference signal and switching circuit 69C.
In the present embodiment, the effective number of picture elements of horizontal direction of supposing the Y-signal of HDS signal is 1280 (hereinafter the frame of HDS signal to be called " HD frame ", the frame of SD signal is called " SD frame "), active line number in vertical direction one frame is 1024, horizontal direction Cr and Cd signal number of picture elements are 640 (this is half of the effective number of picture elements of horizontal direction of Y-signal), vertical direction Cr and Cd number of signals are 1024, and this is identical with Y-signal.
The HDS signal of input is provided for a HD frame memory 65 and address control circuit 67, and a HD frame of HDS signal is stored in a HD frame memory 65.The address (it is described to see below) that a HD frame memory 65 is read in address control circuit 67 control is to interweave or to arrange the pixel of HDS signal.The HDS signal of reading from HD frame memory 65 (hereinafter being called " signal after the subregion conversion ", to be different from the HDS signal of input) is provided for commutation circuit 70 and 71.
Be provided for commutation circuit 71 from the regenerated signal of video signal recording and regenerative circuit 2 inputs.Commutation circuit is selected the signal after the subregion conversion when " record ", select regenerated signal when " regeneration ", and be entered into SD frame memory 74.Memorizer control circuit 75 when record by tighten fall the subregion conversion after signal pixel (not writing) thus produce simple vision signal corresponding to the HDS signal of input, and deposit it in SD frame memory 74 in proper order.Have again, taking in succession under the style of shooting in succession of multiframe, wish only to produce simple vision signal corresponding to HDS signal first frame and the last frame.The simple vision signal of Chan Shenging can make and comprise for example 100 frames of HDS signal in the SD frame like this.
The output signal of SD frame memory 74 is provided for commutation circuit 70 and 73.Commutation circuit 70 or select SD signal, the signal after the subregion conversion or the simple vision signal of input, and it is offered the piece formation circuit 21 of video signal recording and regenerative circuit 2.When the recording operation in succession of HDS signal finished at that time, commutation circuit 70 was controlled just to continue the simple vision signal of record when the record end.
In the present embodiment, video signal recording and regenerative circuit 2 comprise the VTR according to the DVC standard, and it is known as " VTR part 2 ".The video signal recording system of VTR part 2 mainly comprises: piece forms circuit 21 and is used to the DCT computing to form pixel block.DCT circuit 22 is used to make the DCT computing to come into force, quantitatively circuit 23 is used to make quantification to come into force, VLC (Variable Length Code) circuit 24 is used to make Variable Length Code, auxiliary data increases circuit, be used in subcode district increase auxiliary data, increase video AUX data and insert control data, error correction code circuit 26 is used for increasing the error correction parity check bit to video data, synchronization blocks forms and modulation circuit 27 is used to form synchronization blocks and modulates to be recorded on the tape 41, and magnetic head 28 is used for the tracer signal of modulation is recorded in tape 41.
The video signal regeneration system comprises: magnetic head 28 is used for from tape 41 data of regenerating; SYNC detects and demodulator circuit 29, is used to detect synchronization blocks and demodulation is come into force; Error correction decoding circuit 30 is used for realizing error correction according to the parity check bit of reading; Auxiliary data reads circuit 31, is used for reading auxiliary data, video AUX data and the control data of subcode section; VLD (variable-length decoding) circuit 32 is used to realize variable-length decoding; Inverse quantization circuit 33 is used to realize re-quantization; Inverse DCT circuit 34 is used to realize the inverse DCT computing; And pixel (rearranging) circuit 35 that interweaves is used to the pixel that interweaves.
Have, CPU36 response auxiliary data increase by 25 and auxiliary data read circuit 31 again.CPU36 produces and controls the auxiliary data increase and reads.Memory 37 is used to store auxiliary data, main usefulness for inquiry.
The interweave output signal of arranging circuit 35 of the pixel of VTR part 2 is provided for the commutation circuit 71 and 72 of vision signal hand-off process circuit 1.When regenerated signal was the SD signal, commutation circuit 72 outputed to commutation circuit 73 1 sides to regenerated signal; During signal after regenerated signal is the subregion conversion, then commutation circuit 72 outputs to the 2nd HD frame memory 66 to it by reproduction processing circuit 69.When the signal after the subregion conversion of regenerating, address control circuit 67 is controlled the address of reading of HD frame memories 66, the arrangement of the pixel that is interleaved during with recovery record, and control is read the address, the HD Frame of input sequence output when writing down to press.
Next, when being described in record HDS signal to HD frame subregion with interweave and arrange the method for pixel.
The HDS signal of input is stored in the HD frame memory 65 and is divided into 8 to one, makes a panel be divided into 8 screen areas, and this divided HDS is converted into corresponding to a frame SD signal (a SD frame) and is imported into VTR part 2.
Fig. 4 A is the key diagram of present embodiment to 4C, has illustrated under first mode (a HD frame is divided into 8 parts mode) Y-signal is divided into 8 parts method.Fig. 5 A is the key diagram of present embodiment to 5C, and the macro block of Y-signal and color difference signal Cr and Cb has been described.
More particularly, a HD frame is divided into 4 parts in the horizontal direction, and each district in the A after vertical direction is divided into 2 parts, cuts apart, B, C, D, E, F, each district of G comprises vertical 512 pixels of level 320 pixel X.Because a SD frame comprises level 720 pixels * vertical 480 pixels, thus each district from A to H and do not correspond to a SD frame of former state, thus inserted virtual data, and mobile as follows pixel:
At first, shown in Fig. 4 B, insert virtual data to the HDS signal, make and be divided into each zone (level 320 pixels * vertical 512 pixels) of 8 parts, per 8 pixels of along continuous straight runs insert the virtual data (level 8 pixels * vertical 512 pixels) of 8 pixels, so that level 640 pixels * vertical 512 pixels to be provided.The value of virtual data is " 16 " entirely.In Fig. 4 B, for convenience, shown in the width of 8 pixels of horizontal direction be exaggerated.
Next, shown in Fig. 4 C, make the lower left corner (shown in the figure) in zone of level 640 pixels * vertical 512 pixels consistent, set up corresponding relation with this with the lower left corner of SD frame.Then, the pixel (level 640 pixels * vertical 32 pixels) of non-corresponding district R1 is moved on to the outer peripheral areas R2 (level 80 pixels * vertical 256 pixels) on SD frame right side.In the process of doing like this, the mobile of pixel is mobile as much as possible as the unit with each minimum unit of level 8 pixels * some vertical pixels.Have, Y-signal is to move as much as possible with each such unit again, because shown in Fig. 5 A, level 32 pixels * vertical 8 pixels constitute a macro block.In the drawings, in 4 DCT pieces 2 of hatching form by virtual data.Storage data " 16 " are as virtual data in the R3 district shown in the hacures that are tilted to the right in the SD frame (level 80 pixels * vertical 224 pixels).As previously mentioned, so just constituted a SD frame of Y-signal.
Have, Cr and Cb signal and Y-signal are divided into 8 parts similarly again, constitute each district and comprise level 160 pixels * vertical 512 pixels.Then, shown in Fig. 4 C, make by the lower left corner of divided area consistently, set up corresponding relation with this with the lower left corner of SD frame.Then, the pixel (level 640 pixels * vertical 32 pixels) of non-corresponding district R1 is moved on to the right side outer peripheral areas R2 (level 80 pixels * vertical 256 pixels) of SD frame.In the process of doing like this, the mobile of pixel is mobile as much as possible as the unit with each minimum unit of level 8 pixels * vertical 8 pixels.
As previously mentioned, converted to the pixel data of SD signal one frame in succession corresponding to the pixel data of the eighth Y-signal of HDS signal, Cr signal and Cb signal, thereby a HD frame transform that makes the HDS signal becomes 8 SD frames of vision signal, and is entered into VTR part 2.
In the register system of VTR part 2, except carrying out signal processing such as DCT computing, quantification, variable length code, also to realize hereinafter described special processing to the HDS signal, then video information recording on tape 41.In the DVC standard, a SD frame of video data is recorded on 10 roads.Therefore this 10 road is known as a road frame.
In first mode, be recorded in (80 road) on 8 road frames corresponding to 8 SD frames of a HD frame.In other words, the address control circuit 67 of vision signal hand-off process circuit 1 realizes that 8 output of control is divided into a SD frame of 8 parts.
Have again, indication is divided into a HD frame 8 parts supplementary (dispenser), indication is the supplementary (repeat number) of a SD frame recording 8 times, indication is from the supplementary of this frame number of road frame initial calculation, the supplementary (source picture classification) of the classification of the panel size (horizontal direction number of picture elements and vertical direction number of picture elements) of the HDS signal of indication input, the luminance signal number of picture elements of the HDS signal of indication input and the supplementary (color rate) of the ratio of two color difference signal number of picture elements, the supplementary of the signal in not possessing the regenerating unit that the signal after cutting apart the resulting subregion conversion of HDS signal is reverted to original HDS semiotic function after the conversion of shielding (sheltering) subregion, and the supplementary of expanded function all is stored in the subcode district, and this is the supplementary recording areas of each road frame.
As expanded function, after a split screen number and the frame subregion conversion in the signal virtual data count proportion and be made to the variable that can be provided with by the user, and the supplementary that this ratio is used as this expanded function is noted.The ratio regular meeting that increases virtual data (being absolutely empty) is increased in the data volume of giving actual video data in the DCT computing, thereby can improve the quality of reproduced picture.
Have, the supplementary of record indication number of repetition makes the operator can set number of repetition again, thereby can set up shooting speed in succession and avoid balance between the mistake by the seam effect when environment needs.
Fig. 7 A and 7B are the key diagrams of present embodiment, demonstrate the bit format of bag data (pack data).The bag data PC1 and the PC2 of the mark optional region that provides in the system data is provided above-mentioned supplementary.In other words, the supplementary of the indication panel number of partitions is at position B7 and the B6 of bag data PC1, the auxiliary data B5 to B3 on the throne of indication number of repetition, the supplementary of indication frame number writes down B2 to B0 on the throne, the supplementary of indication source picture classification is at the position B7 to B5 of bag data PC2, the supplementary B4 on the throne and the B3 of indication color difference ratio about the supplementary B2 on the throne of shielding, write down B1 on the throne and B0 about the supplementary of expanded function.This processing is according to finishing from the order of CPU36 by supplementary write circuit 25.
The supplementary of indication color difference ratio is indicated as being one of (4: 4: 4), (4: 2: 2), (4: 2: 0) or (4: 1: 1) four.Have again, the supplementary of indication source picture classification is following respectively one of group that the HDS signal panel size column of input is gone into, and a group number that obtains places this supplementary place, these panel size groupings are: level 720 pixels * vertical 960 pixels, level 1440 pixels * vertical 960 pixels, level 1024 pixels * vertical 1280 pixels, and level 1920 pixels * vertical 1036 pixels.
Can indicate that (sign of indication picture source and recording status (having or do not exist coding)) set about the supplementary of shielding and be recorded in according to SS wraps data PC1.
Have, in the present embodiment, a HD frame video signal is transformed into a SD frame video signal again, produces the signal that tightens after the conversion with the pixel of the HDS signal by tightening input, and its signal after the subregion conversion is recorded on the tape 41.This makes not possess under the situation that tracer signal is reverted to original HDS semiotic function easily by watching view finder according to the search of order realization to record HDS signal when regeneration.
Have again, in the present embodiment, when recording operation finishes in succession, the simple vision signal of record on tape 41.Meanwhile, indicate simple vision signal supplementary, specify the simple vision signal that provides by CPU36 the HDS frame record position supplementary (be the time code data (record date, Month And Year, the time, branch and second) or absolute Taoist monastic name) be recorded in presumptive area.
Fig. 8 A and 8B are the time diagrams of present embodiment, demonstrate the operation of record HD still frame signal.Even signal after in the single shot recording mode, also wanting 4 seconds of duplicate record corresponding to the subregion conversion of HD still frame signal.It is to consider if the single shot still frame is recorded in the operational capacity that video signal recording apparatus had on the tape 41 that can write down about one hour motion picture that this duplicate record is provided.Then, the signal after the deflation conversion was repeated to write down 1 second.The reason in 1 second of duplicate record is: if just finish another single shot record after a single shot record, then tape 41 will reverse slightly, so-called gap is returned, to obtain the continuity of recording figure forming on the tape 41, and become at the track seek servo device and to enter recording mode after stable, this Rio needs the track seek servo device was stablized in 0.7 second.Then, though in Proceed Backward Magnetic Tape is equivalent to 0.7 second the process of tape amount, finish recording mode mistakenly, will stay the signal after some frames tighten conversion.Therefore, the signal record after the deflation conversion is wanted effective 1 second.Have again,, then repeat this pattern (4 seconds+1 second) if shown in Fig. 8 A, repeat the single shot record.Taking in succession in the situation of record, might write down 15 frames at most in 4 seconds, because as previously mentioned, a HD frame is recorded on 80 roads.Have, single shot record and the differentiation of taking in succession between the record are by a short time of the record order key on decision operation person's push panel 42 (this is the single shot record) or pin its (this is to take record in succession) continuously again.
Shown in Fig. 8 B, in recording terminal end, simple vision signal write down for 1 second with above-mentioned supplementary.This is just to finish this recording operation according to tape 41 order of withdrawing from of for example sending from guidance panel 42 before removing to withdraw from tape 41.
Next, with the processing in the regenerative system of description VTR part 2.The data that are recorded on the tape 41 are reproduced and demodulation, are listed as with output digital data.From this data rows, detect SYNC (synchronously) word (with reference to Figure 11), and export a synchronizing data blocks.Utilize the inner parity code of synchronization blocks that the aforementioned playback of data that obtains is carried out error checking and corrects processing, in addition, also utilize the outer parity sign indicating number that video data and so on is carried out error checking and correction.Then, realize reading supplementary in succession, length-changeable decoding is handled (the contrary processing that variable length code is handled), quantizes contrary the processing and the DCT inverse operation.Have, pixel is rearranged into original alignment and offers the commutation circuit 71 and 72 of vision signal hand-off process part 1 again.
The signal of processing above-mentioned after for SD signal and subregion conversion is common.Have, when the signal after the conversion of regeneration subregion, supplementary reading circuit 31 reads the data in subcode district, cuts apart number, repeat number and frame number to obtain necessary supplementary such as panel again.Then, the information about the signal after the subregion conversion is provided for vision signal switching part 1.
The virtual data that adds when the reproduction processing circuit 69 of vision signal hand-off process part 1 removes record.Address control circuit 67 control is stored in address in the 2nd HD frame memory 66, the information about the HDS signal that follow provides from VTR part 2 under the control of control circuit 43 by control signal 43a to playback of data.
Similarly, be stored in the HD frame memory 66 in the data of whole 8 subregions, and from the HD frame memory, read as a HD frame.The panel size of the video image of reading or class likelihood data are to determine according to the supplementary that is recorded in the subcode district.Obtain the HDS signal of regeneration as previously described.
Have, in the present embodiment, if load tape 41 when regeneration, then tape 41 always is driven the end portion that moves to record, and enters regeneration with the simple vision signal of regenerative recording at institute's recording section end again.Then, by commutation circuit 71 the simple vision signal of regeneration is stored in SD frame memory 74.CPU36 code data readout time is stored in the memory 37 with the tracer signal of definite HDS signal and with it.
When the operator searched for, operator's operating operation panel 42 was so that device is in way of search.This makes commutation circuit 73 switch to b side contact, and simple vision signal is provided for the display unit (not shown), thereby demonstrates simple picture.The operator selects necessary picture by watching simple picture, for example, below simple picture, show corresponding time code, the operator is by selecting a width of cloth picture from guidance panel code 42 input time, CPU36 reads corresponding time code from memory 37, drive tapes 41 according to this time code by driver element 44, and this still frame of selecting by the operator of regeneration and output.
Processing (tightening the processing mode of color difference pixel in the horizontal direction) under second mode next will be described.This second mode is a record HDS signal on 4 road frames.
Fig. 6 is the key diagram of present embodiment, shows the cutting operation under second mode.
Under second mode, Y-signal is divided into 4 parts on panel.In other words, horizontal direction 1280 pixels * vertical direction 1024 pixels are divided into 2 districts of along continuous straight runs and vertical direction is divided into 2 districts.Because the A after cutting apart comprises horizontal direction 640 pixels * vertical direction 512 pixels to each district of D, and is similar to first mode, so be transformed into the pixel data of the Y-signal of a SD frame.Under second mode, the virtual data of value " 16 " is inserted into the zone corresponding to region R 3 (shown in Fig. 4 C).
On the other hand, color difference signal Cr and Cb are tightened half horizontal direction 320 pixels * vertical direction 1024 pixels to be provided and respectively to be divided into two (similar to Y-signal) and to be divided into 4 zones with vertical by level.By the divided area number of picture elements is horizontal direction 160 pixels * vertical direction 512 pixels.They are transformed into the color difference signal Cr of a SD frame and the pixel data of Cb, and this and first mode are similar.
As previously mentioned, under second mode, a HD frame is divided into 4 districts, promptly is transformed into the vision signal of 4 SD frames and offers VTR part 2 and be recorded on the tape 41.
Under second mode, be recorded on 4 road frames (40 road) corresponding to 4 SD frames of a HD frame.Be that number of repetition is 4.
Other aspects are identical with first mode.
In the present embodiment, select to write down SD signal or HDS signal, select the contact a or the contact b of commutation circuit 70 by the operator.When selecting record HDS signal, have only and when writing down simple vision signal as previously mentioned, just select contact c.Have again, select first mode or second mode, switch the commutation circuit 68C of recording processing circuit 68 by the operator.Then, in when record, be that SD signal record or the information of HDS signal record and indication are that first mode or the information of second mode are provided for CPU36 with indication, realize switching controls with part separately in VTR part 2.Have, in when regeneration, control circuit 43 judges that signals are that SD signal or HDS signal and it are first mode or second mode, and realizes the switching controls to commutation circuit 72 and 69C again.
Have, formed macro block, it is the unit of handling in VTR part 2, to comprise the virtual data of 2 Y-signals, shown in Fig. 5 A.Then, in comprising the DCT piece of identical Value Data, make all ac coefficients become " 0 ", thereby place value may be given other DCT pieces by the DCT computing.So, might record and regeneration under the situation that keeps high-quality HDS signal.
Have again, under second mode of present embodiment because the ratio that its Y and C pixel ratio are 2: 1 HDS signal is transformed into its Y and C number of picture elements be 4: 1 for record and regeneration, therefore can under the situation that video signal quality slightly descends, increase and write down number.
Have, for Y-signal, its HDS signal number of picture elements is not limited to horizontal direction 1280 pixels * vertical direction 1024 pixels again, but but usage level direction 1920 pixels * vertical direction 1036 pixels for example.Have again, also not necessarily a HD frame is divided into 8 or 4 parts equably, but for example horizontal direction 1920 pixels * vertical direction 1036 pixels can be divided into 12 or 6 parts.
Have, the virtual data value that is stored in the space segment of a SD frame is not limited to " 16 " or " 128 " again, also can be the identical value in the DCT piece scope, and the DCT piece is the unit (horizontal direction 8 pixels * vertical direction 8 pixels) of DCT computing here.
Have again, also needn't come splitting signal, but for example also can constitute the SD frame that per 8 pixels have different number of picture elements with respect to screen area.
Claims (10)
1. digital video signal recording device comprises:
Tape deck (21-27) is used for the digital video signal that record has first resolution on recording medium;
Subregion converting means (65,67) is used for coming the signal after the still frame video signal conversion Composition Region conversion with second resolution (being higher than first resolution) by the still frame vision signal being divided into n part (n is the natural number greater than 1); And
Auxiliary data generation device (43,36), be used to produce first auxiliary data of the described n value of indication and second auxiliary data of the described still frame vision signal frame size of indication, signal and described first and second auxiliary datas of described tape deck after the described subregion conversion of record on the described recording medium.
2. the digital video signal recording device described in claim 1, wherein said auxiliary data generation device further produces the 3rd auxiliary data, indicate the ratio of number of picture elements and the number of picture elements of the color difference signal of described still frame vision signal of the luminance signal of described still frame vision signal, described tape deck further is recorded in described the 3rd auxiliary data on the described recording medium.
3. the digital video signal recording device described in claim 1, wherein said tape deck comprises the video data compression device, it is by to comprising every signal that carries out after the subregion conversion is compressed in orthogonal transform of predetermined number of picture elements; Above-mentioned subregion converting means comprises:
Virtual data generation device (68a), being used for described is that the unit produces virtual data and it is joined by the still frame vision signal of subregion, to produce the signal after the subregion conversion; And
Converting means (43,65,67,68a), order of its response is removed to change the ratio of the virtual data number that produces described in signal one frame after the described subregion conversion and the described still frame video signal data of frame number and is changed described n value, described auxiliary data generation device produces the 4th auxiliary data and indicates described ratio, and described tape deck is recorded in the n and described the 4th auxiliary data that change on the described magnetizing mediums.
4. to show the digital video signal recording device described in 1 as right, wherein said subregion converting means is pressed the signal after the described subregion conversion of pre-determined number (greater than 1) output one frame, and described auxiliary data generation device produces the 3rd auxiliary data of the described pre-determined number of indication, and comprise a counting device and be used for counting exporting after the conversion of same frame subregion the number of times of signal, this auxiliary data generation device also produces the 4th auxiliary data and indicates this count value, and described tape deck is recorded in described third and fourth auxiliary data on the described recording medium.
5. the digital video signal recording device described in claim 1 also comprises:
Tighten the deflation vision signal that video signal generation circuit (68b) is used for having from described static drawing video signal generating described first resolution, thereby make the described vision signal of a frame corresponding to the described deflation vision signal of a frame, described tape deck by the signal record of first mode after described subregion on described tape, second mode of pressing the video signal recording of described deflation on described tape.
6. the digital video signal recording device described in claim 1, further comprise: simple video signal generating device (74), it has memory (75), be used for producing the video data that tightens from described still frame screen signal, the video data of described deflation is accumulated in the described memory, and come to have the simple vision signal of first resolution by the deflation vision signal that reads accumulation from described memory from static video signal generating, thereby make the image that comprises multiframe still frame vision signal in the image of the described simple vision signal of a frame, and be used to produce position data confirming the position of this multiframe on recording medium, and in described memory, accumulate position data.Described recording medium, and writes down simple vision signal and position signalling on the tape from memory as the 3rd auxiliary data in second mode on tape with the signal record of first mode after the subregion conversion.
7. the digital video signal recording device described in claim 1, wherein said tape deck has just responded a record stop signal and after the signal after stopping the record partitioning conversion at described tape deck, i.e. described simple vision signal of record and described position data on recording medium.
8. digital video signal regenerating unit comprises:
Regenerating unit (28-35) is used for the vision signal and the auxiliary data of regenerating and to have first resolution from recording medium, and described auxiliary data is about constitute the used data of a frame still frame vision signal from the multi-frame video signal;
Still frame video signal generating device (66,67,68) is used to produce described still frame vision signal, thereby constitutes a frame still frame vision signal according to auxiliary data from the described vision signal of multiframe.
9. the digital video signal regenerating unit described in claim 8 also comprises:
The auxiliary data that has memory (37) reads circuit (31,36), be used to read auxiliary data, these auxiliary datas indicate the position data that is recorded in the described still frame video signal frame on the recording medium in the described vision signal ending of record, and these auxiliary datas are stored in the described memory; And
Searcher (36), it responds a search command, according to the described still frame vision signal of auxiliary data removal search one frame in the described memory.
10. the digital video signal recording device described in claim 1, wherein said auxiliary data generation device also produces the 3rd auxiliary data, indication signal after does not have the subregion conversion of regeneration reverts in the regenerating unit of function of described first vision signal and uses a mask off command, with the signal after the subregion conversion that shields this regeneration.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98104337 CN1224304A (en) | 1998-01-20 | 1998-01-20 | Digital video signal recording apparatus and digital video signal reproducing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 98104337 CN1224304A (en) | 1998-01-20 | 1998-01-20 | Digital video signal recording apparatus and digital video signal reproducing apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440958C (en) * | 2002-07-08 | 2008-12-03 | 索尼株式会社 | Image data processing device and method |
| CN100459687C (en) * | 2004-10-06 | 2009-02-04 | 欧姆龙株式会社 | Moving picture recording apparatus and moving picture reproducing apparatus |
| CN101690163B (en) * | 2007-06-15 | 2012-02-08 | 索尼株式会社 | Shutter time compensation |
| CN102647558A (en) * | 2012-04-18 | 2012-08-22 | 深圳市联祥瑞实业有限公司 | Method and device for recording monitoring video |
-
1998
- 1998-01-20 CN CN 98104337 patent/CN1224304A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440958C (en) * | 2002-07-08 | 2008-12-03 | 索尼株式会社 | Image data processing device and method |
| CN100459687C (en) * | 2004-10-06 | 2009-02-04 | 欧姆龙株式会社 | Moving picture recording apparatus and moving picture reproducing apparatus |
| CN101690163B (en) * | 2007-06-15 | 2012-02-08 | 索尼株式会社 | Shutter time compensation |
| CN102647558A (en) * | 2012-04-18 | 2012-08-22 | 深圳市联祥瑞实业有限公司 | Method and device for recording monitoring video |
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