CN1725360A - Method and system for editing video and audio file - Google Patents
Method and system for editing video and audio file Download PDFInfo
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- CN1725360A CN1725360A CN 200410069912 CN200410069912A CN1725360A CN 1725360 A CN1725360 A CN 1725360A CN 200410069912 CN200410069912 CN 200410069912 CN 200410069912 A CN200410069912 A CN 200410069912A CN 1725360 A CN1725360 A CN 1725360A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
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- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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- Multimedia (AREA)
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- Business, Economics & Management (AREA)
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- Television Signal Processing For Recording (AREA)
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Abstract
This invention relates to a method for compiling video and audio files, which compiles input bit streams according to a duplicating task, said input bit stream to a duplicating task, said input bit stream has many video picture frames and multiple audio picture frames characterizing in taking a synchronous error list to calibrate the position relation between the video and audio picture frame first when carrying out the duplication task then to select the duplication to avoid the stream error accumulation and scatter when repeatedly compiling.
Description
Technical field
The present invention relates to a kind of system that edits the method for video/audio archive, be meant the method and system of a kind of stream mistake (Stream error) accumulation can effectively avoid repeating to edit the time and editor's video/audio archive of diffusion especially.
Background technology
MPEG (Motion Picture Experts Group) is that International Standards Organization (International StandardsOrganization, be called for short ISO) aims at the system that compressed digital video (video) and audio frequency (audio) are formulated.When bit stream (bit streams) when being encoded, the required minimum rule of observing during this system requirements coding is so that the recipient can clearly decipher the encoded bit stream of its reception.A bit stream roughly comprises a video component, an audio-frequency assembly and a system component.How each video and audio-frequency assembly that this system component defines in the single bit stream make up and synchronous information.Therefore, mpeg standard has defined the system that is used for compressed encoded video and audio bitstream.
Yet when one was duplicated audio-visual section (audiovisual segment) and duplicates audio-visual section and link with another, its audio frequency was difficult to synchronously.According to the type (type) of mpeg audio layer, each audio frequency picture frame may change dimensionally to some extent.Therefore, stationary problem is in part because rarely have man-to-man corresponding relation caused between audio frequency picture frame and video picture frame.So when picking out a video picture frame section when duplicating from archives, then identification video picture frame corresponding audio picture frame quantity will not be the numerical value of being scheduled to therewith.
Therefore, when a video section was replicated and is linked to another and duplicates section from archives, this audio-frequency assembly that duplicates section may be no longer synchronous with corresponding video picture frame.In case video and audio frequency picture frame are no longer synchronous, represent the mistake of video and audio frequency picture frame synchronous error can be introduced in the bit stream of last generation, this mistake can recently be represented with the quantity or the percentage of audio frequency picture frame.For instance, the timing error that is introduced into from two bit stream sections bindings may little part or big extremely several audio frequency picture frames to an audio frequency picture frame.
Though the mistake relevant with only linking two bit stream sections only is several audio frequency picture frames under specific circumstances, when most bit stream sections were bonded in a more complicated editing, each mistake that links section was understood and be accumulated.So the mistake of generation may be very huge, and generation audio frequency picture frame may serious asynchronously maybe can't be play.Moreover the audio frequency that asynchronous audio ﹠ video bit stream is generally produced at these section coupling positions can be discontinuous, for example, produces sonic boom (popping).Therefore, if discontinuous audio frequency is introduced in the bit stream section of binding, then can introducing make us uncomfortable sonic boom meeting.Like this, not only cause the audio bitstream that generates asynchronous, it is play the result and makes us being difficult to tolerance.
Therefore, United States Patent (USP) the 6th, 262 discloses a kind of method of synchronization editor video/audio archive commonly used for No. 777.The section quantity that no matter is bonded after the continuous compound rate operation how much, and the method can prevent the bit stream mistake to surpass half audio frequency picture frame, makes the video picture frame in fact synchronous with the audio frequency picture frame.
Referring to Fig. 1 (Figure 13 that No. the 6th, 262,777, corresponding United States Patent (USP)) the mark treatment scheme of conventional method when most audio ﹠ video sections are bonded is described, to guarantee that surpassing half audio frequency picture frame mistake can not produced.Generally the initial audio frequency picture frame 706,710,714,718 with each audio-visual section is called beginning label (tab-in) audio frequency picture frame, finishes audio frequency picture frame 708,712,716,720 and is called end mark (tab-out) audio frequency picture frame (as Fig. 2).Mark is handled and is performed at each beginning label tab-in and end mark tab-out audio frequency picture frame, and when meeting specified conditions, the audio frequency picture frame of beginning label tab-in and end mark tab-out may be abandoned or keep.Abbreviate beginning label audio frequency picture frame and end mark picture frame as mark hereinafter.The mark treatment scheme of Fig. 1 is described in conjunction with Fig. 2 and the example of one of Fig. 3 (Figure 14, the Figure 15 that No. the 6th, 262,777, corresponding United States Patent (USP)) for convenience of description.Be that preparation links together 4 section SEGMENT A, SEGMENT B, SEGMENT C, SEGMENT D in the example of Fig. 2.
At first, in step 602, before marks for treatment 706, judge existing existing stream wrong (existing stream error).As shown in Figure 2, section SEGMENT A is first section, does not introduce an existing stream mistake and there is previous mark, and therefore existing stream mistake is 0.In case judge that in step 602 existing stream mistake is at 0 o'clock, continue execution in step 604, with the marked erroneous (tab error) of judge mark 706.As Fig. 3, the marked erroneous of supposing mark 706 is 0.2 (refer to an audio frequency picture frame 20%).
Secondly, in step 606, judge existing stream wrong with marked erroneous addition (referred to herein as cumulative error) after whether greater than half picture frame (as 0.5).If be judged as when being in the step 606, execution in step 610 is to abandon the mark that abovementioned steps 604 is handled.Otherwise if step 606 is judged as when denying, execution in step 610 is to keep the mark that abovementioned steps 604 is handled.Step 608 finishes back execution in step 612 with step 610.In step 606, because the cumulative error of mark 706 is 0.2 less than 0.5, so execution in step 608, with retention marker 706.
Then, in step 612, judged whether other mark.If step 612 has been judged as, return step 603.If step 612 is judged as nothing, the end mark treatment scheme.In this example, abovementioned steps is marks for treatment 706 only, so step 612 can be judged as and returns step 602.
The existing stream mistake of marker for determination 708 is 0.2 in step 602, and in step 604 marked erroneous 0.5 of marker for determination 708, can abandon mark 708 because the cumulative error of mark 708 be 0.7 to go to step 610 in step 606 thereafter.After mark 708 is abandoned, newly flows mistake and become-0.3 (0.7-1=-0.3).Then repeated execution of steps 602 to 612, continuing marks for treatment 710,712,714,716,718 and 720, until underlined all processed till.After mark is handled, all section SEGMENT A, SEGMENT B, SEGMENT C, SEGMENTD can be linked together.
Utilize aforementioned mark treatment scheme in this conventional method, make existing stream mistake be no more than 0.5 audio frequency picture frame,, all can allow the video picture frame in fact synchronous with the audio frequency picture frame no matter so how much quantity that is bonded when replicate run has.Yet, though error accumulation when conventional method can effectively be prevented audio-visual section single editor, if repeat to edit growth and the diffusion that these audio-visual sections through editor still are difficult to avoid the cumulative flow mistake.
For instance, will be linked to another audio-visual section X as the original audio-visual section s of Fig. 4.According to conventional method, grow up for avoiding the cumulative flow mistake, a abandons with the audio frequency picture frame, and the stream mistake that hypothesis exists now is-0.5 audio frequency picture frame.Therefore, as shown in Figure 5, will be linked to audio-visual section X through the audio-visual section s that mark is handled, all audio frequency picture frames can be from b 0.5 the audio frequency picture frame that begins to move to left, to form a new audio-visual section s '.
Secondly, beginning is editor for the second time, will be from audio-visual section s ' intercepting one the audio-visual section from 2 beginnings of video picture frame to be linked to another audio-visual section Y.When mark was handled, audio frequency picture frame d can be abandoned from the audio-visual section of audio-visual section s ' intercepting, and to set the stream mistake that exists now be-0.5 audio frequency picture frame.As shown in Figure 6, in the time of will intercepting audio-visual section and be linked to audio-visual section Y, all audio frequency picture frames can be from audio frequency picture frame e 0.5 the audio frequency picture frame that begins to move to left, to form a new audio-visual section s ".Therefore, the mistake of the audio-visual section after repeating to edit becomes an audio frequency picture frame, |-0.5-0.5|=1.
And then, editor once more is with from audio-visual section s " in the audio-visual section that begins from video picture frame 3 of intercepting one, to be linked to another audio-visual section Z.When from audio-visual section S " in the audio-visual section of intercepting when mark is handled, audio frequency picture frame g can be abandoned and suppose that present stream mistake is-0.5.As shown in Figure 7, in the time of will being linked to audio-visual section Z through the audio-visual section that mark is handled, all audio frequency picture frames can be from audio frequency picture frame h 0.5 the audio-visual picture frame that begins to move to left, to form a new audio-visual section s .Therefore, be 1.5 through three editor institute cumulative flow mistakes, |-0.5-0.5-0.5|=1.5.
If carry out editor the 4th time, the audio-visual section that intercepting one begins from video picture frame 4 in audio-visual section s , and when mark was handled, it was-0.5 that audio frequency picture frame j can be abandoned and set present stream mistake.As Fig. 8, when treated audio-visual section was linked to another audio-visual section V, whole audio frequency picture frame was from 5 0.5 the audio-visual picture frame that begins to move to left, to form a new audio-visual section s " ".So, edit the stream mistake of being accumulated through four times and increase to 2, |-0.5-0.5-0.5-0.5|=2.For example, the audio frequency picture frame of video picture frame 5 belows of inedited audio-visual section s is 3 audio frequency picture frames 5, yet, through four times editor after, video/audio archive s " " 3 audio frequency picture frames 5 in 2 moved to left to the below of video picture frame 4.
According to as can be known aforementioned, conventional method still is difficult to suppress to flow wrong growth and diffusion when repeating to edit, and the audio-frequency assembly in the bit stream that causes repeating to edit may be no longer synchronous with suitable video component.
Summary of the invention
In view of prior art can't avoid flowing error accumulation when repeating to edit, therefore the present inventor considers if the audio frequency picture frame displacement can note down binding the time, and when repeating to edit, position when according to the audio frequency picture frame displacement of noting down the audio frequency picture frame being reverted back to previous the binding earlier, carrying out mark again handles and binding, the stream error accumulation in the time of then can avoiding repeating to edit.
Therefore, the purpose of this invention is to provide a kind of when effectively avoiding repeating to edit the stream error accumulation and the video/audio archive editor's of diffusion method and system.
According to the method for editor's video/audio archive of the present invention, handle incoming bit stream according to replication task, this incoming bit stream has a plurality of video picture frames and a plurality of audio frequency picture frame, and the method includes the steps of:
A) according to this replication task to identify start symbol video picture frame in this a plurality of video picture frames certainly and to finish mark video picture frame;
B) when judging the timing error table corresponding and exist with this incoming bit stream, proofread and correct position relation between these video picture frames and these audio frequency picture frames according to this timing error table, this timing error table is noted down the stream mistake of these a plurality of audio frequency picture frames;
C) from these a plurality of audio frequency picture frames, identify beginning label audio frequency picture frame relevant and the end mark audio frequency picture frame relevant with this end mark video picture frame with this start symbol video picture frame; And
D) duplicate an audio-visual section from this incoming bit stream, this audio-visual section contains a plurality of video picture frames and a plurality of audio frequency picture frames between this beginning label audio frequency picture frame and this end mark audio frequency picture frame between this start symbol video picture frame and this end mark video picture frame.
Effect of the present invention can utilize the timing error table to come between correcting video and audio frequency picture frame the position relation, carries out mark again and handles and link, to reach the effect of stream error accumulation and diffusion when effectively avoiding repeating to edit.
Description of drawings
Fig. 1 is a United States Patent (USP) the 6th, 262, the process flow diagram that the mark in No. 777 is handled;
Fig. 2 is according to United States Patent (USP) the 6th, 262, the synoptic diagram of the example that No. 777 method links together a plurality of audio-visual sections;
Fig. 3 is the table of the result of calculation of a plurality of marks processing in the displayed map 2;
Fig. 4 to Fig. 8 is according to United States Patent (USP) the 6th, 262, the synoptic diagram of the audio-visual section when No. 777 method repeats to edit audio-visual section;
Fig. 9 is the synoptic diagram according to the preferred embodiment of the system of editor's video/audio archive of the present invention;
Figure 10 is the synoptic diagram according to a bit stream of the present invention;
Figure 11 is the process flow diagram according to the preferred embodiment of the method for editor's video/audio archive of the present invention;
Figure 12 is the process flow diagram of the replicate run among Figure 11;
Figure 13 is the synoptic diagram of one of bit stream of cutting according to Figure 12 of the bit stream of Figure 10;
Figure 14 is the synoptic diagram that duplicates according to the audio-visual section of the replicate run among Figure 12;
Figure 15 is the process flow diagram that the mark among Figure 11 is handled;
Figure 16 is the synoptic diagram that in the mark of present embodiment is handled several audio-visual sections is linked together; And
Figure 17 to 22 is the synoptic diagram that repeat to edit audio-visual section according to the present invention.
Embodiment
By below in conjunction with in the DETAILED DESCRIPTION OF THE PREFERRED with reference to the accompanying drawings, can be expressly understood above-mentioned and other technology contents, characteristics and function of the present invention.
As shown in Figure 9, the system in order to editor's video/audio archive mainly has editing engine 11 and the medium 12 such as hard disk that is used to carry out the video/audio archive editor among the present invention.Editing engine 11 is in order to edit one or more incoming bit streams.For ease of explanation, this routine inediting engine 11 is that example illustrates to edit two incoming bit stream A.MPEG, B.MPEG.It should be appreciated by those skilled in the art that editing engine 11 also can edit one or more incoming bit stream, be not limited to the disclosed content of present embodiment.As shown in figure 10, usually, bit stream 13 has video bit stream 131 and audio bitstream 132.Video bit stream 131 has a plurality of video picture frames, and each video picture frame has exclusive sequence number.Audio bitstream 132 has a plurality of audio frequency picture frames.Medium 12 storage editor tables 121, a plurality of replication task of record in this editor's table 121 by operator's input.Each replication task content contains incoming bit stream, the beginning sequence number of appointment and finishes sequence number, as COPY 10 ... 25A.MPEG.Medium 12 usefulness are for editing engine 11 access data.
Secondly, come the operation of the editing engine 11 in the brief description present embodiment earlier in conjunction with Figure 11.Be noted that at first the editor's video/audio archive system in the present embodiment is an open system, and receive aforementioned incoming bit stream, and export the output bit flow that editor finishes to the external world from extraneous.Therefore, in step 21, editor's table 121 that editing engine 11 receives by operator's input, and editor's table 121 is temporary in the medium 12.Secondly, in step 22, editing engine 11 produces a brand-new timing error table 122, uses for subsequent treatment.Then, in step 23, editing engine 11 is each replication task in executive editor's table 121 in regular turn, with replicate run 111 of corresponding generation respectively such as an object (object), decide the audio frequency picture frame quantity of duplicating, indication contains the audio frequency picture frame quantity of beginning label tab-in and end mark tab-out, producing an audio-visual section, and then the formation output bit flow.When audio-visual section is exported, need make first audio frequency picture frame (referring to beginning label tab-in audio frequency picture frame) first video picture frame that aligns (referring to start symbol MARK-IN video picture frame) in the audio-visual section, then need to carry out the mark processing and upgrade timing error table 122.At last, execution in step 24 is inserted into timing error table 122 in the output bit flow.In the present embodiment, timing error table 122 is in order to the stream mistake of the audio frequency picture frame of record after mark is handled.
Therefore, the work carried out of the replicate run that produced of editing engine 11 111 roughly comprises to duplicate with mark and handles.Hereinafter, come the workflow of the replicate run in the specifically bright step 23 earlier in conjunction with Figure 12.
At first in step 31, replicate run 111 begins sequence number according to appointment in the replication task respectively and comes selected mark MARK-IN position at the beginning and end mark MARK-OUT position from video bit stream 131 with the end sequence number, mark video picture frame and one finishes mark video picture frame to discern at the beginning, and then decision is with the video picture frame quantity (referring to be positioned at the video picture frame between start symbol MARK-IN and end mark MARK-OUT) that is replicated.For instance, as shown in figure 10, be 10 and to finish sequence number be 25 o'clock if specify the beginning sequence number, start symbol MARK-IN position is that video picture frame 10 is a video picture frame 25 with finishing mark MARK-OUT position.Thereby video picture frame 10 be start symbol video picture frame and video picture frame 25 for finishing mark video picture frame, the section that is replicated is comprised video picture frame 10 to video picture frame 25.Certainly, also will comprise the audio frequency picture frame relevant with the video picture frame with being replicated audio-visual section, these audio frequency picture frames are horizontal under the associated video picture frame.
For fear of through edited stream error accumulation, therefore in the present embodiment, can to utilize timing error table 122 to note down stream behind editor wrong and this timing error table 122 inserted appropriate location (step 24 as described above) in bit stream when audio-visual picture frame, in the system component in bit stream or the position the gauge outfit of audio-visual section is as PES_private_date among the PES_header.
Therefore, in step 32, can judge whether a synchronous error list is present in the incoming bit stream earlier.If step 32 has been judged as, mean that then this incoming bit stream was before once edited, as incoming bit stream A.MPEG, and have the stream mistake between audio bitstream 132 and the video bit stream 131, therefore first execution in step 33.If step 32 is judged as nothing, mean this incoming bit stream before through editor, as incoming bit stream B.MPEG, execution in step 36 without leave then.
In step 33, replicate run 111 loads the timing error table that is present in the incoming bit stream earlier, and this timing error table is different from the timing error table 122 that previous steps 22 produces.The sequence number of the audio frequency picture frame of displacement and the stream mistake after its displacement when the timing error table in this example can be put down in writing first pre-editing.In this example in order to reduce the audio frequency picture frame quantity of putting down in writing in the timing error table, therefore only be recited as the audio frequency picture frame of mark audio frequency picture frame, because a chosen editor's audio frequency section is to begin whole audio zone section from mark audio frequency picture frame to move, the displacement of each the audio frequency picture frame in the whole audio frequency section like this can be consistent, thereby only need put down in writing mark audio frequency picture frame and get final product.
Moreover, if the timing error table exists, mean that then this audio-visual bit stream 13 is edited, and may be to link by a plurality of audio-visual sections, make the timing error souvenir carry many audio frequency picture frames and corresponding stream mistake.For guaranteeing correctly to proofread and correct the position relation of video and audio frequency picture frame in the incoming bit stream, therefore in step 34, the sequence number of the audio frequency picture frame that carries according to the timing error souvenir is separated 131 one-tenth several sub audio-visual sections of video bit stream, and audio-visual bit stream 13 is carried out cutting in the audio frequency picture frame position that the timing error souvenir carries.When cutting, the video picture frame that order is positioned at the audio frequency picture frame top of being put down in writing separates with the previous video picture frame, to form sub audio-visual section.If there are two video picture frames audio frequency picture frame top, then make these two video picture frames separate.When cutting, replicate run 111 is selected a relevant calibration marker audio frequency picture frame respectively according to the two adjacent video picture frames that are cut out simultaneously.
The two adjacent video picture frames that are cut out be meant be positioned at the audio frequency picture frame top that is documented in the timing error table the video picture frame therewith the video picture frame the previous video picture frame or be positioned at two video picture frames of the audio frequency picture frame top of being put down in writing.Equally, because the length of audio frequency section preferably surpasses or equals the length of video section.If be positioned at the video picture frame of time early, the concluding time of then selecteed audio frequency picture frame must equal or be later than the concluding time of the video picture frame of time early.If be positioned at the video picture frame of later time, the start time of selecteed audio frequency picture frame must equal or early than start time of the video picture frame of later time.Certainly, in order to reach this demand, the audio frequency picture frame that then is positioned at the cutting position below then may be remake, so that two video picture frames all have this audio frequency picture frame.
Then, in step 35, proofread and correct the relation of the position between video and audio frequency picture frame in each sub audio-visual section respectively according to the stream mistake of each audio frequency picture frame correspondence respectively.After step 35 finishes, go back execution in step 36.
For instance, if in step 33, the timing error table such as the following table 1 of the incoming bit stream that loads, then in step 34, as shown in figure 13, owing to be positioned at audio frequency picture frame 134 tops and be video picture frame 9 and to be positioned at audio frequency picture frame 135 tops are video picture frames 19,20, replicate run 111 can with audio-visual bit stream 13 from video picture frame 8 with 9 and video picture frame 19 cut with 20 execution, to form three audio-visual sections 136,137,138 of son.In order to allow section sound intermediate frequency section length be not less than the video area segment length, the audio frequency picture frame as calibration marker audio frequency picture frame of starting position is the audio frequency picture frame 139 before audio frequency picture frame 134 in the sub audio-visual section 136; Audio frequency picture frame in the audio-visual section 136 of son in the end position is the audio frequency picture frame 135 of recasting; The audio frequency picture frame of starting position also is an audio frequency picture frame 135 in the audio-visual section 138 of son.So, in this example, audio frequency picture frame 135 is remake.
| Table 1 | |
| Mark audio frequency picture frame | The |
| 134 | 0.3 |
| 135 | -0.2 |
Secondly, in step 35, proofread and correct video in each sub audio-visual section 137,138 according to the stream mistake of each audio frequency picture frame 134,135 correspondence respectively and concern with position between the audio frequency picture frame.Specifically, first audio-visual section 136 of son there is no corresponding error message thereby keep its video and the audio frequency picture frame between relation; The stream mistake of first audio frequency picture frame 134 of second audio-visual section 137 sound intermediate frequency bit stream of son is 0.3 audio frequency picture frame, therefore make audio bitstream integral body in the sub audio-visual section 137 0.3 audio frequency picture frame that moves to left, the stream mistake that this video and audio fragment 137 is caused when eliminating first pre-editing; Stream mistake as for the 3rd sub audio-visual section 138 sound intermediate frequency picture frames 135 is-0.2 audio frequency picture frame, thereby makes the sub audio-visual section 138 sound intermediate frequency bit stream integral body 0.2 audio frequency picture frame that moves to right, and concerns with the position between correcting video and audio frequency picture frame.So, come position relation between correcting video picture frame and audio frequency picture frame by the stream error message in the timing error table in the incoming bit stream in to 35, the audio frequency picture frame had been reverted to previous through editor's position in step 33.
Then, in step 36, select mark (tab-in) audio frequency picture frame and an end mark (tab-out) audio frequency picture frame at the beginning according to start symbol video picture frame and end position video picture frame, with decision will duplicate the size of audio frequency section.Because the length of duplicating the audio frequency section preferably surpasses or equals the length of replicating video section, as shown in figure 14, preferably equal or early than start time 141 of start symbol video picture frame 10 as start time of the beginning label audio frequency picture frame of initial audio frequency picture frame 143, preferably equal with start time or more early than the concluding time 142 that finishes mark picture frame 25 as the end mark audio frequency picture frame that finishes audio frequency picture frame 144.In brief, if an audio frequency picture frame can not align 141 o'clock start times of start symbol video picture frame 10 or 142 o'clock concluding times of end mark video picture frame 25, then beginning label audio frequency picture frame 143 has start time early than start time 141 of start symbol video picture frame 10, and end mark audio frequency picture frame 144 has early start time than the concluding time 142 that finishes mark video picture frame 25.
At last, in step 37, will contain selected audio-visual section (referring to contain selected video picture frame 10-25 and audio frequency picture frame 143-144) and after mark is handled (being detailed later), export output bit flow to.When these replicate run 111 execution of step 37, then replicate run 111 has not existed.So, utilize the timing error table that has incoming bit stream, eliminate the stream mistake that previous editor produces in advance, effectively avoid flowing mistake because of repeating to edit the effect of accumulating to reach with the relation of the position between first correcting video and audio frequency picture frame.
It should be noted, though in the present embodiment, (as step 32 to 35) handled in the existence of timing error table whether judgement with corresponding position correction be to begin to carry out behind the video picture frame section that will be replicated selected (as step 31), yet it will be recognized by those skilled in the art that whether the existence that also can carry out the timing error table is earlier judged to handle to carry out with corresponding position correction again selects the video picture frame section that duplicates.In addition, the operation of the selection calibration marker audio frequency picture frame of step 34 also can be in step 36 be carried out when selecting the audio frequency picture frame in the lump, is not limited to the situation that present embodiment discloses.
Then, editing engine 11 can produce a new replicate run 111, to carry out next replication task again according to the next replication task of editor's table 121.
Moreover, when replication task is carried out in replicate run 111, then can finish in the audio-visual section output back of duplicating, carry out next replication task with the replicate run 111 that continues to produce by editing engine 11, if when the audio-visual section of ensuing replication task need link with the audio-visual section of previous replication task, the stream mistake that will consider previous audio-visual section when then next the audio-visual section of replicate run generation carries out the mark processing was carried out the mark processing.Thereby, hereinafter, illustrating that in conjunction with the example of Figure 15 and Figure 16 the mark that step 37 is mentioned in the aforementioned copy operation handles, the mark in the present embodiment is handled.Hypothesis has four sub audio-visual sections 15 in the example of Figure 16,16,17,18, the audio-visual section 15 of its neutron, 16 belong to because of the audio-visual section of duplicating of the replicate run first time, the audio-visual section 17 of son, 18 also belong to the audio-visual section that duplicates of replicate run for the second time, the audio-visual section 15 of son, 17 all begin to have mark audio frequency picture frame (hereinafter to be referred as mark) 151 at the beginning respectively with end at the audio frequency section, 171 and one calibration marker audio frequency picture frame (hereinafter to be referred as mark) 152,172, sub audio-visual section 16, audio frequency section in 18 also all begins to have a calibration marker audio frequency picture frame 161 respectively with end at it, 181 and one end mark audio frequency picture frame 162,182 (hereinafter to be referred as marks).
At first, in step 41, judge the existing stream wrong (existing streamerror) of present mark 151 earlier.As shown in figure 15, mark audio frequency picture frame 151 belongs to first section 15 at present, does not introduce existing stream mistake and there is previous mark, and therefore existing stream mistake is 0.
Secondly, in step 42, the marked erroneous of marker for determination 151 (tab error).In this example, the marked erroneous of supposing mark 151 is 0.3.
Secondly, in step 43, judge existing stream wrong with marked erroneous addition (claiming cumulative error) at this after whether greater than half picture frame (as 0.5).If in the judged result of step 43 for being that then execution in step 45, to be discarded in the mark 151 that abovementioned steps 42 is handled.Otherwise, if in the judged result of step 43 for not, then execution in step 44, to keep the mark 151 that abovementioned steps 42 is handled.According to this example, in step 43, because the cumulative error of mark 151 is 0.3, less than 0.5, so execution in step 44, with retention marker 151.In addition, the cumulative error with this mark 151 is called new stream mistake again.After step 44 is finished with step 44, execution in step 46.
In step 46, be recorded in the timing error table 122 that produces in the abovementioned steps 22 the new stream of mark 151 is wrong, to upgrade timing error table 122.In this example, given as following table 2, the new stream mistake of putting down in writing mark 151 is documented in the timing error table 122.In addition because when linking, be positioned at same audio-visual section be positioned at beginning can be identical with the displacement (referring to that stream is wrong) of two marks of end position, therefore only need note down in two marks at least one and can reply the intersegmental position of audio frequency section and video area and concern.In the present embodiment, select to note down the stream mistake of the mark 151 that is arranged in beginning at timing error table 122.Every recorded stream mistake accounts for 4～6 bytes (bytes).
| Table 2 | |
| Mark audio frequency picture frame | The stream mistake |
| 151 | 0.3 |
| 161 | 0.1 |
| 171 | -0.2 |
| 181 | 0.2 |
Secondly, in step 47, judged whether other mark.If the judged result of step 47 for having, is then returned step 41.If the judged result of step 47 is nothing, then end mark treatment scheme.In this example, abovementioned steps is marks for treatment 151 only, and therefore, step 47 can be judged as and return step 41.
The existing stream mistake of marker for determination 152 is 0.3 in step 41, and in step 42 marked erroneous 0.5 of marker for determination 152, can abandon mark 152 because the cumulative error of mark 152 be 0.8 to skip to step 45 in step thereafter.After mark 152 is abandoned, newly flows mistake and become-0.2 (0.8-1=-0.2).
Secondly, in step 47,, therefore do not upgrade timing error table 122, continue execution in step 47, to continue to judge next mark 161 because mark 152 is the marks at the section end position.Then, repeated execution of steps 41 to 47 is till handling all marks.In addition, when handling the mark 161 of second section 16, the existing stream mistake of mark 161 is-0.2 in step 41, and the marked erroneous that is set in marker for determination 161 in the step 42 is 0.3, because of the cumulative error of mark 161 is 0.1, mark 161 can keep, and cumulative error (referring to that new stream is wrong) 0.1 that can record mark 161 in step 46 is in timing error table 122 (as above table 2); Similarly, the mark 171,181 in the starting position also can be documented in the timing error table 122 in third and fourth section 17,18.
At last, after finishing the mark processing, all sub audio- visual sections 15,16,17,18 can be linked together.So, when mark is handled, upgrade timing error table 122 synchronously, so that each sub audio- visual section 15,16,17, the displacement (refer to stream wrong) of 18 sound intermediate frequency picture frames when linking is recorded in the timing error table 122, then after will handling, editing engine 11 require bit stream (as the audio-visual section 15 of the son that links, 16,17, when 18) exporting, more timing error table 122 can be inserted in the output bit flow (as step 24 among Figure 11), when this bit stream is edited once more, can come the relation between audio calibration and video picture frame to carry out editing again with the error flow information in the timing error table 122 earlier, effectively to avoid flowing error accumulation and diffusion.
It should be noted that replicate run 111 can export it to output bit flow when handling the audio-visual section that produces in response to replication task.With regard to the example of aforementioned Figure 16, sub audio- visual section 15,16 promptly can export output bit flow to after mark is handled, and sub audio- visual section 17,18 just exports output bit flow to after mark is handled in replicate run next time.
Below illustrate present embodiment and how can prevent the fluid stopping error accumulation.At first, will be linked to another audio-visual section X as the original audio-visual section 19 of Figure 17.For avoiding the cumulative flow mistake to increase, a abandons with the audio frequency picture frame, and the stream mistake that hypothesis exists now is-0.5 audio frequency picture frame.Therefore, as shown in figure 18, will be linked to audio-visual section X through the audio-visual section 19 that mark is handled, all audio frequency picture frames can be from b 0.5 the audio frequency picture frame that begins to move to left, to form a new audio-visual section 19 '.Simultaneously, the displacement (referring to that stream is wrong)-0.5 of audio frequency picture frame b can be documented in the timing error table 122, as b-0.5, and before the bit stream output that contains audio-visual section 19 ', editing engine 11 can be inserted timing error table 122 in this bit stream.
Secondly, beginning is editor for the second time, will be from audio-visual section s ' intercepting one the audio-visual section from 2 beginnings of video picture frame to be linked to another audio-visual section Y.Decision among the audio-visual section s ' duplicate section the time, as Figure 19, can load the timing error table that is present in the bit stream earlier, come position relation between audio calibration and video to utilize the stream error message, select the audio-visual section of intercepting again.Then, to intercept audio-visual section when mark is handled, audio frequency picture frame c can be abandoned, and the stream mistake of setting existence now is 0.4 audio frequency picture frame, as shown in figure 20, in the time of will intercepting audio-visual section and be linked to audio-visual section Y, all audio frequency picture frames can be from audio frequency picture frame d 0.4 the audio frequency picture frame that begins to move to right, to form a new audio-visual section 19 "; and the stream mistake of noting down audio frequency picture frame d in timing error table 122 and with timing error table 122, insert contain audio-visual section 19 " bit stream in, with together with audio-visual section 19 " output.At this, be different from the accumulation of conventional stream mistake, in this example since the stream error message remain in the bit stream with proofread and correct in the position correction action, make that through twice editor's stream mistake be not that twice editor added up to flow mistake for editing and his like mistake for the second time only.
Similarly, if edit for the third time again, with from audio-visual section 19 " in the audio-visual section that begins from video picture frame 3 of intercepting one, to be linked to another audio-visual section Z.Same, when from audio-visual section 17 " in the audio-visual section of intercepting, as shown in figure 21, can will utilize the position relation between timing error table audio calibration and video picture frame earlier; then when carrying out the mark processing, can keep audio frequency picture frame f and suppose that present stream mistake is 0.4.As shown in figure 22, in the time of will being linked to audio-visual section Z through the audio-visual section that mark is handled, all audio frequency picture frames can be from audio frequency picture frame f 0.4 the audio-visual picture frame that begins to move to right, to form new audio-visual section 19 , and the stream mistake of record audio picture frame f is in timing error table 122, and when new audio-visual section 19 of output timing error table 122 exported together.Therefore, only be 0.4 and can not accumulate through three editors' the stream mistake of audio-visual section 19 .
It should be noted, make the timing error epi-position in bit stream, so that link up with the external world though previous embodiment inediting video/audio archive system is an open system; Yet, those skilled in the art will be appreciated that, when if editor's video/audio archive system is a closed system, then the timing error table can be stored in the medium 12, and when the video/audio archive editor, only need timing error table 122 in the load store medium 12 to come position relation between correcting video and audio frequency picture frame, mark also can directly upgrade the timing error table 122 in medium 12 when handling, make different with previous embodiment, in sealing video/audio archive editing system, timing error table 122 there is no necessity of inserting in the bit stream.
Described before combining, to utilize timing error table 122 to put down in writing the stream error message among the present invention, so that when it is edited once more, the position relation that can utilize the stream error message to go ahead of the rest between audio calibration and video picture frame is edited again, and also can be embedded in the timing error table of new generation behind the editor with newly flowing error message, insert through editor's output bit flow or be stored in the medium 12 with the timing error table that record is had new stream error message, with reach effectively avoid flowing wrong because of repeating to edit the effect of accumulating and spreading.
Described above only is the preferred embodiments of the present invention, rather than limits practical range of the present invention with this, and the simple equivalent of being done in the application's scope and description of the invention content changes and modifies, and all should still belong in the scope that patent of the present invention contains.
The drawing reference numeral explanation
11 editing engine
111 copy operations
A.MPEG, B.MPEG incoming bit stream
12 Storage Medias
121 editor's tables
122 timing error tables
123 audio-visual sections
13 bit streams
131 image bit streams
132 audio bitstreams
136,137,138,15,16,17,18 sub audio-visual sections
10,25,19,20 image frames
The time started of 141 video picture frames 10
The concluding time of 142 video picture frames 25
134,135,139,143,145,144,146 audio frequency picture frames
The Mark-In start symbol
Mark-Out finishes mark
21～24,31～37,41～47 steps
19,19 ', 19 ", the audio-visual section of 19
151,152,161,162,171,172,181,182 marks
Claims (19)
1. method of editing video/audio archive, in order to handle incoming bit stream according to replication task, this incoming bit stream has a plurality of video picture frames and a plurality of audio frequency picture frame, and the method includes the steps of:
A) finish mark video picture frame according to this replication task from these a plurality of video picture frames, to identify a start symbol video picture frame and one;
B) when judging the timing error table corresponding and exist with this incoming bit stream, proofread and correct position relation between these video picture frames and these audio frequency picture frames according to this timing error table, this timing error table is noted down these audio frequency picture frames and his like mistake;
C) from these a plurality of audio frequency picture frames, identify beginning label audio frequency picture frame relevant and the end mark audio frequency picture frame relevant with this end mark video picture frame with this start symbol video picture frame; With
D) duplicate an audio-visual section from this incoming bit stream, this audio-visual section contains a plurality of video picture frames and a plurality of audio frequency picture frames between this beginning label audio frequency picture frame and this end mark audio frequency picture frame between this start symbol video picture frame and this end mark video picture frame.
2. method according to claim 1, wherein, at described step B) in, the stream mistake of at least one each the audio frequency picture frame in this timing error table in these a plurality of audio frequency picture frames of record.
3. method according to claim 1 and 2, wherein, at described step B) in, come these a plurality of audio frequency picture frames of displacement according to the stream mistake in this timing error table, to proofread and correct the position relation between these a plurality of video picture frames and this a plurality of audio frequency picture frames.
4. method according to claim 2, wherein, at described step B) in, when if this timing error table exists, the position that correspondence is documented in this at least one the audio frequency picture frame in this timing error table cuts into the audio-visual section of a plurality of sons with this incoming bit stream, proofreaies and correct the relation between the video and audio frequency picture frame in the corresponding sub audio-visual section according to the stream mistake of this at least one audio frequency picture frame again.
5. method according to claim 4 is wherein, at described step B) in, when this incoming bit stream is cut into the audio-visual section of these a plurality of sons, make that the audio zone segment length of each is not less than the video area segment length in the audio-visual section of these a plurality of sons.
6. method according to claim 1 also comprises step e), be recorded in this timing error table with the stream mistake of carrying out that mark is handled and will this audio-visual section.
7. method according to claim 1, wherein, at described step B) in, when described timing error table existed, this timing error epi-position was in this incoming bit stream.
8. method according to claim 6 is wherein, in described step e) in, with this timing error table insert one contain the output bit flow of the audio-visual section that this process mark handles after, begin this output bit flow is exported.
9. system that edits video/audio archive, in order to handle incoming bit stream according to replication task, this incoming bit stream has a plurality of video picture frames and a plurality of audio frequency picture frame, and described system comprises:
Editing engine is used for this incoming bit stream according to this replication task editor; And
Medium is used for for this editing engine access data;
Wherein, according to this replication task, this editing engine is when judging a timing error table corresponding with this incoming bit stream and exist, the position of proofreading and correct between these a plurality of video picture frames and this a plurality of audio frequency picture frames according to this timing error table concerns, and identify start symbol video picture frame and finish mark video picture frame and identify beginning label audio frequency picture frame relevant and the end mark audio frequency picture frame relevant in these a plurality of audio frequency picture frames certainly in these a plurality of video picture frames certainly with this end mark video picture frame with this start symbol video picture frame, duplicate an audio-visual section, this audio-visual section contains a plurality of video picture frames and the plural audio frequency picture frame between this beginning label audio frequency picture frame and this end mark audio frequency picture frame between this start symbol video picture frame and this end mark video picture frame.
10. system according to claim 9, wherein, the stream mistake of at least one the audio frequency picture frame in this timing error table in these a plurality of audio frequency picture frames of record.
11. according to claim 9 and 10 described systems, wherein, this editing engine is come these a plurality of audio frequency picture frames of displacement according to the stream mistake in this timing error table, to proofread and correct the position relation between these a plurality of video picture frames and this a plurality of audio frequency picture frames.
12. system according to claim 10, wherein, when this timing error table exists, the position that this editing engine correspondence is recorded in this at least one the audio frequency picture frame in this timing error table cuts into the audio-visual section of a plurality of sons with this incoming bit stream, proofreaies and correct the relation between the video and audio frequency picture frame in the corresponding sub audio-visual section according to the stream mistake of this at least one audio frequency picture frame again.
13. system according to claim 12, wherein, when this incoming bit stream was cut into the audio-visual section of these a plurality of sons, this editing engine made that this audio zone segment length of each is not less than this video area segment length in the audio-visual section of this son.
14. the stream mistake that system according to claim 9, this editing engine carry out also that mark is handled and will this audio-visual section is documented in this timing error table.
15. system according to claim 14, wherein, when this system was an open system, this timing error epi-position was in this incoming bit stream.
16. system according to claim 9, wherein, when this system was a closed system, this timing error epi-position was in this medium.
17. system according to claim 15, wherein, this editing engine begins this output bit flow output after this timing error table is inserted the output bit flow of the audio-visual section that contains this process mark processing.
18. system according to claim 9, wherein, this editing engine is to should replicate run of replication task generation carrying out the work that this duplicates audio-visual section.
19. one kind is used to make electronic installation to carry out the computer program of video/audio archive edit step, this electronic installation is used for handling incoming bit stream according to replication task, this incoming bit stream has a plurality of video picture frames and a plurality of audio frequency picture frame, and described video/audio archive edit step comprises:
A) finish mark video picture frame according to this replication task from these a plurality of video picture frames, to identify a start symbol video picture frame and one;
B) when judging the timing error table corresponding and exist with this incoming bit stream, proofread and correct position relation between these a plurality of video picture frames and this a plurality of audio frequency picture frames according to this timing error table, this timing error table is noted down the stream mistake of these a plurality of audio frequency picture frames;
C) from these a plurality of audio frequency picture frames, identify beginning label audio frequency picture frame relevant and the end mark audio frequency picture frame relevant with this end mark video picture frame with this start symbol video picture frame; With
D) duplicate an audio-visual section from this incoming bit stream, this audio-visual section contains a plurality of video picture frames and a plurality of audio frequency picture frames between this beginning label audio frequency picture frame and this end mark audio frequency picture frame between this start symbol video picture frame and this end mark video picture frame.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410069912 CN1725360A (en) | 2004-07-19 | 2004-07-19 | Method and system for editing video and audio file |
| PCT/JP2005/013540 WO2006009275A1 (en) | 2004-07-19 | 2005-07-19 | Method and system for editing audiovisual files |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410069912 CN1725360A (en) | 2004-07-19 | 2004-07-19 | Method and system for editing video and audio file |
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| CN1725360A true CN1725360A (en) | 2006-01-25 |
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| CN 200410069912 Pending CN1725360A (en) | 2004-07-19 | 2004-07-19 | Method and system for editing video and audio file |
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| WO (1) | WO2006009275A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101753B (en) * | 2006-07-07 | 2011-04-20 | 乐金电子（昆山）电脑有限公司 | Audio frequency frame recognition method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4948147B2 (en) | 2006-12-15 | 2012-06-06 | 富士通株式会社 | Method and apparatus for editing composite content file |
| EP2104105A1 (en) * | 2008-03-20 | 2009-09-23 | British Telecommunications Public Limited Company | Digital audio and video clip encoding |
| EP2104103A1 (en) * | 2008-03-20 | 2009-09-23 | British Telecommunications Public Limited Company | Digital audio and video clip assembling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05101609A (en) * | 1990-09-28 | 1993-04-23 | Digital Fx Inc | System and method for editing vedeo tape |
| US6262777B1 (en) * | 1996-11-15 | 2001-07-17 | Futuretel, Inc. | Method and apparatus for synchronizing edited audiovisual files |
| GB2326781B (en) * | 1997-05-30 | 2001-10-10 | British Broadcasting Corp | Video and audio signal processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101101753B (en) * | 2006-07-07 | 2011-04-20 | 乐金电子（昆山）电脑有限公司 | Audio frequency frame recognition method |
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