CN102982827B - Mode matching method of audio data for digital audio tape (DAT) audio repair - Google Patents
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Abstract
The invention discloses a mode matching method of audio data. The method comprises the following steps: rerecording a tape for the first time and the second time by using a re-recorder to acquire first rerecording audio and second rerecording audio; normalizing the first rerecording audio and the second rerecording audio, taking one long rerecording audio of the first rerecording audio and the second rerecording audio as a primary file and taking one short rerecording audio of the first rerecording audio and the second rerecording audio as an auxiliary file; aligning the auxiliary file with the primary file; segmenting the primary file to acquire a plurality of primary file sample segments; searching auxiliary file sample segments with the waveform matched with that of each primary file sample segments in from the auxiliary file to acquire the matching relationship between each primary file sample segment and each auxiliary file sample segment; and analyzing the matching relationship to acquire available primary file sample segments and auxiliary file sample segments, and outputting the available primary file sample segments and the available auxiliary file sample segments to serve as data for repairing rerecording audio of the tape. The tape is rerecorded for two times to acquire two rerecording audio to match to acquire available sample segments of the two rerecording audio, so that condition is created for repair of the rerecording audio of the tape.
Description
Technical field
The present invention relates to a kind of matching process, particularly relate to a kind of method for mode matching of voice data.
Background technology
DAT (digtal audio tape) refers to digital audiotape, and this is a kind of high-density digital tape recording medium, and frequency sampling is three kinds of simulation LP32KHZ, digital 44.1KHZ and simulation 48KHZ, and Major Epidemic is in the nineties in last century.Owing to developing cost and manufacturing of a high price and for the consideration to copyright, its at that time towards main application be professional domain, mostly be the master tape before recording CD and make.Therefore at present the DAT tape much having precious recording material is retained by the mechanism such as radio station, TV station of countries in the world, because tape is unfavorable for preserving, and be faced with DAT technology progressively to withdraw from the market, the DAT record changer be suitable for is fewer and feweri, is therefore instant to the transcription job of these DAT tapes.
But, use DAT record changer by the data transcription on DAT tape for digital audio-frequency data time, due to the DAT transcriptional machinery defect inherently of the type, make transcript data can the random phenomenon such as distortion, loss producing segment.We find in practice, and the duration of the data of losing in transcript data is about 0.1 ~ 1.5 second, and the final audition effect of audio frequency is transcribed in impact that this is serious.And we find, the frequency that this obliterated data section occurs and position neither be fixed, but it is relevant with factors such as concrete machine, recording starting time, transcript data length, longer loss of data phenomenon generally occurs once in every about 10 minutes, and in one section of voice data of about 20 minutes, loss of data or the damage phenomenon frequency of occurrences are about 2 ~ 8 times.Therefore, transcribe through DAT record changer the DAB obtained to need to repair.
The phenomenon occurred in above-mentioned this DAT transcription is not the fortuitous phenomena occurred on other DAT record changer individual, but almost every platform DAT record changer above-mentioned phenomenon occurs transcribing Shi Douhui, the frequency just occurred or the time different.Because current DAT technology has progressively exited market, this DAT record changer stops production, and producer does not reoffer technical support yet, and it is impossible for therefore repairing on hardware and transcribing the DAB obtained.And abroad special repairing mechanism goes to repair, cost can be very high.Therefore must consider to analyze by technological means such as digital processings transcribing the audio result obtained, study, to find restorative procedure, means, realize the reparation of transcribing audio frequency to DAT.
Therefore, those skilled in the art is devoted to the method for mode matching developing a kind of voice data, transcribes in audio frequency find available data for the reparation of DAT audio frequency at DAT.
Summary of the invention
Because the above-mentioned defect of prior art, between technology to be solved by this invention, topic is to provide a kind of method for mode matching of voice data, by transcribing audio frequency carry out pattern match to two of obtaining of transcribing for twice of tape, obtain the data that can be used for the reparation of transcribing audio frequency, especially two of obtaining of transcribing for twice of DAT tape are transcribed to audio frequency and carry out pattern match, obtain the data of transcribing the reparation of audio frequency that can be used for DAT tape.
For achieving the above object, the invention provides a kind of method for mode matching of voice data, it is characterized in that, comprising:
Step 100 uses record changer to carry out first time to tape and transcribes, and the digital waveform audio frequency of acquisition transcribes audio frequency as first; Use described record changer to carry out second time to described tape to transcribe, the digital waveform audio frequency of acquisition transcribes audio frequency as second; Described first transcribes audio frequency and described second, and to transcribe the sample frequency of audio frequency identical;
Step 200 transcribes audio frequency by described first and described second data of transcribing audio frequency are normalized; Transcribe audio frequency and described second using complete described normalized described first and transcribe longer one of length in audio frequency as master file, shorter one of length is as auxiliary file;
Described auxiliary file aligns relative to described master file by step 300;
Step 400 splits described master file, obtains multiple sample segments as master file sample segments, and to master file sample segments numbering described in each;
Step 500 to be searched for the sample segments of Waveform Matching of master file sample segments described in each as auxiliary paper sample section in described auxiliary file, obtains master file sample segments described in each and the matching relationship described in each between auxiliary paper sample section;
Step 600 analyzes described matching relationship, obtains available described master file sample segments and available described auxiliary paper sample section;
Step 700 exports described available described master file sample segments and described available described auxiliary paper sample section as the data for carrying out audio frequency reparation to described tape.
Further, the described record changer in described step 100 is DAT record changer, and described tape is DAT tape.
Further, the sample frequency in described step 100 is 44.1kHz.
Further, described auxiliary file is comprised relative to described master file alignment in described step 300:
A sample segments is got in 20% position before in described auxiliary file by step 310, before described master file 10%-30% scope in the start position P of search and described sample segments
bmthe position P of data of Data Matching
min;
If step 320 P
min< 0, then failure of aliging; If P
min> P
bm, then the start position P that described master file mates with described auxiliary file is set
ahfor: P
ah=P
min-P
bm, the start position P that described auxiliary file mates with described master file
bhfor the start position P of described auxiliary file
b0; If P
min< P
bm, then the start position P that described master file mates with described auxiliary file is set
ahfor the start position P of described master file
a0, the start position P that described auxiliary file mates with described master file
bhfor: P
bh=P
bm-P
min; If P
min=P
bm, then described master file and described auxiliary file align, set the start position P that described master file mates with described auxiliary file
ahfor the start position P of described master file
a0, the start position P that described auxiliary file mates with described master file
bhfor the start position P of described auxiliary file
b0.
Further, the length of the described sample segments in described step 310 is 2
17.
Further, in described step 400 is the segmentation of equal length to the described segmentation of described master file, and described in obtaining through described segmentation, the length of each master file sample segments is all 2
14.
Further, in described step 400 is described start position P from described master file to the numbering of master file sample segments described in each
ahbeginning increases progressively successively.
Further, the described search carried out in described auxiliary file in described step 500 is the described start position P from described auxiliary file
bhstart.
Further, in described step 500 to be corresponding in turn to each data in described master file sample segments with each data in a described auxiliary paper sample section of a described master file sample segments Waveform Matching and equal.
Further, the described matching relationship of analysis in described step 600 comprises:
Step 610, for master file sample segments described in each and a described auxiliary paper sample section with its Waveform Matching, obtains described master file sample segments in described master file relative to described start position P
ahposition P
awith described auxiliary paper sample section in described auxiliary file relative to described start position P
bhposition P
b;
If step 620 P
a=P
b, then described master file sample segments and described auxiliary paper sample section are described available described master file sample segments and described available described auxiliary paper sample section; If P
a> P
b, then described master file sample segments is described available described master file sample segments; If P
b> P
a, then described auxiliary paper sample section is described available described auxiliary paper sample section.
In better embodiment of the present invention, the method for mode matching of voice data of the present invention is used to carry out audio frequency reparation to DAT tape, comprise step: use DAT record changer to carry out first time to DAT tape and transcribe, the digital waveform audio frequency obtained transcribes audio frequency as first, use above-mentioned DAT record changer to carry out second time to this DAT tape to transcribe, the digital waveform audio frequency obtained transcribes audio frequency as second, and wherein, first transcribes audio frequency and the second sample frequency of transcribing audio frequency is all 44.1kHz; Transcribe audio frequency by first and the second data of transcribing audio frequency are normalized, and using longer for wherein length one as master file, shorter one of length is as auxiliary file; Determine the start position P that master file mates with auxiliary file
ah, determine the start position P that auxiliary file mates with master file
bh, auxiliary file is alignd relative to master file; Equal length segmentation master file, obtains multiple length and is all 2
14sample segments as master file sample segments, and each master file sample segments to be numbered; At the start position P mated with master file from auxiliary file
bhto start to search in auxiliary file with the sample segments of the Waveform Matching of each master file sample segments as auxiliary paper sample section, obtain the matching relationship between each master file sample segments and each auxiliary paper sample section; Analyze this matching relationship, obtain available master file sample segments and available auxiliary paper sample section; Available master file sample segments and available auxiliary paper sample section are exported, as transcribing to this DAT tape the data that audio frequency repairs.
As can be seen here, the method for mode matching of voice data of the present invention obtains two transcribe audio frequency by carrying out transcribing for twice to DAT tape, mate by transcribing audio frequency to these two, obtain these two and transcribe sample segments available in audio frequency, these available sample segments can be used for transcribing audio frequency reparation to DAT tape.Therefore the present invention is that the reparation of transcribing audio frequency of DAT creates condition, thus is conducive to transcribing DAT tape to rescue in these tapes the precious recording material stored.Further, the method for mode matching of voice data of the present invention is not limited to, for DAT tape, can also be used for other tapes or storage medium, thus has a wide range of applications field and application prospect.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the method for mode matching of voice data of the present invention.
Fig. 2 is the schematic diagram of transcribing audio frequency as digital waveform audio frequency.
Fig. 3 is the schematic diagram of the example determining the start position mated in the method for mode matching of voice data of the present invention.
Fig. 4 is the schematic diagram of another example determining the start position mated in the method for mode matching of voice data of the present invention.
Fig. 5 is the schematic diagram searching for the auxiliary paper sample section of mating with each master file sample segments of master file A in auxiliary file B.
Embodiment
In the present embodiment, the method for mode matching applying voice data of the present invention carries out audio frequency reparation to DAT tape, as shown in Figure 1, comprises step:
Step 100, obtains first and second and transcribes audio frequency.
In this step, first using a DAT record changer to transcribe needing the DAT tape repaired to carry out first time, obtaining a digital waveform audio frequency, this digital waveform audio frequency is transcribed audio frequency as first; And then use this DAT record changer to carry out second time to this DAT tape to transcribe, obtain another digital waveform audio frequency, this digital waveform audio frequency is transcribed audio frequency as second.
Wherein, first audio frequency is transcribed and the second sample frequency of transcribing audio frequency is all 44.1kHz.
Step 200, carries out pre-service to transcribing audio frequency.
In this step, transcribe audio frequency to first and second acquisition in step 100 and carry out pre-service, pre-service comprises the data of transcribing audio frequency to this first and second and is normalized, and transcribes audio frequency compared, mate to enable two.In the present embodiment, make first and second value of transcribing the data of audio frequency through normalized in the scope of-1.0 ~ 1.0.
Then using longer for length in both one as master file A, shorter one of length is as auxiliary file B.Wherein, (as shown in Figure 2), the sequence number (i.e. sampled point) of transcribing each data in audio frequency as digital waveform audio frequency increases progressively (increment is 1) from 1, and its value and its sequence number form squiggle in a coordinate system, such as, data a (A in Fig. 2
i, i) represent that these data are i-th data of transcribing in audio frequency, its value is A
i, its sequence number is i.Like this, transcribe the length i.e. number of its data comprised of audio frequency, typically, the length of transcribing audio frequency is 2
28.
Step 300, by master file and auxiliary document alignment.
Because the comparison in follow-up step, coupling are all from file header, therefore the master file A determined in step 200 and auxiliary file B alignd and determine that the start position mated is very important, comprising step 310 and 320 particularly.
Step 310, gets a sample segments in auxiliary file.
Particularly, a sample segments is got at front 20% position in the auxiliary file B determined in step 200 (namely from the start position of auxiliary file B apart from the position at the length place of the auxiliary file B of this start position 20%) place, and the length of this sample segments is 2
17(namely comprise 2 in this sample segments
17individual data, the length do not explained below all represents the number of the data wherein comprised), record the start position P of this sample segments
bm(can think that start position is that initial data are in whole sequence number of transcribing in the data of audio frequency).The start position P of search and this sample segments in the scope of the front 10%-30% of the master file A determined in step 200
bmthe position P of data of Data Matching
min.
Step 320, determines the start position mated.
Be in particular:
If P
min< 0, then failure of aliging, enters step 800;
If P
min> P
bm, as shown in Figure 3, then set the start position P that master file A mates with auxiliary file B
ahfor: P
ah=P
min-P
bm, the start position that auxiliary file B mates with master file A is the start position P of auxiliary file B
b0; Delete the start position P in coupling on master file A
ahpart before, enters step 400;
If P
min< P
bm, as shown in Figure 4, then set the start position P that the start position that master file A mates with auxiliary file B is master file A
a0, the start position P that auxiliary file B mates with master file A
bhfor: P
bh=P
bm-P
min; Delete the start position P in coupling on auxiliary file B
bhpart before, enters step 400;
If P
min=P
bm(not shown), then master file A and auxiliary file B aligns, the start position P that master file A mates with auxiliary file B
ahfor the start position P of master file A
a0, the start position P that auxiliary file B mates with master file A
bhbe the start position P of auxiliary file B
b0, enter step 400.
Step 400, segmentation master file.
In this step, carry out equal length segmentation to the master file A through step 320, obtain multiple master file sample segments, the length of these master file sample segments is all 2
14(namely all comprise 2 in each master file sample segments
14individual data).From the start position P of master file A
ahstart (namely from the file header of master file A, owing to having deleted the start position P in coupling on master file A in step 320
ahpart before), numbering is increased progressively to each master file sample segments, such as A01, A02, A03 ...
Step 500, obtains the matching relationship between master file sample segments and auxiliary paper sample section.
Particularly, from through 320 the start position P of auxiliary file B
bh(namely from the file header of auxiliary file B, owing to having deleted the start position P in coupling on auxiliary file B in step 320
bhpart before) start to search for the auxiliary paper sample section of mating with each master file sample segments obtained in step 400, and to this auxiliary paper sample segment number.Such as, as shown in Figure 5, auxiliary paper sample section B01 mates with a master file sample segments A01, and auxiliary paper sample section B02 mates with a master file sample segments A02.When an auxiliary paper sample section B02 mates with a master file sample segments A02, each data in auxiliary paper sample section B02 are corresponding in turn to each data in master file sample segments A02 and equal, namely in auxiliary paper sample section B02 a jth data and the amplitude of a jth data equal (or both amplitude differences are less than 1%) in master file sample segments A02, wherein j travels through the number of all data in master file sample segments A02 and auxiliary paper sample section B02.
Concrete matching process is:
For each master file sample segments, from the start position P of auxiliary file B in auxiliary file B
bhstart above-mentioned search, the scope that first time searches for is [P
bh, P
bh+ 2
7× 2
14];
If do not found, then by the afterbody movable length 2 of the scope of search to auxiliary file B
11, namely for kth time search, the scope of search is [(k-1) × 2
11+ P
bh, (k-1) × 2
11+ P
bh+ 2
7× 2
14], wherein k=1,2,
If the afterbody that search arrives auxiliary file B does not find the auxiliary paper sample section of mating this master file sample segments yet, then jump to next master file sample segments, start to search for the auxiliary paper sample section of mating with this master file sample segments.
Step 600, analyzes matching relationship.
The matching relationship of this step by obtaining in analytical procedure 500, obtains available master file sample segments and available auxiliary paper sample section, comprises step 610 and 620 particularly.
Step 610, for each master file sample segments and an auxiliary paper sample section with its Waveform Matching, obtains the position P of this master file sample segments in master file A
a(namely its starting position is relative to the position of the file header of master file A), and obtain the position P of this auxiliary paper sample section in auxiliary file B
b(namely its starting position is relative to the position of auxiliary file B file header).
Step 620, comprising:
If P
a=P
b, then this master file sample segments and this auxiliary paper sample section are available master file sample segments and available auxiliary paper sample section;
If P
a> P
b, then this master file sample segments is available master file sample segments, and this auxiliary paper sample section is disabled auxiliary paper sample section;
If P
b> P
a, then this auxiliary paper sample section is available auxiliary paper sample section, and this master file sample segments is disabled master file sample segments.
The position P of master file sample segments A02 in master file A as shown in Figure 5
awith the position P of auxiliary paper sample section B02 in auxiliary file B
bbetween pass be P
a=P
b, then known master file sample segments A02 and auxiliary paper sample section B02 is available master file sample segments and available auxiliary paper sample section.
Step 700, exports in step 600 the available master file sample segments and available auxiliary paper sample section that obtain, as transcribing to DAT tape the data that audio frequency repairs.
Step 800, terminates.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all those skilled in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a method for mode matching for voice data, is characterized in that, comprising:
Step (100) uses record changer to carry out first time to tape and transcribes, and the digital waveform audio frequency of acquisition transcribes audio frequency as first; Use described record changer to carry out second time to described tape to transcribe, the digital waveform audio frequency of acquisition transcribes audio frequency as second; Described first transcribes audio frequency and described second, and to transcribe the sample frequency of audio frequency identical;
Step (200) transcribes audio frequency by described first and described second data of transcribing audio frequency are normalized; Transcribe audio frequency and described second using complete described normalized described first and transcribe longer one of length in audio frequency as master file, shorter one of length is as auxiliary file;
Described auxiliary file aligns relative to described master file by step (300);
Step (400) splits described master file, obtains multiple sample segments as master file sample segments, and to master file sample segments numbering described in each;
Step (500) to be searched for the sample segments of Waveform Matching of master file sample segments described in each as auxiliary paper sample section in described auxiliary file, obtains master file sample segments described in each and the matching relationship described in each between auxiliary paper sample section; Described matching process is as follows:
For each master file sample segments, from the start position P of auxiliary file B in auxiliary file B
bhstart above-mentioned search, the scope that first time searches for is [P
bh, P
bh+ 2
7× 2
14];
If do not found, then by the afterbody movable length 2 of the scope of search to auxiliary file B
11, namely for kth time search, the scope of search is [(k-1) × 2
11+ P
bh, (k-1) × 2
11+ P
bh+ 2
7× 2
14], wherein k=1,2,
If the afterbody that search arrives auxiliary file B does not find the auxiliary paper sample section of mating this master file sample segments yet, then jump to next master file sample segments, start to search for the auxiliary paper sample section of mating with this master file sample segments;
Step (600) analyzes described matching relationship, obtains available described master file sample segments and available described auxiliary paper sample section;
Step (700) exports described available described master file sample segments and described available described auxiliary paper sample section as transcribing to described tape the data that audio frequency repairs.
2. the method for mode matching of voice data as claimed in claim 1, the described record changer in wherein said step (100) is DAT record changer, and described tape is DAT tape.
3. the method for mode matching of voice data as claimed in claim 1 or 2, the sample frequency in wherein said step (100) is 44.1kHz.
4. the method for mode matching of voice data as claimed in claim 3, described auxiliary file is comprised relative to described master file alignment in wherein said step (300):
A sample segments is got in 20% position before in described auxiliary file by step (310), before described master file 10%-30% scope in the start position (P of search and described sample segments
bm) the position (P of data of Data Matching
min);
Step (320) is if P
min<0, then failure of aliging; If P
min>P
bm, then start position (the P that described master file mates with described auxiliary file is set
ah) be: P
ah=P
min-P
bm, the start position (P that described auxiliary file mates with described master file
bh) be the start position (P of described auxiliary file
b0); If P
min<P
bm, then start position (the P that described master file mates with described auxiliary file is set
ah) be the start position (P of described master file
a0), the start position (P that described auxiliary file mates with described master file
bh) be: P
bh=P
bm-P
min; If P
min=P
bm, then described master file and described auxiliary file align, set the start position (P that described master file mates with described auxiliary file
ah) be the start position (P of described master file
a0), the start position (P that described auxiliary file mates with described master file
bh) be the start position (P of described auxiliary file
b0).
5. the method for mode matching of voice data as claimed in claim 4, the length of the described sample segments in wherein said step (310) is 2
17.
6. the method for mode matching of voice data as claimed in claim 5, in wherein said step (400) is the segmentation of equal length to the described segmentation of described master file, and described in obtaining through described segmentation, the length of each master file sample segments is all 2
14.
7. the method for mode matching of voice data as claimed in claim 6, in wherein said step (400) is described start position (P from described master file to the numbering of master file sample segments described in each
ah) start to increase progressively successively.
8. the method for mode matching of voice data as claimed in claim 7, the described search carried out in described auxiliary file in wherein said step (500) is the described start position (P from described auxiliary file
bh) start.
9. the method for mode matching of voice data as claimed in claim 8, in wherein said step (500) to be corresponding in turn to each data in described master file sample segments with each data in a described auxiliary paper sample section of a described master file sample segments Waveform Matching and equal.
10. the method for mode matching of voice data as claimed in claim 9, the described matching relationship of analysis in wherein said step (600) comprises:
Step (610), for master file sample segments described in each and a described auxiliary paper sample section with its Waveform Matching, obtains described master file sample segments in described master file relative to described start position (P
ah) position (P
a) and described auxiliary paper sample section in described auxiliary file relative to described start position (P
bh) position (P
b);
Step (620) is if P
a=P
b, then described master file sample segments and described auxiliary paper sample section are described available described master file sample segments and described available described auxiliary paper sample section; If P
a>P
b, then described master file sample segments is described available described master file sample segments; If P
b>P
a, then described auxiliary paper sample section is described available described auxiliary paper sample section.
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| CN202093836U (en) * | 2011-06-15 | 2011-12-28 | 深圳市佳音王电子有限公司 | Audio converting device |
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