CN106229000A

CN106229000A - A kind of Digital Learning content playback method

Info

Publication number: CN106229000A
Application number: CN201610563193.0A
Authority: CN
Inventors: 赵天鸽
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-18
Filing date: 2016-07-18
Publication date: 2016-12-14

Abstract

The invention discloses a kind of Digital Learning content playback method, comprise the steps: S1, recorded at a high speed tape voice by sound card: configuration high-speed magnetic tape re-recording apparatus, it is provided that positive and negative 4 sound channels simultaneously, respectively with 4,8,16,32 speed copy backs；S2, high speed audio processing system is used to carry out Audio Processing: high speed audio frequency processing system based on DSP, realize 32 speed tape front-back two-sided voice direct digitization, improve the digitized process of tape audio, complete DAB simultaneously and be converted to the function of analogue audio frequency speedy carding process；S3, the preservation of digital voice file: will be stored in the concentration of the audio file on hard disc of computer and be burnt on CD preserve；S4, digital speech simulated: by computer audio digital document reduction recorded on tape, by the high speed method for recording of sound card, can preferably realize the digitized of tape voice information, in conjunction with the use of duplicator, improve digitized efficiency.

Description

A kind of Digital Learning content playback method

Technical field

The present invention relates to digitizing technique field, be specifically related to a kind of Digital Learning content playback method.

Background technology

For many years, preserve the most economic method easily of foreign language teaching listening materials with cassette tape, most high School is designed with speech room and is responsible for the teaching collection of tape, keeping specially and provides copy services to work for teachers and students, speech room one As all have accumulated substantial amounts of Tapes, these data are also considered valuable intellectual property as written historical materials, although existing Emerge in an endless stream for phonetic material, abundant numerous and diverse, and most employing calculate machine-readable/storage mode of putting, such as: CD, VCD, DVD, MP3, WMA, RM etc., the form with tape as circulation way has greatly superseded gesture, owing to the characteristic of tape itself determines There is serious defect, such as in it: tape belongs to contact media, and it is covered by magnetic material and makes on tape base, this Result in that its life-span is short, signal to noise ratio is low, fragile, repeatedly record after information loss serious, so that cannot use.

Universal and its performance of media computer, function improve constantly so that digital speech, digital audio/video data are aobvious Illustrating its huge advantage and prospect, the digitized of voice can solve the problem that tape voice exists up hill and dale, therefore puts Task in front is: how high-quality, expeditiously a large amount of tape voice data are converted into digital voice file, simultaneously by it Preserve with the form of CDROM, and can also easily and conveniently reduce and become tape voice, for the most widely used tape Teaching uses.

Summary of the invention

For problem above, the invention provides a kind of Digital Learning content playback method, the method is simple, Videocorder and computer sound card functional in the case of, can preferably obtain digitized audio document, be suitable for simultaneously voice and The conversion of the data such as music, can effectively solve the problem in background technology.

To achieve these goals, the technical solution used in the present invention is as follows: a kind of Digital Learning content playback method, Comprise the steps:

S1, recorded at a high speed tape voice by sound card: configuration high-speed magnetic tape re-recording apparatus, it is provided that positive and negative 4 sound channels simultaneously, Respectively with 4,8,16,32 speed copy backs；

S2, high speed audio processing system is used to carry out Audio Processing: high speed audio frequency processing system based on DSP, it is achieved 32 speed tape front-back two-sided voice direct digitization, improves the digitized process of tape audio, completes DAB simultaneously and turn It is changed to the function of analogue audio frequency speedy carding process；

S3, the preservation of digital voice file: will be stored in the concentration of the audio file on hard disc of computer and be burnt on CD Preserve；

S4, digital speech simulated: by computer audio digital document reduction recorded on tape.

Preferably, if the signal converting computer recorded in described step S1, owing to computer can not be supported to record at a high speed Sound, uses following method to realize:

(1) using two computers or two pieces of sound cards of a computer band, they performances are identical, are respectively connected to duplicator Positive and negative audio signal interface；

(2) duplicator can only be play with 4 speeds, and two computers are recorded simultaneously, and recording is selected above the sampling of 64kHz Speed；

(3) after having recorded, forming two, positive and negative recording file, reverse side recording file is the information that reverse direction is recorded, Establishment corresponding software, is all inverted to positive direction by opposite direction recorded information；

(4) it is 4 speeds owing to playing, and record the file record of formation is normal speed, is revised by making software Wave file relevant parameter information so that it is show as 4 speed information.

Preferably, the audio files recorded by sound card saves as wav file, and wav file storage is DAB ripple Graphic data.

Preferably, the duplicator in described high speed audio processing system is with high speed playback, and two-sided 4 sound channel voice signals are by holding Son row's access system, is sampled by 4 road A/D after 4 road signals entrance modulate circuits, and the signal after sampling is introduced into FIFO and delays Deposit, when in FIFO data reach a certain amount of after, pass to DSP and carry out digital filtering and splits' positions and process, directly formation positive and negative 2 Individual mp3 file data, the data compressed send computer to by USB interface and store.

Preferably, in computer, positive and negative two mp3 file data, pass to system through USB interface, decompress in dsp, Synthesis processes, and forms 4 tunnel audio signals, comprises front double track positive direction normal speed audio signal, the inverse side of reverse side double track To normal speed audio signal, being played out with high speed by 4 road D/A, the signal played out is put by 4 road modulate circuits Export duplicator through terminal block after great, then be transcribed on tape to be recorded.

Beneficial effects of the present invention:

The present invention high speed method for recording by sound card, shows in sound lab simulation experiment, can preferably realize magnetic With the digitized of voice messaging, also can realize the digital speech conversion to analog voice, high speed method for recording takes full advantage of many The performance of media computer, in conjunction with the use of duplicator, improves digitized efficiency.

Accompanying drawing explanation

Fig. 1 is the flow chart of the present invention.

Detailed description of the invention

In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and It is not used in the restriction present invention.

Embodiment:

With reference to shown in Fig. 1, the present invention provides a kind of Digital Learning content playback method, comprises the steps:

If the signal converting computer recorded, owing to computer can not be supported to record at a high speed, following method is used to realize:

The method improves the efficiency of 8 times than former approach, but have to be understood that recorded file parameter information, adds and turns The complexity changed, but it is still feasible under existence conditions；If with 96kHz sample 4 speeds input audio frequency, according to sampling Theorem, the method can the audio-frequency information of preferably below fidelity 12kHz, fully meet the recording of tape voice.

The audio files recorded by sound card saves as wav file, and wav file storage is DAB Wave data, Wav file form supports various sampling rates, bit resolution, supports multichannel, uses widely.

Wav file head: wav file head have recorded the information of this audio file, including: sample frequency, channel number, per second Average byte number, every sample bytes number.

Duplicator in high speed audio processing system is accessed system with high speed playback, two-sided 4 sound channel voice signals by terminal block System, is sampled by 4 road A/D after 4 road signals entrance modulate circuits, and the signal after sampling is introduced into FIFO caching, when in FIFO Data reach a certain amount of after, pass to DSP and carry out digital filtering and splits' positions and process, directly positive and negative 2 the mp3 file numbers of formation According to, the data compressed send computer to by USB interface and store.

In computer, positive and negative two mp3 file data, pass to system through USB interface, decompress in dsp, at synthesis Reason, forms 4 tunnel audio signals, comprises front double track positive direction normal speed audio signal, reverse side double track reverse direction normal Speed audio signal, is played out with high speed by 4 road D/A, the signal played out be amplified by 4 road modulate circuits after warp Terminal block exports duplicator, then is transcribed on tape to be recorded.

Native system is actually subjected to realize 2 functions: one is tape numeral dump, will audio-frequency information on master tape with at a high speed Mode is recorded on computer；Two is tape numeral copy back, will be recorded in the way of at a high speed by the audio data on computer On tape to be recorded, previous function is in addition to for tape voice digitized copy back, it may also be used for depositing with audio cassette form in a large number Precious historical summary carry out protectiveness storage.

S3, the preservation of digital voice file: will be stored in the concentration of the audio file on hard disc of computer and be burnt on CD Preserve；Should be noted that is local as follows:

(1) high-quality disc is selected, the multiple preservation of imprinting simultaneously, in case disc damage；

(2) audio file typically constitutes from using a large amount of disk space, after imprinting completes, should delete file, reserve disk space Standby；

(3) data information wants labelling to understand, concisely accurate including file designation in the labeling of CD, dish, is beneficial to search；

(4) Rational Classification, in addition to classifying disc contents, in dish, file also should use and point be stored in difference file and divide Class；

(5) disc avoids friction, greasy dirt, application flexible material packaging, not weight, is stored in dry and clean place.

Wave file form change: the reversion of tape reverse side reverse direction information, according to Wave data record format, only need by The 1st left and right acoustic channels data of file data part and last left and right acoustic channels data, the 2nd left and right acoustic channels data and reciprocal the 2 left and right acoustic channels data ... exchange successively, and retain left and right acoustic channels invariant position, are easy to by programming making software Realize.

Recording at a high speed reduction, record is 96kHz4 speed sampled data as shown in table 1, normal speed to be reduced to, only Sampling rate 96000 need to be revised as 24000, average byte number 384000 (96000 × 4) per second is revised as 96000 simultaneously (24000 × 4), are also easily achieved by programming making software.

Wave file compresses: utilize audio compression software wav file quickly can be converted into batch MP3 or other compression Formatted file, it is achieved after compression, can delete wav file, thus reserve a large amount of disk space.

Based on above-mentioned, it is an advantage of the current invention that the present invention passes through the high speed method for recording of sound card, at sound lab mould Draft experiment shows, can preferably realize the digitized of tape voice information, also can realize the digital speech conversion to analog voice, High speed method for recording takes full advantage of the performance of multimedia computer, in conjunction with the use of duplicator, improves digitized efficiency.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.

Claims

1. a Digital Learning content playback method, it is characterised in that comprise the steps:

S2, high speed audio processing system is used to carry out Audio Processing: high speed audio frequency processing system based on DSP, it is achieved 32 times Speed tape front-back two-sided voice direct digitization, improves the digitized process of tape audio, completes DAB simultaneously and be converted to The function of analogue audio frequency speedy carding process；

A kind of Digital Learning content playback method the most according to claim 1, it is characterised in that record in described step S1 If the signal converting computer of system, owing to computer can not be supported to record at a high speed, following method is used to realize:

(1) using two computers or two pieces of sound cards of a computer band, they performances are identical, are respectively connected to duplicator positive and negative Face audio signal interface；

(2) duplicator can only be play with 4 speeds, and two computers are recorded simultaneously, and recording is selected above the sampling speed of 64kHz Rate；

(4) it is 4 speeds owing to playing, and record the file record of formation is normal speed, revises waveform by making software File relevant parameter information so that it is show as 4 speed information.

A kind of Digital Learning content playback method the most according to claim 1, it is characterised in that recorded by sound card Audio files saves as wav file, and wav file storage is DAB Wave data.

A kind of Digital Learning content playback method the most according to claim 1, it is characterised in that at described high speed audio Duplicator in reason system is entered conditioning with high speed playback, two-sided 4 sound channel voice signals by terminal block access system, 4 road signals Sampled by 4 road A/D after circuit, the signal after sampling be introduced into FIFO caching, when in FIFO data reach a certain amount of after, pass Passing DSP and carry out digital filtering and splits' positions process, directly form positive and negative 2 mp3 file data, the data compressed are passed through USB interface sends computer to and stores.

A kind of Digital Learning content playback method the most according to claim 4, it is characterised in that in computer positive and negative two Individual mp3 file data, pass to system through USB interface, decompress in dsp, synthesis process, form 4 tunnel audio signals, comprise Front double track positive direction normal speed audio signal, reverse side double track reverse direction normal speed audio signal, by 4 road D/A Playing out with high speed, the signal played out exports duplicator through terminal block after being amplified by 4 road modulate circuits, then turns Record to tape to be recorded.