CN1313595A - Optical file recorder with provided enlonged recording time and pre-made by original copy - Google Patents

Optical file recorder with provided enlonged recording time and pre-made by original copy Download PDF

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Publication number
CN1313595A
CN1313595A CN 00103437 CN00103437A CN1313595A CN 1313595 A CN1313595 A CN 1313595A CN 00103437 CN00103437 CN 00103437 CN 00103437 A CN00103437 A CN 00103437A CN 1313595 A CN1313595 A CN 1313595A
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numerical data
digital
master
making
data
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马丁J·博德
罗伯特A·罗森布鲁
伊戈尔·洛克莫特夫
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Computer Performance Inc
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Computer Performance Inc
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Abstract

An optical archives recorder has an optical recorder able to copy its record to optical record medium and a log-in workstation with network adapter, both of which receive the analog signals, digitalize said signals and store the digitalized signal to buffer which may be high-capacity RAM or hard disk. When the space possessed by the digitalized signal is greater than the predefined space in buffer, the data is compressed for continuing to record.

Description

Master is the archives optical recorder of writing time that make, that prolongation is provided in advance
The present invention relates generally to data recording, and relate in particular to the dossier that carries out with the compressed format of fetching easily to digital data.
The situation that exists audio frequency or low bandwidth data to be recorded with the time that this record takes place.The example of the information that various types of quilts write down like this comprises phone and radio talks, radar data, fax and modem communication.This be recorded in public security bureau, airway traffic control facility, hospital, prison, commission house and the like environment especially necessary.The system that can carry out this function uses for many years commercial, and is commonly called record logger (recording logger), or only is called logger.The initial log device is based on continuous real time modelling magnetic recording, and this record can provide this application-specific required function.But this simulation magnetic logger system bulk is big, needs big quantity space to store the audio cassette that is used to file audio recording.
For overcoming these shortcomings of existing simulation logger, used the digital logger of going up record at digital audiotape (" DAT ").Although much smaller than existing analog record technology, they also show some shortcomings to the DAT of digital logger and their record data on volume.A difficulty being exposed at first of numeral logger be DAT do not provide a kind of effectively with the pattern of time correlation, this pattern allows also to fetch reliably fast the record that carries out at special time.Another shortcoming is that the existing digital logger can not effectively utilize available record space on DAT.It is will stand bigger wearing and tearing with the DAT magnetic tape station that this logger uses that the existing digital logger also has a shortcoming, because whether just write audio frequency they all move.
Exercise question is the U.S. Patent No. 5 of publishing September 5 nineteen ninety-five of " Method and a System for Storing Audio ", 448,420 (" ' 420 patents ") disclose a kind of multiple input path apparatus and method that recording audio is fetched based on the time according to this on DAT that allow.And disclosed digital logger more effectively uses the record space on each DAT, and only activates the DAT magnetic tape station when record.The numeral logger at first is converted to numerical data to the sound signal of each input channel, and then also data from 64kb/ second/passage boil down to 13kb/ second/passage.After numerical data is compressed, be stored in the impact damper.Subsequently, digital logger is fetched data and it is recorded on the DAT from impact damper.By this way, impact damper is complementary the digitization rate of Audio Processing and DAT magnetic tape station data transfer rate.In addition, only data are recorded on the DAT when digital logger received audio signal, record not during quiet interval.
For the time-based of data that helps to write down fetched, digital logger is divided into main subregion and less important subregion to the data that are recorded on the DAT.Less important subregion is positioned at the beginning of DAT.The storage of less important subregion is used for being recorded in the time of the beginning of the data on the DAT and end and the time and the length of the record slot (sessions) read from the clock that is included in digital logger.Less important subregion can comprise information such as medium format, manufacturer's mark, format type product mark, driver producer, logical unit type (LU type), logical block software version and other similar information of the magnetic tape station of DAT.In addition, less important subregion is stored the table that is used for fetching specific record data that will be described.
Main subregion comprises a plurality of file marks.Each file mark has been followed title and at least one data set, and each data set comprises a plurality of audio blocks.Each audio block from input channel audio recording to digital logger.When digital logger does not all receive audio frequency on any input channel, do not produce title or group, and only a plurality of continuous file marks are recorded on the DAT.Each file mark is represented a time quantum, and for example 6 seconds, and each group has the time of distribution, for example about 1 and 2/10ths second (1.2).The time cycle that 5 distribution for example, are arranged between file mark.When digital logger during received audio signal, produces allocation of space to a group on corresponding input channel in the time interval that distributes.Although each group can not be recorded, each file mark that is recorded on the DAT is represented 6 seconds.Each group has the audio block that specifies number, and for example 32, each audio block is represented 1.2 seconds.If therefore any audio block received audio frequency from its corresponding input channel during 1.2 seconds that distribute, then data set writes down 1.2 seconds sound signal.
Each title that is recorded on the DAT comprises one group of mapping table, and from the existence of the audio frequency of specific input channel record whether it specify corresponding relation between input channel sequence number and the group sequence number and representative.During a record slot, each group mapping table is written into its corresponding title.After each record slot, the group mapping table data of that period also are written into the accumulation schedule that is arranged in the less important subregion that DAT begins to locate.Use the clock of digital logger, the start time of record slot is written into less important subregion, and the concluding time of record slot also is written into.By this way, representative of less important subregion accumulation is recorded in the table of the group mapping table in all titles on the DAT.When DAT fetches audio recording, the group mapping table data of digital logger service recorder in less important subregion come in a series of data set the location from the audio block of specific input channel record.
Although disclosed digital logger has advantage than existing simulation logger in ＇ 420 patents, consider extension of network harmony likeness of the deceased amount, it still has shortcoming.Exercise question is the U.S. Patent No. 5 of publishing on October 6th, 1998 of " Modular DigitalRecording Logger ", 819,005 (" 005 " patent) discloses a kind of digital logger, it has the principal computer and the storer of whole operation of main card, the control figure logger of the elementary cell that comprises 4 primary clusterings, the sound card with a plurality of input channels, processing audio, and wherein each input channel of sound card simultaneously and several separate source such as telephone communication.
In audio-source was communicated by letter, each sound card received simulating signal and they is converted to numerical data, transmits these numerical datas to main card through time division multiplexing (TDM) bus.Main card and sound card be through the state of TDM bus communication with the monitoring sound card, thereby and determine which needs service.Main card is carried out compress speech and expansion also the packing data of fetching from sound card, and carries out VOX and other functions.Main card also is connected in industrial standard architectures (" ISA ") bus, and is the same as microprocessor, lan adapter and scsi adapter.The behavior of other digital logger assembly is monitored and coordinated to the computer program that microprocessor is carried out.Be the digital audio data of recording compressed, scsi adapter is also communicated by letter with at least one hard disk drive with at least one DAT magnetic tape station.The audio data recording of being stored in the required part of this data that allows on the hard disk when digital logger continues data recording on DAT and hard disk, to reset.
The digital logger of ＇ 005 patent disclosure is modular, thereby its capacity can easily expand on demand with little cost, and software can be revised on demand easily.In addition, lan adapter allows each digital logger of ＇ 005 patent description as a part that comprises the network system of other digital logger and workstation.The workstation that is connected in LAN is similar to digital logger, and just they have omitted scsi adapter, DAT magnetic tape station and hard disk drive.As described in ＇ 005 patent, workstation can be only receives from the compressed digital voice data of digital logger through LAN to be reset at workstation being used for.
But,, still have economically obstruction and operational difficulty although cost so far makes great efforts to construct digital logger record data effectively and easily on DAT in a large number.For example, the price of DAT magnetic tape station is archives optical recording technology such as write-once compact disk (" CD-R ") register 2 to 3 times.And in the time of in being used in digital logger, the DAT magnetic tape station shows low reliability, and mean time between failures of 2000 hours (" MTBF ") for example is because be used for the complicated mechanism of spiral scan needs of DAT magnetic recording.
And when being used for digital logger, the DAT magnetic tape station must always move or usually cut out and open.These operator schemes are obviously different with the operator scheme that is designed for the DAT magnetic tape station, and the DAT magnetic tape station often is not closed and opens in the latter, in case and open then for example be held open in 10 minutes in the long relatively time interval.Because the DAT magnetic tape station is not designed to any in must the operator scheme of employing of digital logger institute, this magnetic tape station presents low reliability when being used for these purposes.
Except making them for the not attractive characteristic of audio frequency login, the form that is used for writing down digital logger data and fetch recorded data on the DAT described in ＇ 420 patents is a poor efficiency and time-consuming in the DAT magnetic tape station.When at the DAT identifying recording layer, digital logger must accumulate and keep will be recorded in subsequently the data that are arranged in the less important subregion that DAT begins to locate.The numeral logger must be periodically unrolls DAT to beginning the place, record data in less important subregion, and the end of the data of return recording continues record then.
After data had been recorded on the DAT, isolating and recover specific talking through the telephone from DAT was loaded down with trivial details processing procedure.Fetching specific talking through the telephone from DAT at first needs tape unrolled and reads less important subregion, and searches for tape then downwards to listen to the audio block that may comprise or not comprise the specific input channel of required talks.If selected wrong audio block or passage, listen to other audio block needs that are used for same or another input channel and once more DAT is unrolled and read less important subregion once more, and and then search for tape downwards to listen to other audio block.
Except that with use is used for the relevant foregoing problems of the DAT of digital logger, in some environment, the record format of talking through the telephone that is used to use the DAT recording technique described in ＇ 420 patents to login on DAT may hinder law enforcement.If the copy that the enforcement personnel must provide the use talks that this technology writes down on DAT in judicial procedure is as evidence, so the numerical data that in question input channel write down is mixed inevitable the intersection with all other talks of logining simultaneously from other input channel of digital logger.On the single DAT tape that must be disclosed as the part of judicial procedure the intersection of two or more talks mix produce a kind of may, i.e. other talks of writing down simultaneously may be used to judicial procedure is produced wrongful obstruction.
And as known for many years, tape is not regarded as the dossier medium.Pass in time, the magnetic tape recording medium quality descends and the information that is recorded in becomes and can not recover there.Subsequently, the archive database that has been recorded on the tape-shaped medium's must be by being updated periodically the copying data that is stored in old medium to new medium.For example, commercial manufacturers designs the only life-span in 7 years to DAT.On the contrary, known dossier medium with the serviceable life in 100 years can be the product of optical recording technology, as microfilm.Newer optical recording technology such as CD-R, CD-RW, write-once digital video disc (" DVD-R ") and the media manufacturer that can rewrite digital video disc (" DVD-RW ") at present serviceable life of this recording medium of estimation about 30 years to 35 years to 100 years.But, directly use CD-R, CD-RW, DVD-R and CD-RW technology to have several technology barriers to using in a conventional manner as the required simulated data record of digital logger.
At first, at present each CD-R or CD-RW only can preserve 74 minutes stereo to legacy user CD audio recording form.On the contrary, the writing time of several input channels of audio frequency login minimum needs every day hour, this makes traditional C D voice-frequency sender be directly used in the sort of application and becomes and do not gear to actual circumstances.And user quality audio frequency CD register has about 1000 hours MTBF.Therefore, even conventional audio CD record format can write down the audio recording of several input channels hour in essence in some way every day, the approximately per 40 days inaction interval of this register can overslaugh use this technology in digital logger.
Although there is " multi-period " record format in the CD-R technology for the compressed digital-data that is used for writing down the representative simulation signal, each continuous record slot takies the storage space of about 20MB on the CD-R medium.Because CD-R and CD-RW medium provide the memory space of about 650MB, a series of about 32 multi-periodly are recorded in the full single CD of occupation space complete filling on the CD-R medium.
An object of the present invention is to provide a kind of device that on the time period that prolongs, receives simulating signal and being illustrated in of simulating signal is recorded as compressed digital-data on the real dossier medium.
Another object of the present invention provides a kind of device, when it remains on the simulating signal that is recorded as compressed digital-data on the archives medium, fetches and playback when also allowing the simulating signal that receives.
Another object of the present invention is to allow playback at once before as the simulating signal on the archives medium of being recorded in of compressed digital-data.
Another object of the present invention provides a kind of digital logger, and it can be recorded in the analog sound data of 20 input channels hour on CD-R or the CD-RW medium with the digital data record form fetching easily and reset at least.
Another object of the present invention provides a kind of device, its input channel by improving the simulating signal be recorded as compressed digital-data gradually hour, allowing having the analog signal record of uncertain duration is compressed digital-data, even the quality of the simulating signal of resetting from the compressed digital-data of record has descended.
It is the system of compressed digital-data that another object of the present invention provides a kind of being used for analog signal record, allows to transmit fast and exactly and the compressed digital-data of duplicated record.
Another object of the present invention is to be simulating signal compressed digital-data with the format record with the standard personal computer system compatibility, uses traditional digital communication protocol, network and system to come playback thereby this record can easily be sent to position at a distance.
Another object of the present invention provides a kind of redundant apparatus of reinforcement, even when the device that is used for writing down temporarily can not use, also can on real archives medium, be recorded as compressed digital-data to the simulating signal that the time period through prolonging receives on the archives medium.
In brief, one embodiment of the present of invention are that master is made the optical recorder of (premastering) in advance, comprise the input signal regulating circuit, and the simulating signal that is used for its input channel is received is carried out electronic control.The pre-optical recorder of making of master also comprises Code And Decode device (" CODEC "), and it is connected in the input signal regulating circuit, is used to receive the simulating signal from after adjusting there, and the analog signal conversion that is used for after the adjusting is a numerical data.The pre-optical recorder of making of master also comprises random access memory (" RAM "), and it is connected in CODEC, is used to receive and temporarily store the numerical data that CODEC produces.The impact damper that is also included within the pre-optical recorder of making of master receives and semipermanent ground storage numerical data from RAM.The pre-optical recorder of making of master also comprises optical disc recorder, and it is connected in RAM and is applicable to the pre-digital data record of making of master on optical recording media.
The CPU (central processing unit) (" CPU ") that is also included within the pre-optical recorder of making of master is connected in CODEC, RAM, impact damper and optical disc recorder.CPU combine digital computer program, this program:
1. the operation of the pre-optical recorder of making of monitoring master is used for:
A. the existence in response to the simulating signal on the input channel of the pre-optical recorder of making of master is sent to RAM by the numerical data that CODEC produces from CODEC;
B. then numerical data is sent to impact damper from RAM and writes down numerical data with being used for semipermanent there;
2. periodically fetch the semipermanent ground numerical data of record there from impact damper, thereby the numerical data that processing is fetched is prepared the pre-numerical data of making of master with a kind of form, and this form allows the analog signal record of 20 input channels that receive through the input signal regulating circuit hour at least on optical recording media; And
3. the pre-numerical data of making of master is sent to optical disc recorder, is used for the optical recording media of the pre-digital data record of making of master at optical disc recorder.
An alternative embodiment of the invention is a logon workstations, and it is suitable for being included in the network, and this network comprises at least one digital logger register.Be similar to the pre-optical recorder of making of master, logon workstations comprises input signal regulating circuit, CODEC, RAM, impact damper and CPU.Be different from the pre-optical recorder of making of master, logon workstations omits optical disc recorder and generally includes the network interface circuit that is connected in RAM, and this network interface circuit is as the interface between network and logon workstations.Therefore, the network interface circuit digital logger register that allows logon workstations and other workstation and also be connected in network carries out electronic communication.In logon workstations, CPU combine digital computer program, this program:
1. the operation of monitoring logon workstations is used for:
A. the existence in response to the simulating signal on the input channel of logon workstations is sent to RAM by the numerical data that CODEC produces from CODEC;
B. then numerical data is sent to impact damper from RAM, is used for semipermanent ground and writes down numerical data there;
2. periodically fetch the semipermanent ground numerical data of record there from impact damper, the numerical data that processing is fetched is to prepare compressed digital-data from it, and this compressed digital-data will be recorded to impact damper and substitute the numerical data of fetching; And
3. through network interface circuit numerical data periodically is sent to network from impact damper, is used for receiving by the digital logger register that is connected in network.
To those skilled in the art, to the specific descriptions of the preferred embodiment shown in each accompanying drawing, the feature of these and other, purpose and advantage will obtain understanding or be conspicuous from following.
Fig. 1 is that expression is according to the skeleton view that is particularly useful for as the pre-archives optical recorder of making of master of digital logger of the present invention;
Fig. 2 is the block diagram of digital logger shown in Figure 1;
Fig. 3 is the histogram how compression of diagrammatic representation numerical data reduces storage demand;
Fig. 4 describes the block diagram of the network that comprises pre-archives optical recorder, workstation, logon workstations and the digital logger register of making of the master shown in Fig. 1 and 2;
Fig. 5 is the detailed block diagram of one of 4 input channels of expression, and it is that the input signal regulating circuit shown in the block diagram of Fig. 2 and CODEC and fifo circuit offer the digital logger of expression here;
Fig. 6 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 Status view (STATUS VIEW) panel;
Fig. 7 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 setup menu (SETUP MENU) panel;
Fig. 8 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 choice menus (OPTION MENU) panel;
Fig. 9 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 the time that is provided with (SET TIME) panel;
Figure 10 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 maintenance menu (MAINTENANCE MENU) panel;
Figure 11 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 incident login menu (EVENT LOG MENU) panel;
Figure 12 is illustrated in the operator's of the pre-archives optical recorder of making of master of presenting on the LCD that is included in wherein among Fig. 1 optical-disc device menu (DISCWARE MENU) panel.
Fig. 1 represents to be particularly useful for as the pre-archives optical recorder of making of the master of digital logger, and it is with mark 10 indications.Numeral logger 10 comprises front panel 12, and installation is used for ON/OFF 14 that digital logger 10 is opened or closed it on.Front panel 12 is also passed by a plurality of buttons, and these buttons comprise beginning/stop button 16, hot burning (hot-burn) button 18 and 3 menu navigation button 22a-22c.Menu navigation is turned round 22a-22c and is allowed the operator of digital logger 10 to select specific project from actions menu, on the LCD (" LCD ") 24 of 4 lines of digital logger 10 in being included in front panel 12,40 row menu is presented to the operator.Front panel 12 also comprises light emitting diode (" LED ") the VU meter 26 that shows simultaneously by the recording level of each simulating signals that receives of 4 input channels of digital logger 10.The recording level of must precise monitoring and being controlled at expression on the VU meter 26 is automatically avoided undesired distortion simultaneously so that make full use of audio compression.Be selected to allow on CD-R, CD-RW, DVD-R or DVD-RW medium or any other optical disc recorder 28 of simulated light recording medium identifying recording layer just in time extends front panel 12 below VU meter 26.
The rotation input channel selector switch 32 that protrudes in front panel 12 allows to select in 4 input channels of digital logger 10 to monitor during its record.It is just in time outstanding from front panel 12 below input channel selector switch 32 to rotate back to playback amount control 34.Playback volume control 34 allows operators to adjust the amplitude that offers the output signal of fetching jack 36 when the input channel recorded data that playback is selected by input channel selector switch 32.Fetch jack 36 be positioned at the control of front panel playback 12 last time amount just in time 34 below.
The block diagram of Fig. 2 is described the preferred embodiment of the digital logger 10 shown in Fig. 1.As shown in Figure 2, digital logger 10 comprises simultaneously the input signal regulating circuit 42 that receives respectively from many simulating signal such as the telephone signals to 4 that are included in 4 input channel jack 44a-44d in the digital logger 10.Contact Fig. 5 carries out specific explanations below, and the simulating signal that input signal regulating circuit 42 electronic control are received by each input channel of digital logger 10 is to produce 4 simulating signals after the adjusting, and each simulating signal is suitable for being converted to numerical data respectively.
Simulating signal after 42 of input signal regulating circuits are regulated is through regulating the input end and first-in first-out (" the FIFO ") circuit 48 that is also included within the digital logger 10 that analog signal bus 46 is provided to Code And Decode device (" CODEC ").Each that is included in 4 CODEC in CODEC and the fifo circuit 48 is converted to numerical data to one of simulating signal after the adjusting that receives from input signal regulating circuit 42 respectively.When the analog signal conversion after regulating was numerical data, each CODEC was preferably the simulating signal of μ Law compression applications after regulating.The application of μ Law compression is amplified weak simulating signal effectively and thereby strong simulating signal decay is reduced in by the volume range the compressed digital-data of the analogue signal generating of CODEC after regulating.
Numeral logger 10 also comprises CPU (central processing unit) (" CPU "), ROM (read-only memory) (ROM) and random access memory (" RAM ") circuit 52.Be included in CPU in CPU, ROM and the RAM circuit 52 preferably by the Advanced Micro Devices of California Sunnyvale, 186 series microprocessors that Inc. (AMD) company makes, it is at 50MHz or preferably operate in the 100MH clock period.Being included in ROM in CPU, ROM and the RAM circuit 52 preferably provides 256KB capacity at least to be used for storing " guiding " computer program that Power-On Self-Test (" POST "), CPU carry out and allows from the program of the computer program of the CD-ROM upgrading CPU execution of optical disc recorder 28.Be included in RAM in CPU, ROM and the RAM circuit 52 and provide preferably at least that the memory space of 1.0MB is used to store computer program and the required data of digital logger 10 operations that CPU carries out.
Preferably the processor bus 54 of Peripheral Component Interconnect (" PCI ") bus is connected in CODEC and fifo circuit 48 to CPU, ROM and RAM circuit 52.When 10 operations of digital logger, the computer program of operating under real time operating system that CPU carries out periodically each of 4 FIFO from be included in CODEC and fifo circuit 48 is fetched μ Law compressed digital-data that relevant CODEC produces and a numerical data of fetching is stored among the RAM.After the execution of computer program was stored into μ Law compressed digital-data among the RAM, computer program μ Law compressed digital-data was provided in the impact damper that is provided by read-write direct access storage device (as be included in the digital logger 10 47GB hard disk 56) then.For allowing to write down numerical data on hard disk 56, digital logger 10 comprises and is connected in the ATAPI host adapter 62 of processor bus 54 to communicate by letter with RAM circuit 52 with CPU, ROM.ATAPI host adapter 62 also is connected in hard disk 56 by integrated driving arrangement (" IDE ") bus 64.Except that the compressed digital-data of storage by digital logger 10 records, hard disk 56 is also stored the computer program of being carried out by the CPU that is included in CPU, ROM and the RAM circuit 52.
When recording μ Law compressed digital-data on the hard disk 56, the computer program that CPU carries out writes independently file to this data, and each file is only stored single data of talking through the telephone.Data storage in file the time, computer program opens file with the access right that only limits to add.By opening file with the access right that only limits to add, computer program can make file be in a kind of state, in this state can by the CPU that under the control of real time operating system, operates other computer program of carrying out simultaneously read this document.Therefore, when a computer program stored the specific μ Law compressed digital-data of talking through the telephone in the file on the hard disk 56, another computer program of carrying out simultaneously can be read and playback of data from identical file.
Occupying in advance the storage space (for example 90% of available 47GB) of the quantity of establishing on the hard disk 56 at the μ Law compressed digital-data of record after, real time operating system automatically begins the first background computer program of carrying out and further compresses the file that only comprises before with the used numerical data of talking through the telephone of μ Law packed record.The phase one that the digital data compression that increases is handled is whole numerical data of talking through the telephone adaptive difference pulse code modulation (" ADPCM ") compression from μ Law compressing and converting.Talking through the telephone is converted to the ADPCM compressed digital-data and makes vacating space on hard disk 56, thereby the direct record that allows to be used for the up-to-date μ Law compressed digital-data of talking through the telephone that receives can continue.The first background computer program of execution is vacateed enough spaces on hard disk 56 after, or after the talks of the μ of all precedence records Law compressed call have been converted into the ADPCM compression, stop the operation of background computer program.
If the μ Law compressed digital-data of state-of-the-art record and ADPCM compressed digital-data occupy on the hard disk 56 storage space (for example 70% of available 47GB) of the quantity of establishing in advance, real time operating system automatically begins to carry out the second background computer program and further compresses and comprise the file that precedence record is the used numerical data of talking through the telephone of ADPCM packed data.The subordinate phase of the compression that increases is the file conversion of ADPCM compressed digital-data to comprise the G.723 file of the numerical data of standard compression of basis.The numerical data vacating space on hard disk 56 once more of talking through the telephone and being converted to G.723 compression, thus allow to be used for the continuation record of the up-to-date μ Law compressed digital-data of talking through the telephone that receives.
Be used to begin from μ Law compression to the ADPCM compression be based on amount of space that further packed data recovers and the further needed time quantum of packed data and mathematically determining from the ADPCM compression to the threshold value of establishing in advance of the digital data conversion of G.723 compression subsequently.Owing to provide the parameter of specified compression degree according to the compression needs of standard G.723, can adjust according to the digital data compression of standard G.723, it is compared with μ Law compressed digital-data, the data volume that is reduced be 15: 1 so much.During compressed digital-data, data hereof carry out computer program that ADPCM compression back CPU carries out filename from *.AU change into *.ADP, data hereof G.723 compress the back filename from *.ADP change into *.723, if file will promptly further be compressed according to the CELP standard according to standard G.728, filename from *.723 change into *.728.
As well known to those skilled in the art, the numerical data basis G.723 compression of standard is lossy, promptly G.723 compresses the tonequality of having given up for the audio frequency that decompresses and understands unessential data and keep prior data on the tonequality.Therefore, along with the second background computer program is used G.723 compression and the raising of to digital data compression, the quality of the sound signal of resetting from compressed digital-data G.723 reduces.Practical experience shows that in general the sound signal of resetting from the numerical data that surpasses compression in 6: 1 is compared with μ Law compressed digital-data provides the unsatisfied audio quality of people more in addition.
How the histogram of Fig. 3 reduces the required memory space of certain amount of data by further compression μ Law compressed digital-data with the diagrammatic representation digital computer program.In Fig. 3, the quantity of the μ Law packed data that the computer program that post 72 expression CPU carry out transmits to RAM from CODEC and fifo circuit 48 for example is used for the whole μ Law packed data of talking through the telephone that is received through an input channel of digital logger 10 by input signal regulating circuit 42.The first background computer program is fetched μ Law packed data with post 72 representative from hard disk 56 after, shown in the arrow among Fig. 3 74, by being ADPCM form and to digital data conversion further with its compression.After being converted to the ADPCM form, the amount of compressed digital-data is with 76 expressions of the post among Fig. 3.After numerical data had been compressed to the ADPCM form, second background computer program basis is the further once more compressed digital-data of standard G.723, shown in the arrow among Fig. 3 78.According to standard compression G.723 to come playback G.723 behind the tolerance level of packed data with acceptable audio quality, the amount of numerical data is represented with post 82 in Fig. 3.
Compare up to stereosonic traditional audio user CD record format of 74 minutes with being used for CD single storage, CD-R or CD-RW can store about 1260 minutes, i.e. the monophony μ Law compressed digital-data of 21 input channels hour.Numerical data is compressed to the ADPCM compression from μ Law further compression has reduced about 1/2 to the amount of the required compressed digital-data of record particular telephone talks.With degree shown in Figure 3 numerical data from the further boil down to of ADPCM form G.723 form once more the amount of the required compressed digital-data of headphone talks has been reduced about 1/2.Therefore, after compression G.723, the required ADPCM compressed digital-data of headphone talks approximately is 1/4 to 1/5 of the μ Law compressed digital-data that is used to talk through the telephone.The hard disk 56 of current preferred 47GB can be stored the voice data according to about 6500 input channels of standard compression G.723 hour.
Although do not carry out in the currently preferred embodiment of digital logger 10, G.723 compressed digital-data also can be compressed according to standard G.728, shown in arrow among Fig. 3 84.Numerical data makes the total amount of compressed digital-data drop to quantity with 86 representatives of the post among Fig. 3 according to the further compression of standard G.729, its approximately be μ Law compressed digital-data required 1/6 to 1/8.Current the storage that is used for according to the compression of standard G.729 on hard disk 56 for digital logger 10 and not preferred, because further data are made current preferred CPU overload from the processing that form G.723 is compressed to form G.729 and needs, be no more than 13000 input channels hour but may hour bring up to the memory capacity of 47GB hard disk 56 from 6500 input channels.But, providing enough performance if be included in the CPU of digital logger 10 to allow numerical data further to be compressed according to standard G.728, the data volume that is stored in so on the hard disk 56 can be enhanced by using this further compression.
Except that hard disk 56, digital logger 10 also allows to use the numerical data of optical disc recorder 28 recording compressed as illustrated in fig. 1 and 2 on the archives optical recording media.For allowing that compressed digital-data is sent to optical disc recorder 28, digital logger 10 comprises small computer system interface (" the SCSI ") bus 92 that optical disc recorder 28 is connected in scsi host adapter 94.Scsi host adapter 94 is also connected to processor bus 54 to communicate by letter with RAM circuit 52 with CPU, ROM.No matter when digital logger 10 has been finished the accumulation of the G.723 compressed digital-data of about 21 input channels hour on hard disk 56, one detects that state, and computer program begins on CD-R, CD-RW, DVD-R or the DVD-RW archives optical recording media in optical disc recorder 28 data that record most recent automatically receives.
In principle the computer program carried out of CPU, ROM and RAM circuit 52 can use above-mentioned any packed data form from the digital data record of the simulating signal compression that receives through input channel jack 44a-44d by input signal regulating circuit 42 on the archives optical recording media.Be packed data can be registered as μ Law compression on this archives optical recording media numerical data, the numerical data of ADPCM compression, the numerical data of G.723 compression or the numerical data of G.728 compressing.But, for playback compressed digital-data simply after being recorded on the archives optical recording media, the digital logger 10 preferred μ Law packed format record numerical datas of using.The mode that utilization describes below is with the playback on the personal computer of the sound generating system that comprises the SoundBlaster sound card compatibility of selling with the Creative Technology company of Singapore easily of the numerical data of μ Law packed format record to the archives optical recording media.For example, with this format record single talk through the telephone can use comprise the SoundBlaster compatibility sound generating system and any personal computer of Windows Media Player computer program with Microsoft mounted thereto by playback easily.
In the digital data record of using optical disc recorder 28 beginnings that μ Law is compressed before on the archives optical recording media, the master of the data that the computer program preparation that CPU carries out will be recorded is pre-to be made and during the pre-data of making of preparation master, the pre-data of making of master temporarily is stored on the hard disk 56.Master is pre-to be made when being used for carrying out dossier by optical disc recorder 28 in that compressed digital-data is carried out, G.723 be recorded in single talking through the telephone on the hard disk 56 after the standard compression for previous basis, the computer program that CPU carries out is by decompressing the numerical data of compression continuously and above-mentioned data compression process being reversed.Decompression according to the numerical data of standard compression G.723 produces the ADPCM compressed digital-data.After obtaining an ADPCM compressed digital-data of talking through the telephone, the computer program that CPU carries out is condensed to μ Law compressed digital-data to ADPCM compressed digital-data decompress(ion) again.But since from the ADPCM compressed digital-data to being lossy according to the compression of the numerical data of standard compression G.723, at the master of compressed digital-data is pre-being used to of producing during making use optical disc recorder 28 is recorded on the archives optical recording media μ Law compressed digital-data, with compare with the corresponding μ Law compressed digital-data that fifo circuit 48 is sent to the RAM of CPU, ROM and RAM circuit 52 from CODEC at first, almost always different and have a lower audio quality.
Be made of one group of file the pre-compressed digital-data of making of the master of digital logger 10 preparations by this way, each file comprises the numerical data that is used for the single phone talks that input signal regulating circuit 42 receives through one of input channel jack 44a, 44b, 44c and 44d.The file that comprises the μ Law packed data that is used for each input channel was assigned to catalogue before being recorded to the archives optical recording media.Shown in following table 1, top each input channel to digital logger 10 that is used for the directory tree structure of the pre-data of making of master is specified independent catalogue.In the catalogue of each input channel, every day, the data that will be recorded on the archives optical recording media to that input channel generated sub-directory.Be assigned to the time that namelist registration word logger 10 opening entries of each file are talked through the telephone.During the pre-making of master, thereby the filename that is assigned to each numerical data of talking through the telephone is arranged each continuous file with ascending order and is had greater than previous title, thereby consistent with ISO (International Standards Organization) (" ISO ") ISO-9660 switching stage 1 (the MS-DOS compatibility).
Table 1
Passage 1 Passage 2 Passage 3 Passage 4
?????19980601 ?????19980601 ?????19980601 ?????19980601
?212450.AU ?233742.AU ?224307.AU ?205015.AU
?225212.AU ?????19980602 ?231827.AU ?????19980602
?????19980602 ?005023.AU ?235218.AU ?010709.AU
?002357.AU ?022305.AU ?????19980602 ?015023.AU
?011506.AU ?025048.AU ?003224.AU ?022357.AU
?032536.AU ?031706.AU ?010746.AU ?024753.AU
?034527.AU ?030623.AU
?034702.AU
The example of above-mentioned proposition describe be used for some on June 1st, 1998 and other on June 2nd, 1998 talking through the telephone of on all 4 input channels, receiving be recorded on the dossier medium, the master of the compressed digital-data that is undertaken by digital logger 10 is made in advance.For the passage 1 on June 1st, 1998, digital logger 10 masters make in advance compressed digital-data be used for respectively in the afternoon talking through the telephone of 9: 24: 50 and 10: 52: 12 beginning be recorded in the dossier medium.For the passage 4 on June 2nd, 1998, digital logger 10 masters are made compressed digital-data in advance to be used for being recorded in the archives optical recording media talking through the telephone of 1: 7: 9 morning, 1: 50: 23,2: 23: 57,2: 47: 53,3: 6: 23 and 3: 47: 2 beginning respectively.
Because all filenames of appointment when compressed digital-data being recorded on the archives optical recording media comprise file extension " AU ", with the sound generating system that comprises the SoundBlaster compatibility, the Win95 of Microsoft, 98 and NT operating system under this file of personal computer playback of Media Player computer program that operate and that have the Microsoft that is installed on it only need with pointing device " click " filename.In case select the file that its filename comprises the AU extension name with pointing device, the operating system of Microsoft gets started execution MediaPlayer computer program and handles the file of appointment, thereby causes that storage μ Law compressed digital-data hereof is by the horse back playback.
The computer program of carrying out at CPU is finished the master of compressed digital-data is made in advance with after being used to be recorded on the archives optical recording media, it master in advance the compressed digital-data of making copy optical disc recorder 28 to from hard disk 56.In order to ensure the pre-compressed digital-data of making of master is successfully copied to optical disc recorder 28 from hard disk 56, the key character of digital logger 10 is to use independently ATAPI host adapter 62 and scsi host adapter 94.Fetch the pre-compressed digital-data of making of master from hard disk 56 respectively when independently the use of ATAPI host adapter 62 and scsi host adapter 94 allows to continue at the same time to write down and is sent to optical disc recorder 28 by talking through the telephone of receiving of input signal regulating circuit 42 with the pre-compressed digital-data of making of master.Independently the use of ATAPI host adapter 62 and scsi host adapter 94 greatly reduces the transient delay of fetching the data from hard disk 56 optical disc recorder 28 is in time received in order to be recorded in the possibility of the issuable interference of data on the archives optical recording media.
Finish master after the pre-compressed digital-data of making copies optical disc recorder 28 to from hard disk 56 at the computer program that CPU carries out, computer program can reach the carriage of the optical disc recorder 28 that is loaded with the archives optical recording media that writes down at that time outside the front panel 12 automatically.It is exactly to notify the pre-compressed digital-data of making of operator's master of digital logger 10 to be recorded on the archives optical recording media that the carriage of optical disc recorder 28 is ejected.The automatic ejection of the carriage of optical disc recorder 28 also reminds the operator to replace the medium of record so that digital logger 10 is ready for the next archives optical recording period with new blank archives optical recording media.
It will be apparent to those skilled in the art that, after the talking through the telephone of about 6500 input channels that write input regulating circuit 42 receives hour, the available space that is used for headphone talks on hard disk 56 sooner or later will be fully occupied at utmost attainable according to the numerical data of standard compression G.723.When this happens, can make computer program that CPU carries out comprise the file of talking through the telephone of old record and recover space on the hard disk 56 with record talking through the telephone in the future by deletion.
As shown in Figure 2, digital logger 10 can also comprise digital logger 10 and LAN (Local Area Network) (" LAN ") or wide area network (" WAN ") 98 network interface circuits that are connected 96.Shown in the figure among Fig. 4, the network interface circuit that comprises 96 allows digital logger 10 and other workstation1 02 or the digital logger 10 that also is connected in LAN/WAN 98 to carry out electronic communication.The particular characteristics of network interface circuit 96 largely is to be determined by the characteristic of LAN/WAN 98.For example, if LAN/WAN 98 is Ethernet or 10Base-T LAN (Local Area Network), network interface circuit 96 will be suitable network interface unit (" NIC ").But if LAN/WAN98 is the Internet, network interface circuit 96 may be serial ports and modulator-demodular unit or some other suitable circuit so, be used for communicating by letter with Internet service provider (" ISP ").Under special circumstances, network interface circuit 96 even can allow directly to be connected with the point (point ofpresence) (" POP ") that exists of the Internet main line.
The real time operating system that is included in the digital logger 10 comprises the TCP/IP stack, i.e. RT-IP, and it is the public domain source code that is used among BSD Unix and the Linux.Therefore, digital logger 10 comprises and allow to use ICP/IP protocol through the Internet and at the software of LAN such as Ethernet or 10Base-T communication.
Use LAN or WAN communication, being authorized to visit the specific individual who writes down that talks through the telephone can fetch it in workstation1 02 playback that is positioned at away from digital logger 10 from digital logger 10.Numeral logger 10 is comprising the specific file of talking through the telephone sends requirement to the current compressed format that is stored on the hard disk 56 of file wherein workstation1 02.Therefore, according to the compressed degree of talking through the telephone, workstation1 02 may be decompressed to the ADCPM form to file from form G.723 before playback is talked through the telephone, and then file further was decompressed to μ Law form from the ADCPM form.
Also allow optical disc recorder 28 is assigned to place away from the remainder of digital logger 10 by LAN and/or WAN communication being increased to digital logger 10.The placement permission so a kind of tissue of optical disc recorder 28 away from the remainder of digital logger 10, it has the office's (for example resembling the financial institution of securities broker company) that is distributed in the wide geographic area, and wish to be recorded in talking through the telephone that each office receives, its digital logger 10 is installed in a position and logon workstations 104 is installed to each office, as shown in Figure 4.The preferred digital loggers 10 with Fig. 2 of logon workstations 104 have same structure, comprise network interface circuit 96 and omit optical disc recorder 28, scsi host adapter 94 and only for operating some button 16,18 or 22a-22c that optical disc recorder 28 needs.
In the digital logger 10 and logon workstations 104 of this network installation, be included in computer program that CPU, the ROM of logon workstations 104 and the CPU in the RAM circuit 52 carry out and periodically the compressed digital-data to the encryption of circuit protocol be sent to digital logger 10 cause optical disc recorders 28 records through LAN/WAN 98.When only recording the compressed digital-data that receives from logon workstations 104 on the archives optical recording media, digital logger 10 is only as the pre-digital logger register of making 106 of master.That is, under this operational circumstances, digital logger 10 is operated as being similar to the unit that the digital logger 10 among Fig. 2 constructs, but omits input channel jack 44a-44d, input signal regulating circuit 42 and CODEC and fifo circuit 48 at least.
Master is pre-to be made and uses optical disc recorder 28 and be recorded on the archives optical recording media each talk through the telephone except that processing is used for, digital logger 10 also allow the operator record receive by an input channel of digital logger 10 talk through the telephone during monitor.For listening to when headphone is talked, the operator of digital logger 10 uses input channel selector switch 32 to select the input channel of digital logger 10.As shown in Figure 2, CODEC and fifo circuit 48 offer input channel selector switch 32 to the simulating signal that its each CODEC produces.The simulating signal that is used for the input channel of input channel selector switch 32 selections is provided for the input end of the amplifier 112 that is included in digital logger 10 then, and μ Law compressed digital-data is sent to CPU, ROM and RAM circuit 52 by the computer program that CPU carries out from CODEC and fifo circuit 48 simultaneously.Numeral logger 10 also comprises loudspeaker 114, is not inserted into and fetches jack 36 if fetch plug, and it receives output signals from amplifier 112.Thereby amplifier 112 is controlled 34 electric signal that receive from the playback volume and is adjusted the sound size of fetching generation that the gain of amplifier 112 allows operator's control to fetch jack 36 by loudspeaker 114 or insertion.Input signal regulating circuit 42 and CODEC and fifo circuit 48
The block diagram of Fig. 5 specifically illustrates only input signal regulating circuit 42x and CODEC and the fifo circuit 48x that is used for four identical input channels that 48 pairs of digital loggers 10 of input signal regulating circuit 42 and CODEC and fifo circuit provide.In the typical input signal regulating circuit 42x shown in Fig. 5, the analog telephone signal that receives from typical input channel jack 44x is connected to the input end of traditional circuit interface circuit 422.Line interface circuit 422 comprises having the high-impedance transformer 4222 of primary coil that automatic reformation telecommunications grade (automatic-reforming telecom-grade) capacitor 4224 is connected in series in 2 signal lines of input channel jack 44x.A terminal of the secondary coil of transformer 4222 is connected in grounding circuit, and another terminal of this coil is connected in series in capacitor 4226.Limiter diode network 4228 is connected between the secondary coil and the junction between the capacitor 4226 of grounding circuit and transformer 4222.Transient current does not appear in the circuit on the second coil side of diode network 4228 protection transformers 4222.Therefore line interface circuit 422 provide from traditional telephone system (among any figure, all describing) offer the analog telephone signal of digital logger 10 with other circuit that is included in digital logger 10 between the electricity isolation.The output of the line interface circuit 422 of capacitor 4226 offers analog telephone signal the automatic level control circuit 424 that is also included among the input signal regulating circuit 42x.
Automatic level control circuit 424 provides automatic gain control (" AGC ") with peak detection circuit 426 to the typical input signal regulating circuit 42x described in Fig. 5.As shown in Figure 5, the output of automatic level control circuit 424 offers analog telephone signal and handles this signal to produce the peak detection circuit 426 of gain control signal.The output of peak detection circuit 426 is imported through the gain control that gain control signal circuit 428 sends back automatic level control circuit 424, and the output signal that input signal regulating circuit 42 is produced remains on the intensity of substantial constant.Except analog telephone signal being offered the peak detection circuit 426, automatic level control circuit 424 also offers VU meter 26 to the circuit of that signal in VU meter signal bus 432.Automatic level control circuit 424 and peak detection circuit 426 are preferably provided by MC2830S microphone-type automatic electric-level control (" ALC ") integrated circuit with built-in voice activation switch (" VOX ") that the Motorola Inc. of the Schaumburg of Illinois makes.
Peak detection circuit 426 offers the adjusting analog signal lines 46x of analog telephone signal through regulating analog signal bus 46 that being used to of being regulated by input signal regulating circuit 42x is converted to compressed digital-data the input of typical CODEC and fifo circuit 48x shown in Figure 5.And peak detection circuit 426 also sends the VOX signal as numeral " off-hook " signal to be included in the CPU in CPU, ROM and the RAM circuit 52 interruption 12 through off hook signal circuit 434.Owing to will more specifically explain below, the computer programs process off hook signal comes start and stop record when the input channel jack 44x of digital logger 10 through being suitable for writing down receives simulating signal.
If digital logger 10 receives traditional analog telephone signal fully through input channel jack 44x, so digital logger 10 can comprise line interface circuit 422, the handled signal of computer program that provides CPU to carry out himself is provided determines the beginning of talking through the telephone and the ability of end, as U.S. Patent No. 4,549,047 is disclosed such.But, for some telephone device, especially those in the emergency service center (as " 911 " center "s or in the airway traffic control facility) telephone device, digital logger 10 does not receive fully traditional analog telephone signal.On the contrary, under a lot of situations at emergency service center, the input signal jack 44x of digital logger 10 receives " dry type " (dry) analog telephone signal, and it has omitted some signal that occurs in traditional fully analog telephone signal.For example, this dry type analog telephone signal lacks " jingle bell " signal that occurs in traditional fully analog telephone signal.Emergency service center (as 911 centers) thus receive the dry type analog telephone signal after the beginning of talking through the telephone, emergency center keeps listening to the ability of the simulating signal that the phone by originating call transmits, even in fact this phone is hung up.Because digital logger 10 must can write down all through conventional telephone line or the communication that receives through the dry type telephone line, the proper operation of the digital logger 10 of signal controlling that can't in all operations environment, produce by line interface circuit 422.
Be the computer program that provides signal to carry out to CPU through off hook signal circuit 434, preferred peak detection circuit 426 offers bandpass filter and the band notch filter that is included in the peak detection circuit 426 to the simulating signal that receives from automatic level control circuit 424.It is overlapping to the 3000Hz that the trap band of the passband of bandpass filter and band notch filter is 500Hz in the whole frequency range of voice.When representing that from the output signal of two wave filters simulating signal that peak detection circuit 426 receives from automatic level control circuit 424 comprises the audio frequency with sufficient intensity, peak detection circuit 426 offers computer program to the off hook signal circuit 434 of a signal through representing that state.
And when start and stop record, computer program is also to carrying out filtering from peak detection circuit 426 through the signal that off hook signal circuit 434 receives.Therefore, before opening entry, the signal that CPU receives through off hook signal circuit 434 must be represented the existence to the continuous sound signal of some time interval.If digital logger 10 is just receiving telephone communication, must represent to have 0.5 second continuous sound signal to exist at the signal that on off hook signal circuit 434, occurs before the start-of-record so.But,, must represent only to have 0.1 second continuous sound signal to exist at the signal that on off hook signal circuit 434, occurs before the opening entry so if digital logger 10 is just receiving airway traffic control communication.Similarly, in case start-of-record, the signal that computer program receives through off hook signal circuit 434 before record stops must to be represented not exist in the continuous sound signal of some time interval.If digital logger 10 positive headphone communications, the expression that occurs on off hook signal circuit 434 does not exist the signal of 15.0 seconds continuous sound signal to make end record so.But if digital logger 10 is just writing down airway traffic control communication, the signal that occurs on off hook signal circuit 434 before end of record (EOR) must be represented not exist so only 0.2 second continuous sound signal.
As mentioned above, the peak detection circuit 426 of input signal regulating circuit 42x provides analog telephone signal to bring in to the input that is included in the CODEC 482 in CODEC and the fifo circuit 428 and is converted to numerical data.CODEC 482 preferably model is that the model that the AKM semiconductor company in the Santiago in California makes is the four line telecom coding demoders of AK2304, and it handles each simulating signal that receives by 4 input channels of digital logger 10 simultaneously.When the analog telephone signal that receives was converted to digital signal, CODEC 482 produced the Analog signals'digital data of representative with the data rate reception of the every input channel 64KB of per second, and this numerical data is used aforesaid μ Law compression.
The numerical data of μ Law compression is transmitted to the input of serialiser/deserializer (" SERDES ") 484 from the output of CODEC 482 as serial bit stream.SERDES 484 is converted to serial bit stream by 8 bit data word of parallel transfer to FIFO 486.FIFO 486 is preferably by the Integrated Device Technology of the Santa Clara in California, the IDT7206 model that Inc. makes.
Digital logger 10 opening entries receive by input channel talk through the telephone before, FIFO 486 computer program when off hook signal circuit 434 receives the signal of the positive received audio signal of expression input signal regulating circuit 42x accumulation from the digitalized data of talking through the telephone.After computer program decision beginning recorded digital logger 10 to specific input channel, it began treated device bus 54 and fetches the RAM that μ Law compressed digital-data also stores the numerical data of compression into CPU, ROM and RAM circuit 52 from the FIFO 486 that is used for this input channel.The use of FIFO 486 has avoided being lost in the important telephone communication that the telephone rings signal arrives before, as caller ID position and telephone number sign.When digital logger 10 was talked to two or more input channel headphones simultaneously, the processor bus 54 of computer program through cycling through the input channel that is write down one by one that CPU carries out fetched μ Law compressed digital-data from FIFO486.
Except that the analog telephone signal that digitizing receives,, be included in each CODEC 482 that regulates among the analog signal bus 46x and also μ Law compressed digital-data changed back simulating signal at reasonable time.Therefore, when operator's playback of digital logger 10 write down talk through the telephone the time, the computer program that CPU carries out sends back CODEC 482 to μ Law compressed digital-data to be converted to simulating signal by FIFO 486 and SERDES 484.As mentioned above, CODEC 482 offers input channel selector switch 32 to the simulating signal that produces from μ Law compressed digital-data.The operation of numeral logger 10
When energized, digital logger 10 at first moves Power-On Self-Test (POST) operation among the ROM that is stored in CPU, ROM and RAM circuit 52.After finishing the POST operation, " state shows (the STATUSVIEW) " panel shown in digital logger 10 usefulness Fig. 6 of proper operation is presented at its current state on the LCD 24.STATUS VIEW panel Chinese version top line is indicated to each input channel of digital logger 10 and logins the quantity of talking through the telephone.Text second row is indicated the number percent of the hard disk 56 that is used at present and is needed how many CD-R on the file optical recording medias that are recorded in particular type of talking through the telephone of all logins.Whether the third line designation number logger 10 of text is movable.The indication of text fourth line is recorded in Start Date of talking through the telephone the earliest and the time on the hard disk 56 now, and what follow later is present date and time.In 10 operating periods of digital logger, additional state and information may appear on the STATUS VIEW panel.Warning can appear in the message demonstration of the second row right-hand member.If digital logger 10 needs operator intervention, operator prompting's symbol appears at and is close to the below that message shows, that is, and and the right-hand member of STATUS VIEW panel the third line.
At the digital logger 10 of energized at first is inactive, and during the talking through the telephone of login input, and activates digital logger 10 and logins and talk through the telephone as long as the operator of so digital logger 10 presses beginning/stop button 16.If digital logger 10 has just been connected power supply, after having passed through a free time able to programme, digital logger 10 brings into operation, just as the operator has pressed beginning/stop button 16.
When being inactive after the energized and then at digital logger 10, or whenever talking through the telephone of login is not write on the file optical recording media at digital logger 10, the operator can press and enter/withdraws from setup menu (Enter/Exit Setup Menu) button 22a " SETUP MENU (the setup menu) " panel shown in Fig. 7 manually is presented on the LCD 24, or remove from LCD 24.When SETUP MENU panel appeared on the LCD24, the operator can utilize the next option (Next Option) button 22b and select option (Select Option) button 22c to move through the tabulation of each option of the digital logger 10 that shows on the LCD 24.Press the next option button 22b and move choice menus item tabulation upwards by being positioned at text the third line of showing on the LCD 24 Symbol.Press and select OptionButton 22c to select to be close to now text the third line of showing on the LCD 24
Figure A0010343700312
The menu item on the symbol right side.Show the menu item complete list that may be displayed on the SETUP MENU panel below.
OPTIONS (option)
SET TIME (setting-up time)
MAINTENANCE (maintenance)
DISCWARE (optical-disc device)
ABOUT (about)
GO BACK TO PREVIOUS MENU (menu before returning)
Demonstration SETUP MENU panel will be forbidden beginning/stop button 16 and hot burning button 18 on LCD 24.
When the operator of digital logger 10 enters/withdraw from setup menu button 22a by pressing SETUP MENU panel is presented on the LCD 24, and when utilizing the next option button 22b to select OPTIONS with the list of menu of the SETUP MENU panel of selecting OptionButton 22c to list from above subsequently, " OPTIONS MENU (the options menu) " panel shown in Fig. 8 appears on the LCD 24.When if next the operator has selected SETUPCHANNEL MODE (setting up channel pattern) with the next option button 22b and selection OptionButton 22c from the list of menu of OPTIONS MENU panel, will be to each independent of specifying in 3 kinds of select operating modes in 4 input channels of digital logger 10.3 kinds of possible operator schemes that the operator can be assigned in 4 input channels each have been listed below.
OFF forbids the input channel of appointment.
VOX begins/and stop button 16 starts or stops digital logger 10, because of
This is according to beginning able to programme and stop to postpone start and stop record and refer to
Decide the sound that input channel receives.
Therefore MAN manual operation---beginning/stop button 16 controlling recording, digital logger 10 write down the simulating signal of specifying the input channel reception continuously, or record not.
Therefore, by navigating in the SETUP CHANNEL MODE panel that utilizes the next option button 22b and select OptionButton 22c on LCD 24, to show, the operator can start one or more input channels of digital logger 10 as the operator scheme of each this input channel by specifying VOX, and login is talked through the telephone automatically.By this way, utilize SETUPCHANNEL MODE panel, each independent input channel that can forbidden digit logger 10, maybe can programme with continuous recording or when the input channel of digital logger 10 receives enough strong simulating signal record.For those input channels of programming with any one mode in the above-mentioned dual mode with the digital logger 10 of headphone talks, the operator utilize the next option button 22b and select OptionButton 22c to turn back to SETUP MENU panel and press subsequently enter/withdraw from setup menu button 22a and withdraw from SETUP MENU panel after, one after the other press the record that beginning/stop button 16 alternately starts or stops digital logger 10.If digital logger 10 logining talk through the telephone in the operator press beginning/stop button 16, numeral logger 10 stops login talking through the telephone, and is coming synchronization to be used for the file system of the file of management accounts on hard disk 56 to the All Files of store compressed numerical data wherein by the program of shutting down computer always.
As mentioned above, if the file optical recording media is present in the optical disc recorder 28, and digital logger 10 is finished the compressed digital-data that has accumulated about 21 passages hour on hard disk 56, can allow computer program automatically to begin the data recording of up-to-date reception to the recording medium that is present in the optical disc recorder 28.As selection, the operator of digital logger 10 can be at any time, even to talk through the telephone for login at digital logger 10 be inactive time, starts by pressing hot burning button 18 that masters are pre-to be made and the process of recording compressed numerical data.In some cases, it may be favourable manually booting pre-making of master and recording process, for example, if under the situation of talking through the telephone of specific time file login every day.The operator of numeral logger 10 can abandon pre-making of master and recording process by pressing hot burning button 18 simultaneously and entering/withdraw from setup menu button 22a at any time.
If logining the power supply that the operator utilizes on/off switch 14 to cut off digital logger 10 when talking through the telephone at digital logger 10, the computer program that CPU carries out is at first brought down stocks hard disk 56 being arranged in the data of high-speed buffer that computer program is used for optimizing the RAM of digital logger 10 performances, closes digital logger 10 then.Equally, if numeral logger 10 is just in initialization or updating file system when the operator closes on/off switch 14, the computer program that CPU carries out will be finished those operations earlier before closing digital logger 10.In most of the cases, the operation of so far illustrated digital logger 10 provides all functions that the operator needs usually.But digital logger 10 also provides below the operator of explanation usually only in digital logger 10 installation processes or the additional option that is provided with that uses after installing of and then digital logger 10.
The operator of numeral logger 10 can select the SETTIME item from SETUP MENU panel, and the SET TIME panel shown in Fig. 9 is appeared on the LCD 24.SET TIME menu item allows operator's setting of digital logger 10 to be included in current time and the date that the clock IC in the digital logger 10 keeps.If be included in the battery failure of electric energy being provided for clock IC work in the digital logger 10, this option will appear on the LCD 24 automatically when digital logger 10 energized so.After SET TIME panel appeared on the LCD 24, the operator utilized the next option button 22b and enters/withdraw from setup menu button 22a and sets the current time.Press and enter/withdraw from setup menu button 22a and move the cursor that is presented on the LCD 24, a numeral connects one digitally by the time and date field, with the field of selecting to change.Pressing the next option button 22b increases the value of selected numeral.Press and select OptionButton 22c that time and date is recorded clock IC and the demonstration of SETUP MENU panel is returned on the LCD 24.
Illustrated as the front, and can select to make the MENU of OPTIONS shown in Fig. 9 panel to appear at OPTIONS MENU item on the LCD 24 from the operator of SETUP MENU panel numeral logger 10.The operator of numeral logger 10 can use the OPTIONSMENU panel to influencing the parameter programming of digital logger 10 operations.Numeral logger 10 is with the default value pre-programmed of these parameters of the proper handling that digital logger 10 in most cases is provided.The abnormal operation condition may need to change some in these parameters.
Similar to SETUP MENU panel, when OPTIONS MENU panel appears at LCD24 and goes up, press the next option button 22b and move the tabulation of choice menus item upwards by being arranged in text the third line of appearing on the LCD 24 Symbol.Press text the third line of selecting OptionButton 22c to select and then to appear to show on the LCD 24 The menu item on the symbol right side.Show the complete list that may be displayed on the menu item on the OPTIONS MENU panel below.
PHONE CALL START TIMEOUT (call begins overtime)
PHONE CALL STOP TIMEOUT, (call stops overtime) ASSIGN INPUT CHANNEL LABELS, (specifying the input channel label) SETUP CHANNEL MODE, (setting up channel pattern) SET CD-R WRITE SPEED, (setting the CD-R writing rate) AUTO EJECT, (ejecting automatically) LOGGING AUTOSTART TIMEOUT, (login starts overtime automatically) SOUND ENABLED, (sound permission) COMPRESSION LEVEL TRIGGER, (hierarchy compression trigger) SET IP ADDRESS, (setting the IP address)
ERASE OLD CALLS IF DISK 90%FULL (if disk 90% is wiped old calling when expiring)
RESTORE LOGGER TO DEFAULT SETTINGS (logger is returned to default setting)
GO BACK TO PREVIOUS MENU (menu before returning)
Off hook signal must exist in the duration interval on the off hook signal circuit 434 before the computer program opening entry that the operator selects PHONE CALL START TIMEOUT menu item to carry out with change CPU was talked through the telephone.For the headphone talks, this time interval generally should remain on its default value, about 0.5 second.
The operator selects PHONE CALL STOP TIMEOUT menu item to stop the duration interval that must there be off hook signal before in the headphone talks with the computer program that changes the CPU execution.Be the headphone talks, it generally remains on its default value, about 15 seconds.The duration that increases PHONE CALL STOP TIMEOUT parameter will be avoided talking through the telephone and generate two or more files.Only find to talk through the telephone when being recorded in the file more than 1, just should change this parameter the operator.If the duration is long, exist two to talk through the telephone and be recorded in a possibility in the single file so.
If a device comprises a more than digital logger 10, each that discern uniquely when record file optical recording media so in 4 input channels of each digital logger 10 is favourable.The operator of numeral logger 10 by select ASSIGN INPUTCHANNEL LABELS menu item can any optional 2 digital channels number be assigned to the front on the file optical recording media, write down in the top name of directory tree structure shown in the table I of use.Utilize to give from the record of each input channel of each the digital logger 10 in the device that comprises two or more digital loggers 10 specify the ability of 2 unique digital channels number to reduce to fetch with the talks of playback particular telephone in ambiguity and confusion.
The operator of numeral logger 10 changes SET CD-R WRITE SPEED menu item and to change optical disc recorder 28 compressed digital-data is recorded speed on the file optical recording media.The 1x that provides at optical disc recorder 28 is provided SET CD-R WRITE SPEED menu, selects in the such writing rate of 2x or 4x.
The operator of numeral logger 10 change AUTO EJECT menu item with start or be closed in the file optical recording medium and finish after automatic ejection.Forbid that AUTO EJECT option will make digital logger 10 that the file optical recording media is retained in the optical disc recorder 28, up to the operator manually with its ejection.
The operator of digital logger 10 changes LOGGING AUTOSTART TIMEOUT menu item and begins the time interval in past before automatically to change the record of talking through the telephone after digital logger 10 power supplys of connection.For the automatic startup of forbidden digit logger 10, the operator gives LOGGING AUTOSTART TIMEOUT zero (0) value.
The operator of numeral logger 10 can change SOUND ENABLED menu item and produce the chimes of doom that can hear to prevent digital logger 10, thereby can alleviate bothering of operator.
The operator of numeral logger 10 changes COMPRESSION LEVEL TRIGGER menu item and starts the number percent that further compression is stored in two kinds of used background computer programs of numerical data on the hard disk 56 hard disk 56 that must use before any one to change at the computer program that CPU carries out.In most of the cases, this threshold setting is 80%.Further compressed digital-data hour is brought up to about 6,500 input channels hour to the writing time of 21GB hard disk from about 1,600 input channel.The operator of numeral logger 10 can be by being set at the value of COMPRESSION LEVEL TRIGGER the further compression of zero (0) forbidden digit data.
The operator of numeral logger 10 uses SET IP ADDRESS menu item to give digital logger 10 1 TCP/IP addresses, and this address is that the Web server function that the real time operating system of CPU execution provides needs through LAN/WAN 98 and workstation1 02 and/or logon workstations 104 signal posts.
The operator of numeral logger 10 sets ERASE OLD CALLS IF DISK 90%FULL menu item, if so that 90% the writing and allow to wipe talking through the telephone the earliest when full of hard disk 56.Its default setting forbids wiping talking through the telephone the earliest.If do not wipe talking through the telephone the earliest, when hard disk 56 was filled, the operation of digital logger 10 stopped.
The operator of numeral logger 10 selects RESTORE LOGGER TO DEFAULTSETTINGS menu item to recover the default value of all operations parameter.
Numeral logger 10 also can comprise as option can use CODEC and fifo circuit 48, input channel selector switch 32, amplifier 112, playback volume control 34, the ability of talking through the telephone of loudspeaker 114 and earphone socket 36 playbacks.If digital logger 10 does not have this optional feature, the personal computer that typically uses any suitable equipment so is by comprising the file of talking through the telephone and carry out talking through the telephone of playback from file optical recording media playback or by fetching from digital logger 10 with LAN/WAN 98.But, also can equip digital logger 10 talking through the telephone with playback.In order to allow in the talks of digital logger discharge 10 last times words, except CODEC 482, outside SERDES 484 and the FIFO 486, each CODEC and fifo circuit 48x must also comprise the 2nd FIFO and SERDES, and the computer program that CPU carries out sends back CODEC 482 to μ Law compressed digital-data through the 2nd FIFO and SERDES.When the talking through the telephone of playback, the computer program that CPU carries out decompresses the particular telephone talks from it is recorded in form on the hard disk 56, obtaining μ Law compressed digital-data, and μ Law compressed digital-data is sent to the CODEC of specific input channel.Then, CODEC decoding μ Law compressed digital-data produces the simulating signal that offers input channel selector switch 32.
If the hardware of having equipped digital logger 10 with allow as last paragraph described in the talking through the telephone of playback, the list of menu of front OPTIONS MENU panel has increased PLAYBACK AUDIO menu item so.PLAYBACK AUDIO menu item and its submenu sequence together allow the operator to select talking through the telephone of a specific former record of playback.When the operator of the digital logger 10 of suitable equipment selects PLAYBACK AUDIO menu item, occur one make the operator can at first specify one will playback first submenu of the input channel of talking through the telephone of record in the past.The operator utilizes first submenu to select after in 4 input channels 1, second submenu that makes the operator can specify the date of talking through the telephone of former record that will playback occurs.The operator utilizes second submenu to select after the date, occurs one and makes the operator can select three submenu of talking through the telephone of playback at special time record.
When OPTIONS MENU panel appeared on the LCD 24, the operator of digital logger 10 selected GO BACK TO PREVIOUS MENU menu item, turns back to SETUP MENU panel from the OPTIONSMENU panel.
The operator of numeral logger 10 can select MAINTENANCE MENU item from SETUP MENU panel, and the MAINTENANCE MENU panel shown in Figure 10 is appeared on the LCD 24.The operator of numeral logger 10 utilizes the MAINTENANCEMENU panel to carry out important internal affairs work of treatment or carries out the operation that some may influence the logger state.Show the menu item complete list that appears on the MAINTENANCE MENU panel below.
CLEAR FILES (removing file)
EVENT LOG (incident login)
GO BACK TO PREVIOUS MENU (menu before returning)
The operator of numeral logger 10 selects CLEAR FILES menu item with the initialization files system, thereby the All Files of talking through the telephone that writes down before wiping.If power failure causes file system to destroy, can force the operator of digital logger 10 to select CLEAR FILES menu item.
The operator of numeral logger 10 selects EVENT LOG menu item, and the complete EVENT LOG panel that illustrates among Figure 11 is presented on the LCD 24.EVENT LOG panel makes the operator can be by selecting SHOW LOG EVENTS (demonstration log-in events) menu item or CLEAR LOG EVENTS (removing log-in events) menu item to show respectively or the login of scavenge system incident.
When EVENT LOG MENU panel appeared on the LCD 24, the operator of digital logger 10 selected GO BACK TO PREVIOUS MENU (menu before returning) menu item, turns back to MAINTENANCE MENU panel from EVENT LOG MENU panel.
When MAINTENANCE MENU panel appeared on the LCD 24, the operator of digital logger 10 selected GO BACK TO PREVIOUS MENU menu item, turns back to SETUP MENU panel from MAINTENANCE MENU panel.
From SETUP MENU panel, the operator of digital logger 10 can select to make the MENU of DISCWARE shown in Figure 12 (optical-disc device menu) panel to appear at DISCWARE MENU menu item on the LCD 24.The operator of numeral logger 10 utilize the DISCWAREMENU panel safeguard and install all be stored on the hard disk 56, carry out computer program by CPU with the headphone talks.Show the complete list that appears at the menu item on the DISCWARE MENU panel below.
UPDATE DISCWARE FROM CD (upgrading optical-disc device) from CD
ENABLE DISCWARE LOADING (allowing optical-disc device to load)
ABOUT (about)
GO BACK TO PREVIOUS MENU (menu before returning)
The operator of numeral logger 10 selects UPDATE DISCWARE FROM CD menu item, and the CD-ROM from be present in optical disc recorder 28 reads the computer program of renewal, and this computer program is stored on the hard disk 56 to be carried out by CPU.
The operator of numeral logger 10 selects ENABLE DISCWARE LOADING menu item, to allow or to forbid that CPU carries out the current computer program that is stored on the hard disk 56.Forbid computer program will make digital logger 10 when next operation person connects digital logger 10 power supplys automatically the CD-ROM from be present in optical disc recorder 28 read the replacement computer program.If power failure or some other catastrophic failures cause the computer program that is stored on the hard disk 56 to destroy, may force the operator of digital logger 10 to select ENABLE DISCWARE LOADING menu item.
The operator of numeral logger 10 selects the ABOUT menu item, shows the modification of the computer program of carrying out about CPU and is installed in the information of optical disc recorder 28 types in the digital logger 10.When if the operator needs the technical support of digital logger 10, need this information.
When DISCWARE MENU panel appeared on the LCD 24, the operator of digital logger 10 selected GO BACK TO PREVIOUS MENU menu item to make and turns back to SETUP MENU panel from DISCWARE MENU panel.
When SETUP MENU panel appeared on the LCD 24, the operator of digital logger 10 selected GO BACK TO PREVIOUS MENU menu item to make and turns back to STATUS VIEW panel from the SETUPMENU panel.
For described Fig. 1 so far, the digital logger 10 shown in 2 and 5, preferred real time operating system be Jean Labrosse write by R﹠amp; The μ C/OSRTOS that D publishing company publishes.Except μ C/OS RTOS, the operating system software that is used for digital logger 10 also comprises login, that be called RTFS, the real-time file system that can compatible PC/DOS of the EBS company of Massachusetts Groton.Although the combination of this software has allowed to submit to the workstation1 02 of the appropriate password of giving each file or logon workstations 104 restricted accessings to be stored in the file of talking through the telephone that comprises record on the hard disk 56, do not providing encryption to file through this combination of software in the transmission course of LAN/WAN 98.
An alternate embodiment of the present invention and described Fig. 1 so far, the difference of the digital logger 10 shown in 2 and 5 is that talking through the telephone for reception provides 24 input channels.This 24 input channels numeral logger has used the compatible mainboard of the conventional PC that comprises a Pentium (Pentium) III microprocessor.In this alternate embodiment of the present invention, CODEC and fifo circuit 48 are encapsulated on the printed circuit card in the pci bus slot that is inserted in the compatible mainboard of PC.But, because 24 input channel input signal regulating circuits 42 need the same circuits of larger amt, this part of alternate embodiment numeral logger is encapsulated on the separate printed circuit boards that is connected to pci bus CODEC and fifo circuit 48 with flat cable.
This alternate embodiment numeral logger preferably moves the real-time NT operating system of Microsoft; this operating system comprises the password protection for remote document access; be used for through the software of LAN/WAN 98 communication and in through LAN/WAN 98 transmission courses to the encryption of the file of talking through the telephone that comprises specific record.Therefore, except 6 times input channel is provided, alternate embodiment numeral logger can also prevent the unauthorized playback of talking through the telephone, even in the transmission course, the side that transmission is talked through the telephone by unauthorized access intercepts between a digital logger 10 or digital logger register 106 and remote workstation 102 or logon workstations 104.
Though the present invention with reference to preferred embodiment of the present invention explanation, should know this open be illustrative purely, do not mean limitation of the present invention.For example, although digital logger 10 is with the specific embodiment of the talking through the telephone explanation that is specially adapted for logining call and so on, it also can advantageously be applied to such as from being distributed in the file record of other simulated data that a factory or refinery sensor everywhere receives.Although above-mentioned digital logger 10 has used μ Law in the headphone talks, ADPCM and G.723 compression, but other compress technique also can advantageously be applied to the compressed digital analog input signal, for example G.728 and be called the motion picture expert group audio compression technology of MP-3.Although above-mentioned digital logger 10 has used hard disk 56 as impact damper in the compressed digital-data recording process, a high capacity RAM also can be used for same purpose.Therefore, after the explanation on read, those skilled in the art should know without doubt that the present invention can have various changes, modification and/or alternate application, and do not break away from the spirit and scope of the present invention.Therefore, following claim should be understood to comprise that the institute that falls in true spirit of the present invention and the scope changes, modification and alternate application.

Claims (22)

1. the pre-optical recorder of making of a master comprises:
The input signal regulating circuit is used for the simulating signal that the input channel by the pre-optical recorder of making of master receives is carried out electronic control, thereby produces the simulating signal after the adjusting that is suitable for being converted to numerical data;
Code And Decode device (" CODEC ") is connected to described input signal regulating circuit, is used for receiving the simulating signal after regulating and being converted into numerical data from described input signal regulating circuit;
Random access memory (" RAM ") is connected to described CODEC, is used to receive and temporarily store the numerical data that described CODEC produces;
Impact damper is used for from described RAM receiving digital data and with its semipermanent ground storage;
Optical disc recorder is connected to described RAM, is suitable for the pre-digital data record of making of this master to optical recording media; With
CPU (central processing unit) (" CPU ") is connected to described CODEC, described RAM, described impact damper and described optical disc recorder, and described CPU carries out a digital computer program, and the function of this program is:
The operation of the pre-optical recorder of making of monitoring master, be used for: the numerical data of the analogue signal generating that exists on the input channel with described CODEC response light register is sent to described RAM from described CODEC; And subsequently numerical data is sent to described impact damper from described RAM, write down numerical data therein with semipermanent ground;
Periodically fetch the numerical data that semipermanent is recorded in wherein from described impact damper, handle the numerical data fetched so that prepare the pre-numerical data of making of master with a kind of form, this kind form allows the analog signal record of at least 20 input channels that will be received by described input signal regulating circuit hour to optical recording media; With
The pre-numerical data of making of this master is sent to described optical disc recorder, with on the optical recording media of the pre-digital data record of making of this master in the described optical disc recorder.
2. according to the pre-optical recorder of making of the master of claim 1, wherein in order to receive from described RAM and semipermanent ground record numerical data, for described impact damper provides a high capacity RAM.
3. according to the pre-optical recorder of making of the master of claim 1, wherein a read-write direct access storage device device that is connected with described RAM is used for described impact damper from described RAM reception and semipermanent ground record numerical data.
4. according to the pre-optical recorder of making of the master of claim 3, wherein said read-write direct access storage device device by the first bus receiving digital data being stored in wherein, and described optical disc recorder by the second bus receiving digital data that separates with first bus so that it is recorded on the optical recording media.
5. according to the pre-optical recorder of making of the master of claim 1, wherein the digital computer program of being carried out by described CPU side by side will be stored in the described impact damper from the numerical data of two input channel records at least, and in order to prepare to record the pre-numerical data of making of master on the optical recording media numerical data of being stored is classified with input channel.
6. according to the pre-optical recorder of making of the master of claim 5, wherein the digital computer program of being carried out by described CPU is distributed to the name of operator's appointment each classification that is recorded in the numerical data on the optical recording media that is used for each input channel.
7. according to the pre-optical recorder of making of the master of claim 5, wherein the digital computer program of being carried out by the described CPU numerical data that further will be used for each input channel when preparing the pre-numerical data of making of this master is classified with record date.
8. the optical recorder of making in advance according to the master of claim 7 wherein further will be used for the numerical data of each record date to classify writing time by the digital computer program that described CPU carries out when preparing the numerical data of the pre-making of this master.
9. according to the pre-optical recorder of making of the master of claim 1, wherein said input signal regulating circuit comprises an automatic gain control (" AGC ") that makes simulating signal after the adjusting remain on a substantially constant intensity.
10. according to the pre-optical recorder of making of the master of claim 1, wherein said input signal regulating circuit comprises a voice activation switch (" VOX "), its intensity that responds the simulating signal of described input signal regulating circuit reception sends a signal to described CPU, and described CPU handles this signal and transmits with the numerical data of starting and stop from described CODEC to described RAM.
11. according to the pre-optical recorder of making of the master of claim 1, wherein said input signal regulating circuit provides at least two input channels that are used to receive simulating signal, and the pre-optical recorder of making of this master also comprises an input channel selector switch, and the simulating signal that is used to select to be received by an input channel is to monitor when described RAM transmits numerical data from described CODEC.
12. according to the pre-optical recorder of making of the master of claim 1, also comprise a network interface circuit that is connected with described RAM, be used for being connected of a pre-optical recorder of making of this master and a network, therefore allow the pre-optical recorder of making of this master to carry out electronic communication with the workstation that is connected to this network equally, the digital computer program of being carried out by described CPU also is applicable to by this network interface circuit numerical data is sent to the workstation that is connected with described network from described impact damper.
13. according to the pre-optical recorder of making of the master of claim 12, wherein the pre-optical recorder of making of this master only just sends to this workstation with numerical data when receiving the password of licensing numerical data from workstation.
14. according to the pre-optical recorder of making of the master of claim 12, wherein the pre-optical recorder of making of this master sends to the workstation that is connected to described network with the numerical data of encrypting.
15. according to the pre-optical recorder of making of the master of claim 1, wherein the digital computer program of being carried out by described CPU periodically is recorded in wherein numerical data from described impact damper with fetching semipermanent, handle the numerical data of numerical data to prepare from it to compress of being fetched, the numerical data of this compression will be recorded in the described impact damper to replace the numerical data of being fetched.
16. one kind is suitable for the logon workstations that uses in the network that comprises digital logger register, this logon workstations comprises:
The input signal regulating circuit is used for the simulating signal that is received by the input channel of this logon workstations is carried out electronic control, thereby produces the simulating signal after the adjusting that is suitable for being converted to numerical data;
CODEC is connected to described input signal regulating circuit, is used for receiving the simulating signal after regulating and being converted into numerical data from described input signal regulating circuit;
RAM is connected to described CODEC, is used to receive and temporarily store the numerical data that described CODEC produces;
Impact damper is used for receiving and semipermanent ground storage numerical data from described RAM;
Network interface circuit is connected to described RAM, and connects this logon workstations and network, therefore allows this logon workstations and other workstation and the digital logger register that are connected to this network equally to carry out electronic communication; With
CPU is connected to described CODEC, described RAM, described impact damper and described network interface circuit, and described CPU carries out a digital computer program, and the function of this program is:
Monitor the following operation of this logon workstations, be used for: the numerical data that described CODEC is responded the analogue signal generating that exists on the input channel of this logon workstations is sent to described RAM from described CODEC; Subsequently with this numerical data from described RAM be sent to described impact damper with this numerical data semipermanent be recorded in wherein;
Periodically from described impact damper fetch by semipermanent be recorded in wherein numerical data, handle the numerical data of numerical data to prepare from it to compress of being fetched, the numerical data of this compression will be recorded in the described impact damper to replace the numerical data of being fetched; With
Periodically numerical data is sent to network from described impact damper, to receive by the digital logger register that is connected to described network equally by network interface circuit.
17. according to the logon workstations of claim 16, wherein this logon workstations sends to the digital logger register that is connected to described network with the numerical data of encrypting.
18. according to the logon workstations of claim 16, wherein in order to receive from described RAM and semipermanent ground record numerical data, for described impact damper provides a high capacity RAM.
19. according to the logon workstations of claim 16, the read-write direct access storage device device that wherein is connected with described RAM is used for described impact damper and receives and semipermanent ground record numerical data from described RAM.
20. according to the logon workstations of claim 16, wherein said input signal regulating circuit comprises an automatic gain control (" AGC ") that makes simulating signal after the adjusting remain on a substantially constant intensity.
21. logon workstations according to claim 16, wherein said input signal regulating circuit comprises a voice activation switch VOX, its intensity that responds the simulating signal of described input signal regulating circuit reception sends signal to described CPU, and described CPU handles this signal and transmits with the numerical data of starting and stop from described CODEC to described RAM.
22. logon workstations according to claim 16, wherein said input signal regulating circuit provides at least two input channels that are used to receive simulating signal, and this logon workstations also comprises an input channel selector switch, and the simulating signal that is used to select to be received by an input channel is to monitor when described RAM transmits numerical data from described CODEC.
CN 00103437 2000-03-10 2000-03-10 Optical file recorder with provided enlonged recording time and pre-made by original copy Pending CN1313595A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740090B (en) * 2008-11-18 2013-12-04 康佳集团股份有限公司 Method for calling ex-situ computer storage files by multi-medium play system
CN106463164A (en) * 2014-07-29 2017-02-22 深圳市大疆创新科技有限公司 System and method for dynamically adjusting recording bitrate to accommodate writing speed of storage device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740090B (en) * 2008-11-18 2013-12-04 康佳集团股份有限公司 Method for calling ex-situ computer storage files by multi-medium play system
CN106463164A (en) * 2014-07-29 2017-02-22 深圳市大疆创新科技有限公司 System and method for dynamically adjusting recording bitrate to accommodate writing speed of storage device
US10602154B2 (en) 2014-07-29 2020-03-24 SZ DJI Technology Co., Ltd. System and method for dynamically adjusting a recording bitrate to accommodate a writing speed of a storage device
US11178402B2 (en) 2014-07-29 2021-11-16 SZ DJI Technology Co., Ltd. System and method for dynamically adjusting a recording bitrate to accommodate a writing speed of a storage device

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