CN1148991C - Equipment for detecting speech signal and making speaking transmission in communication system - Google Patents
Equipment for detecting speech signal and making speaking transmission in communication system Download PDFInfo
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- CN1148991C CN1148991C CNB011052805A CN01105280A CN1148991C CN 1148991 C CN1148991 C CN 1148991C CN B011052805 A CNB011052805 A CN B011052805A CN 01105280 A CN01105280 A CN 01105280A CN 1148991 C CN1148991 C CN 1148991C
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Abstract
The present invention relates to a device which can test the bit error rate of HDB3 code streams of which the code chip rate is 2 mbit/s, can position HDB3 code streams and can also perform a talk transmission function for TTL speech code streams with a preset code chip rate while performing a talk transmission function for HDB3 code streams. The device comprises a code converter, a data buffer, a main control circuit, a filter, a codec and a voice amplifier and is characterized in that the device also comprises a time slot configuration switch and a telephone channel control circuit.
Description
The present invention relates to communication system, particularly relate to the device that in communication system, voice signal is detected and converses and transmit.
In the prior art, generally come the digital voice signal in the testing GSM communication system and finish the conversation transmission of audio digital signals with the PCM analyzer.Fig. 1 shows in gsm communication system with the basic structure block diagram of PCM analyzer test from the audio digital signals of switch.The A interface of the switch in PCM analyzer and the gsm communication system links to each other, with the spreading rate that receives from the A interface is that 2Mbit/s, a sign indicating number type are the voice signal of HDB3, and this voice signal is carried out the test of the error rate and converts it to yard type is that the voice signal of TTL is decoded into it analog signal then to be transferred to subscriber unit.The PCM analyzer also can receive the analog voice signal from subscriber unit, it is encoded into the TTL voice signal becomes the HDB3 code stream of 2Mbit/s to send to the A interface of switch by code conversion afterwards.
As seen existing P CM analyzer be because its used sign indicating number type switch can only receive spreading rate is that 2Mbit/s and sign indicating number type are the code stream of HDB3 and can not directly receive the code stream of other yard type of other spreading rate, encodes and the voice signal of level type must be by extra conversion as receiving other.
In addition, existing P CM analyzer intelligence is carried out the analysis of the error rate to the voice signal on each channel of every link, and can not analyze and fault location.And its volume heaviness is unfavorable for on-the-spot operating maintenance.
The object of the present invention is to provide can be in communication system be that 2Mbit/s HDB3 code stream carries out error rate test and location and it is finished the conversation transfer function to spreading rate, can also finish the device of conversation transfer function to TTL speech code stream with other spreading rate.
Another purpose of the present invention is to provide a kind of can carry out failure cause test and location to spreading rate for the 2Mbit/sHDB3 code stream in communication system.
The invention provides a kind of can be in communication system be that the HDB3 code stream of 2Mbit/s carries out the test of the error rate and location and it is finished the conversation transfer function to spreading rate, can also finish the device of conversation transfer function to TTL speech code stream with predetermined spreading rate, comprise and be used for code conversion and the data buffer between HDB3 sign indicating number type and TTL sign indicating number type, changed, detect the governor circuit of the error rate of voice signal in described code conversion and the data buffer, to be decoded into filtering and the codec of delivering to described code conversion and data buffer after delivering to audio frequency amplifier or will be encoded into the TTL audio digital signals behind the analog voice signal from the TTL audio digital signals of described code conversion and data buffer with a predetermined code encoding/decoding mode from the analog voice signal of described audio frequency amplifier, the audio frequency amplifier that described filtering and the codec analog voice signal to subscriber unit or described subscriber unit to described filtering and codec is amplified, it is characterized in that, described device also comprises the time slot configuration switch, with the speech path control circuit, wherein: described time slot configuration switch is to be made of a plurality of switches; Described speech path control circuit, be used to receive/send stirring of described TTL digital speech code stream with predetermined spreading rate, the described time slot configuration switch of sensing, and represent that the coding transmission of the state of a plurality of switches described in the described time slot configuration switch gives described governor circuit; Described governor circuit, also be used for analyzing from the coding of described speech path control circuit, pass described information after by analysis back described speech path control circuit and described filtering and codec are configured with this analytic signal, described then speech path control circuit carries out link according to described analytical information to the described TTL voice signal with predetermined spreading rate that comes from the outside to be selected, and the audio digital signals of selecting out one or more link is sent to described filtering and codec or the TTL digital speech code stream that the audio digital signals link from a link of described filtering and codec was expanded into and was scheduled to spreading rate is sent; Described filtering and codec also carry out channel according to the described configuration of described governor circuit to the described audio digital signals from described speech path control circuit and select, voice signal on one or more channels of selecting is decoded into analog voice signal and sends to described audio frequency amplifier in the predetermined decoding mode, perhaps will in the predictive encoding mode it be encoded into the audio digital signals of a channel, the audio digital signals that channel is expanded into a link be sent to described speech path control circuit according to the described configuration of described governor circuit from the analog voice signal of audio frequency amplifier.
The invention provides a kind of can be in communication system be that the HDB3 code stream of 2Mbit/s carries out the test of the error rate and location and it is finished the conversation transfer function to spreading rate, can also finish the device of conversation transfer function to TTL speech code stream with predetermined spreading rate, comprise and be used for code conversion and the data buffer between HDB3 sign indicating number type and TTL sign indicating number type, changed, detect the governor circuit of the error rate of voice signal in described code conversion and the data buffer, to be decoded into filtering and the codec of delivering to described code conversion and data buffer after delivering to audio frequency amplifier or will be encoded into the TTL audio digital signals behind the analog voice signal from the TTL audio digital signals of described code conversion and data buffer with a predetermined code encoding/decoding mode from the analog voice signal of described audio frequency amplifier, the audio frequency amplifier that described filtering and the codec analog voice signal to subscriber unit or described subscriber unit to described filtering and codec is amplified, it is characterized in that, described device also comprises the time slot configuration switch, with the speech path control circuit, wherein: described time slot configuration switch is to be made of a plurality of switches; Described speech path control circuit, be used to receive/send stirring of described TTL digital speech code stream with predetermined spreading rate, the described time slot configuration switch of sensing, and represent that the coding transmission of the state of a plurality of switches described in the described time slot configuration switch gives described governor circuit; Described governor circuit, also be used for analyzing from the coding of described speech path control circuit, pass described information after by analysis back described speech path control circuit and described filtering and codec are configured with this analytic signal, described then speech path control circuit carries out link according to described analytical information to the described TTL voice signal with predetermined spreading rate that comes from the outside to be selected, and the audio digital signals of selecting out one or more link is sent to described filtering and codec or the TTL digital speech code stream that the audio digital signals link from a link of described filtering and codec was expanded into and was scheduled to spreading rate is sent; Described filtering and codec also carry out channel according to the described configuration of described governor circuit to the described audio digital signals from described speech path control circuit and select, voice signal on one or more channels of selecting is decoded into analog voice signal and sends to described audio frequency amplifier in the predetermined decoding mode, perhaps will in the predictive encoding mode it be encoded into the audio digital signals of a channel, the audio digital signals that channel is expanded into a link be sent to described speech path control circuit according to the described configuration of described governor circuit from the analog voice signal of audio frequency amplifier; Described code conversion and data buffer also comprise the failure cause of described HDB3 speech code stream and the error code degree detects and the interrupt vector register and the error code counter of error statistics, and described governor circuit also detects the failure cause of the voice signal in described code conversion and the data buffer and locatees.
In device of the present invention, also comprise auxiliary logical circuit, be used for flag bit chip selection signal, read-write and some address signals from described governor circuit are made up and delay time producing logic control signals such as sequential, sheet choosing, and control the sequential of described code conversion and data buffer, described filtering and codec and described speech path control circuit and realize that sheet selects function according to logic control signals such as these sequential, sheet choosings.
In device of the present invention, described a plurality of switches are represented link, channel and sense respectively, represent that wherein the switch number of link is corresponding with described predetermined spreading rate.
In device of the present invention, described governor circuit is also carried out following control: (a) serial ports of described governor circuit, middle fracture flag bit and other register are configured; (b) whether the described time slot configuration switch of the described speech path control circuit of inquiry is stirred; (c) the time slot configuration switch is struck as described, so to the coding of the state of a plurality of switches in the described time slot configuration switch of sampled representation from described speech path control circuit, and it is analyzed, be configured with all kinds of registers of this analytic signal then, with this analytic signal the link of described speech path control circuit selected simultaneously and expansion is controlled the time slot gain of described filtering and codec, described code encoding/decoding mode etc.; As be not struck, then get back to step (b).Described analytic signal comprise the indication calling still be outgoing, with the corresponding one or more links of described spreading rate in select to select in which link and 32 channels which channel at a link.
In device of the present invention, the link that described speech path control circuit is carried out is selected and be meant the audio digital signals of selecting by one or more link of described analytic signal indication from the digital speech code stream that has predetermined spreading rate from the external world described; And the link that described speech path control circuit is carried out expands and to be meant the audio digital signals from a link of described filtering and codec is placed on by on indicated that link of described analytic signal, and the voice signal on other link is made as the quiet frame signal, thereby constitute and the corresponding TTL speech code stream of described predetermined spreading rate.Described filtering and the channel that codec carried out are selected and are meant the configuration according to described governor circuit of described filtering and codec, select from one or more link from described speech path control circuit by the audio digital signals on one or more channels of described analytic signal indication; And described filtering and channel that codec carried out expand and are meant that described filtering and codec will be placed on from the voice signal of a channel of subscriber unit by on indicated that channel of described analytic signal according to described configuration, then the voice signal on other 31 channels is made as the quiet frame signal, thereby constitutes the voice signal of a link.
In device of the present invention, also can comprise one yard type translation interface, the digital speech code stream that is used for converting TTL sign indicating number type to from the digital speech code stream of other yard type in the external world is to described speech path control circuit, perhaps will convert the digital speech code stream of described other yard type from the digital speech code stream of the TTL sign indicating number type of described speech path control circuit to.
In device of the present invention, described governor circuit is also carried out following function: (f) described code conversion and data buffer are configured; (g) interrupt mechanism in described code conversion of activation and the data buffer; (h) when the interrupt signal that receives from described code conversion and data buffer, read described interrupt vector register and described error code counter in described code conversion and the data buffer, find out interruption source; (i) make described code conversion and data buffer interrupt returning.
In device of the present invention, it is characterized in that, described filtering and codec also can directly receive the TTL digital voice code stream that the spreading rate that comes from the outside is 2Mbit/s, and it is carried out filtering and be decoded into analog voice signal, send to described audio frequency amplifier then, perhaps receive from the analog voice signal of described audio frequency amplifier its filtering and the TTL audio digital signals that is encoded into 2Mbit/s are sent.
According to said structure, as seen because device of the present invention has time slot configuration switch and speech path control circuit, by to representing that above-mentioned governor circuit analyzes according to the coding of the state of a plurality of switches in the deploy switch, thereby can select the speech code stream (voice signal that comprises one or more links) of other spreading rate of coming from the outside, to select out by the voice signal on that channel of that represented link of above-mentioned switch, wherein at first from code stream, select the signal of that represented link of above-mentioned coding with predetermined spreading rate, from this link signal, select the signal of that represented channel of above-mentioned coding then, send to subscriber unit after handling and listen.Perhaps will be from the voice signal of a channel after the handling of subscriber unit, control according to governor circuit is expanded into it and the corresponding speech code stream of above-mentioned spreading rate (having one or more links), wherein the voice signal of above-mentioned channel is placed by on the indicated channel of switch, and other 31 channels are made as quiet frame, then the voice signal of this link is placed on by on the indicated link of switch, and other (if any) link is made as quiet frame, speech code stream after will expanding again sends out, and has so just finished the function that the TTL speech code stream of other spreading rate is communicated transmission.
In addition, because used code conversion and data buffer have the failure cause of HDB3 voice signal and the error code degree detects and the interrupt vector register and the error code counter of error statistics in device of the present invention, so, can finish the function that the error rate and failure cause to the HDB3 code stream detect and locate by the control of governor circuit.
Apparatus structure of the present invention is simple, volume is little, and in light weight.
Below, with reference to accompanying drawing, by the detailed description to preferred embodiment of the present invention, above-mentioned and further feature of the present invention and advantage will be apparent.
Fig. 1 is the block diagram that the concrete application of PCM analyzer in gsm system in the prior art is shown;
Fig. 2 is the block diagram according to the first embodiment of the present invention;
Fig. 3 is the flow chart of analyzing according to stirring of switch and controlling according to this analytic signal according to the governor circuit of the first embodiment of the present invention;
Fig. 4 is governor circuit detection code conversion and the error rate of data buffer and the flow chart of failure cause according to a second embodiment of the present invention; With
Fig. 5 is the block diagram according to a kind of work-around solution of device of the present invention.
Below, with reference to accompanying drawing, describe preferred embodiment of the present invention in detail.
Now, with reference to Fig. 2, it shows the block diagram according to a preferred embodiment of the present invention.Wherein, detection of the present invention and conversation transmitting device comprise that time slot configuration switch 21, speech path control circuit 22, governor circuit 23, sign indicating number type change and data buffer 24, filtering and codec 25 and audio frequency amplifier 26.
Now, with input speech signal be the TTL speech code stream of 8Mbit/s be example explanation the present invention to specific implementation process, and the function of each module.It should be noted that the present invention also can be used for the TTL speech code stream of other spreading rate, this all drops in the scope of the present invention that is limited by appended claims.
Because the TTL voice signal of 8Mbit/s is made of 4 links, and every link comprises 32 channels.Therefore, in the time slot configuration switch 21 of this embodiment, comprise 8 switch A-F.They are respectively applied for control and come outgoing (switch H, the expression outgoing is opened in closed expression calling), link selection (switch F and G, expression link 0-3) and channel to select (switch A-E, expression channel 0-31).When toggle switch A-H, because speech path control circuit 22 directly links to each other with each switch in the time slot configuration switch, so just sense stirring of switch, and will represent that the coding (in the present embodiment, for example 01000101) of the state of switch A-H sends to governor circuit 23.Governor circuit 23 is promptly analyzed this coding, and described analysis comprises that analyzing switch H is 1, promptly represents calling; Switch FG is 10, promptly represents the 2nd link in 4 links; Switch A-E is 01000, promptly represents the 8th channel in 32 channels.So generation analytic signal, this analytic signal comprise the information of calling, the 2nd link and the 8th channel.
Governor circuit 23 is selected out the 2nd audio digital signals (that is, spreading rate is the TTL voice signal of 2Mbit/s) in the link according to this analytic signal control speech path control circuit in the TTL speech code stream of (that is, the living) 8Mbit/s that imports from the external world.Then, the audio digital signals on 32 channels selecting out in the 2nd link is sent to filtering and codec 25 continuously.
Governor circuit is carrying out according to analytic signal control speech path control circuit when link selects, and also according to this analytic signal configuration filtering and codec 25, mainly disposes all kinds of registers such as time slot gain, code encoding/decoding mode of filtering and codec 25.When filtering and codec 25 received 32 channel signals that sent continuously by speech path control circuit 22, it was selected by the 8th indicated channel of above-mentioned analytic signal according to this configuration.So, the audio digital signals on the 8th channel is carried out filtering with smooth waveform, with the PCM decoding process it is decoded then, form analog signal, and send to audio frequency amplifier 26.26 pairs of these analog signals of audio frequency amplifier are carried out audio frequency and are amplified, and last people just can hear the voice signal of this link by subscriber unit.
Certainly, only list device of the present invention in the above-described embodiments and how from the TTL voice signal of 8Mbit/s, to have selected 1 link (promptly, the voice signal of 2Mbit/s) voice signal, promptly from this link, select the process of the signal of a channel to subscriber unit, so the signal to several channels of selecting several links from the TTL voice signal of 8Mbit/s determines according to field requirement to subscriber unit, promptly, can select a channel or a plurality of channel on the link to give subscriber unit, the one or more channels in the also optional majority link are given subscriber unit.
More than explanation is the process that voice signal on the channel of how selecting out in the voice signal from calling in the link is transferred to subscriber unit.
Below, how to describe in detail and will encode and be expanded into the process of the TTL speech code stream transmission of 8Mbit/s from the analog signal of subscriber unit.
Refer again to Fig. 2, when the time slot deploy switch was struck, speech path control circuit 22 promptly sensed, so it will represent that the coding of the state of time slot switch A-H is sent to governor circuit 23 as (01000100).Governor circuit 23 is analyzed it with said method, and this analysis comprises that analyzing switch H is 0, promptly represents outgoing; Switch FG is 10, promptly represents the 2nd link in 4 links; Switch A-E is 01000, promptly represents the 8th channel in 32 channels.So generation analytic signal, this analytic signal comprise the information of outgoing, the 2nd link and the 8th channel.
Governor circuit 23 is configured filtering and codec according to this analytic signal.So,, after audio frequency amplifies, be transferred to filtering and codec 25 when audio frequency amplifier 26 receives analog voice signal from subscriber unit.25 pairs of these analog voice signals of filtering and codec carry out filtering with filtering interfering, in the pcm encoder mode it are encoded into the TTL audio digital signals of a channel then.Afterwards, filtering and codec 25 are according to above-mentioned configuration, the TTL audio digital signals of a channel is expanded into a link (promptly, spreading rate is 2Mbit/s) voice signal, wherein it will be placed on from the voice signal of that channel of subscriber unit by on indicated the 8th channel of above-mentioned analytic signal, and other 31 channels are made as quiet frame signal (that is 54 coded signals).Then, this link signal that will comprise from the voice signal of subscriber unit sends to speech path control circuit 22.
So governor circuit 23 will be expanded into the TTL digital speech code stream of the signal (that is, spreading rate is 8Mbit/s) of 4 links from the signal of a link of filtering and codec according to analytic signal control speech path control circuit 22.Wherein speech path control circuit 22 is placed on the signal of this link on the 2nd link, and other 3 links (link 0,1 and 3) are made as the quiet frame signal.So, the speech path control circuit 22 TTL audio digital signals that will comprise from the 8Mbit/s of the voice signal of subscriber unit sends.
By said method, just having finished spreading rate is the conversation transmission of the TTL voice signal of 8Mbit/s.
Referring now to Fig. 3 the control flow of governor circuit 23 in said process described.At first, governor circuit 23 is configured (step S41) to its serial ports, middle fracture flag bit and other register.Then, governor circuit 23 inquires promptly whether speech path control circuit 22 time slot configuration switches stir (step S42).If it's not true, then continue inquiry.If stir, the coding of the state of a plurality of switches in the sampled representation time slot configuration switch 21 from speech path control circuit 22 then, such as in first embodiment 01000101, in step S43.Afterwards, in governor circuit 23, this coding is analyzed, produced analytic signal, such as the analytic signal of indicating calling, the 2nd link and the 8th channel in the foregoing description, in step S44.Governor circuit 23 carries out link according to this analytic signal control speech path control circuit to be selected or expands, such as selecting out the 2nd link, in step S45.Simultaneously, according to all kinds of registers such as the time slot gain of configuration filtering of this analytic signal and codec, code encoding/decoding modes, because the PCM code encoding/decoding mode of usefulness has two kinds of pattern: A rules and μ rule in the present embodiment, therefore this governor circuit disposes the time slot gain and the code encoding/decoding mode of filtering and codec according to analytic signal, promptly, select the A rule or the μ rule of PCM code encoding/decoding mode, such as, filtering and codec are selected the 8th channel according to this configuration from calling voice signal carries out filtering and encoding and decoding.For calling and outgoing process, main road control is all controlled according to this flow process.
Though in the first embodiment of the present invention, only enumerated the conversation transmission method of 8Mbit TTL digital speech information, should be understood that the present invention also can be used for the conversation transmission to the TTL digital speech information of other spreading rate.And number of switches of the present invention also is not to be defined as 8, but decides according to the spreading rate of speech code stream to be processed, is the code stream of 16Mbit/s if handle spreading rate, just needs 9 switches.Therefore because the code stream of 16Mbit/s has 8 links, in 9 switches, switch is used for expression and comes outgoing, and 3 switches are used for representing link, and 5 switches are used for representing channel.This shows that switch number of the present invention is relevant with spreading rate.In addition, in the present embodiment, indicate outgoing, represent 4 links, represent 32 channels with switch A-E with switch F and H with switch H.Certainly, also can be with their order independent assortment and arrangement.
Why the present invention is that it can only carry out encoding and decoding between TTL audio digital signals and analog signal because be subjected to the restriction of filtering and codec at the TTL digital speech information.In the present invention, filtering and codec are by the TP3071N at least of National Semiconductor.Certainly,, can before the speech path control circuit 22 in this device, add a code pattern converter in addition, convert the TTL speech code stream to speech code stream and get final product other yard type if carry out the transmission of other yard type with device of the present invention.As transmitting the difference speech code stream of 8Mbit/s, promptly before speech path control circuit 22, add the translation interface of a RS_485, convert this difference speech code stream to the TTL speech code stream.
More than be that device of the present invention is finished the process that the digital speech code stream with predetermined spreading rate is conversed and transmitted.As for the HDB3 that for spreading rate is 2Mbit/s the converse transmission and the detection of the error rate, because code pattern converter and the data buffer used in first embodiment are used in the PCM analyzer in the prior art, therefore belong to the prior art category, just main repetition more here.
Below, finish the error rate of HDB3 code stream that spreading rate is 2Mbit/s and failure cause with reference to Fig. 4 introduction device according to a second embodiment of the present invention and detect and locate and the process of the transfer function of conversing.The frame structure of the device of the second embodiment of the present invention is basically the same as those in the first embodiment, different is, used code conversion and data buffer are to have that failure cause to the HDB3 code stream detects and the register of error statistics in the device of the second embodiment of the present invention, it can store interrupt vector, code conversion of the present invention and data buffer also have error code counter, and it has reflected the degree of the error rate.
The process of conversation transmission how to finish the HDB3 code stream of 2Mbit/s as for device according to a second embodiment of the present invention is to belong to the prior art category, so just it is briefly described in the present invention.
At first, the 2Mbit/s HDB3 code stream that receives from A interface in the switch of gsm system by the code conversion among Fig. 2 and data buffer 24, it is converted to the TTL code stream of 2Mbit/s behind data buffering, channel ground sends to filtering and codec 25 continuously one by one then.Filtering and codec are decoded to it in a predictive encoding mode and are transferred to audio frequency amplifier 26 and amplify to carry out audio frequency, and last people can hear this information by subscriber unit.It more than is the transmission course of calling.The transmission course of outgoing, vice versa.
Below, the device of describing the second embodiment of the present invention with reference to Fig. 4 carries out the testing process of the error rate and failure cause to the HDB3 code stream of 2Mbit/s.Can only carry out the detection of the error rate to the HDB3 code stream of 2Mbit/s in the prior art, but can't detect for the failure cause that produces.And device of the present invention not only can detect the error rate and can also detect failure cause.
Carry out the detection and the location of the error rate and failure cause by the governor circuit in the device of the present invention 23, detailed process is as follows:
In step S51, governor circuit is configured (that is, carrying out initialization) to code conversion and data buffer.In step S52, governor circuit enables the interrupt mechanism of code conversion and data buffer, thereby one breaks down or the error rate one reaches some, and code conversion and data buffer just interrupt.So governor circuit is promptly waited for interruption, among the step S53.When code conversion and data buffering interruption, governor circuit reads the register of the storage interrupt vector in code conversion and the data buffer and the error code counter that reflects the degree of the error rate, analyze then and find out interruption source, and detect the error rate (step S54).At last, code conversion and data buffer interrupt returning (step S55).
By said method, device of the present invention can carry out the detection and the location of the error rate and interruption source to the HDB3 code stream of 2Mbit/s.
In the present embodiment, used code conversion and data buffer 24 are code conversion and the data buffer MT9075B that made by Canadian Min Di company.
Fig. 5 illustrates the structure of a kind of work-around solution of device of the present invention.In this structure, device of the present invention also comprises an auxiliary logical circuit 27.Its function is: flag bit chip selection signal, read-write and some address signals from governor circuit are made up and delay time producing logic control signals such as sequential, sheet choosing, and control the sequential of described code conversion and data buffer, described filtering and codec and described speech path control circuit and realize that sheet selects function according to logic control signals such as these sequential, sheet choosings.Above-mentioned auxiliary logical circuit can design in Programmable Logic Device (CPLD) and finish.
In device of the present invention, described PCM code encoding/decoding mode comprises A rule and μ rule pattern, and A rule or μ rule pattern are set when governor circuit 23 disposes described filtering and codec according to described analytic signal.
And above-mentioned filtering and codec also can directly receive the TTL digital voice code stream that the spreading rate that comes from the outside is 2Mbit/s, according to the configuration of governor circuit it being carried out channel selects, be decoded into analog voice signal through after the filtering, send to described audio frequency amplifier then, perhaps receive analog voice signal from described audio frequency amplifier with its filtering and be encoded into the TTL audio digital signals, the configuration according to governor circuit directly sends the TTL voice signal that it is expanded into 2Mbit/s then.Described governor circuit mainly is made of digital signal processor and peripheral circuit thereof.Logical circuit part in the described speech path control circuit can design in Programmable Logic Device (CPLD) to be finished.
It more than is detailed description to preferred embodiment of the present invention.Should be understood that they only are used to feature of the present invention and advantage are described, rather than limit the invention.According to religious doctrine of the present invention, the various variations that they are carried out all fall within the scope of the invention, and predetermined as described code encoding/decoding mode comprises PCM code encoding/decoding mode, self adaptation feedback code encoding/decoding mode, Δ code encoding/decoding mode, or the like.
Claims (20)
- One kind can be in communication system be that the HDB3 code stream of 2Mbit/s carries out the test of the error rate and location and it is finished the conversation transfer function to spreading rate, can also finish the device of conversation transfer function to TTL speech code stream with predetermined spreading rate, comprise and be used for code conversion and the data buffer between HDB3 sign indicating number type and TTL sign indicating number type, changed, detect the governor circuit of the error rate of voice signal in described code conversion and the data buffer, to be decoded into filtering and the codec of delivering to described code conversion and data buffer after delivering to audio frequency amplifier or will be encoded into the TTL audio digital signals behind the analog voice signal from the TTL audio digital signals of described code conversion and data buffer with a predetermined code encoding/decoding mode from the analog voice signal of described audio frequency amplifier, the audio frequency amplifier that described filtering and the codec analog voice signal to subscriber unit or described subscriber unit to described filtering and codec is amplified, it is characterized in that, described device also comprises the time slot configuration switch, with the speech path control circuit, wherein:Described time slot configuration switch is to be made of a plurality of switches;Described speech path control circuit, be used to receive/send stirring of described TTL digital speech code stream with predetermined spreading rate, the described time slot configuration switch of sensing, and will represent that the coding transmission of the state of a plurality of switches described in the described time slot configuration switch gives described governor circuit;Described governor circuit, also be used for analyzing from the coding of described speech path control circuit, pass described information after by analysis back described speech path control circuit and described filtering and codec are configured with this analytic signal, described then speech path control circuit carries out link according to described analytical information to the described TTL voice signal with predetermined spreading rate that comes from the outside to be selected, and the audio digital signals of selecting out one or more link is sent to described filtering and codec or will be expanded into and be scheduled to the corresponding TTL digital speech of spreading rate code stream from the audio digital signals link of a link of described filtering and codec send;Described filtering and codec also carry out channel according to the described configuration of described governor circuit to the described audio digital signals from described speech path control circuit and select, voice signal on one or more channels of selecting is decoded into analog voice signal and sends to described audio frequency amplifier in the predetermined decoding mode, perhaps will in the predictive encoding mode it be encoded into the audio digital signals of a channel, the audio digital signals that channel is expanded into a link be sent to described speech path control circuit according to the described configuration of described governor circuit from the analog voice signal of audio frequency amplifier.
- 2. device as claimed in claim 1, it is characterized in that, described code conversion and data buffer also comprise the failure cause of described HDB3 speech code stream and the error code degree detects and the interrupt vector register and the error code counter of error statistics, and described governor circuit also detects the failure cause of the voice signal in described code conversion and the data buffer and locatees.
- 3. device as claimed in claim 1 or 2, it is characterized in that, also comprise auxiliary logical circuit, be used for flag bit chip selection signal, read-write and some address signals from described governor circuit are made up and delay time producing logic control signals such as sequential, sheet choosing, and control the sequential of described code conversion and data buffer, described filtering and codec and described speech path control circuit and realize that sheet selects function according to logic control signals such as these sequential, sheet choosings.
- 4. device as claimed in claim 1 or 2 is characterized in that, described a plurality of switches are represented link, channel and sense respectively, represents that wherein the switch number of link is corresponding with described predetermined spreading rate.
- 5. device as claimed in claim 1 or 2 is characterized in that, described governor circuit also is configured to carry out following control:(a) serial ports of described governor circuit, middle fracture flag bit and other register are configured;(b) whether the described time slot configuration switch of the described speech path control circuit of inquiry is stirred;(c) the time slot configuration switch is struck as described, so to the coding of the state of a plurality of switches described in the described time slot configuration switch of sampled representation from described speech path control circuit, and it is analyzed, be configured with all kinds of registers of this analytic signal then, with this analytic signal the link of described speech path control circuit selected simultaneously and expansion is controlled the time slot gain of described filtering and codec, described code encoding/decoding mode etc.; As be not struck, then get back to step (b).
- 6. device as claimed in claim 5, it is characterized in that, described analytic signal comprise the indication calling still be outgoing, with the corresponding one or more links of described predetermined spreading rate in select to select in which link and 32 channels which channel at a link.
- 7. device as claimed in claim 6, it is characterized in that, described speech path control circuit is configured to carry out link and selects, and promptly selects the audio digital signals by one or more link of described analytic signal indication from the digital speech code stream that has predetermined spreading rate from the external world described; Perhaps described speech path control circuit is configured to carry out link and expands, being about to audio digital signals from a link of described filtering and codec is placed on by on indicated that link of described analytic signal, and the voice signal on other link is made as the quiet frame signal, thereby constitute and the corresponding TTL speech code stream of described predetermined spreading rate.
- 8. device as claimed in claim 6, it is characterized in that, described governor circuit carries out the configuration of register to filtering and encoder according to described analytic signal, described filtering and codec are configured to carry out channel and select, promptly, from one or more link, select by the audio digital signals on one or more channels of described analytic signal indication from described speech path control circuit according to the configuration of described governor circuit; Perhaps described filtering and codec are configured to carry out channel and expand, promptly will be placed on from the voice signal of a channel of subscriber unit by on indicated that channel of described analytic signal according to described configuration, then the voice signal on other 31 channels is made as the quiet frame signal, thereby constitutes the voice signal of a link.
- 9. device as claimed in claim 1 or 2 is characterized in that, described audio digital signals with predetermined spreading rate is that spreading rate is the TTL digital speech code stream of 8Mbit/s.
- 10. device as claimed in claim 1 or 2, it is characterized in that, also can comprise one yard type translation interface, the digital speech code stream that is used for converting TTL sign indicating number type to from the digital speech code stream of other yard type in the external world is to described speech path control circuit, perhaps will convert the digital speech code stream of described other yard type from the digital speech code stream of the TTL sign indicating number type of described speech path control circuit to.
- 11. device as claimed in claim 10 is characterized in that, described translation interface is RS485, and it carries out a yard type conversion between difference speech code stream and TTL code stream.
- 12. device as claimed in claim 2, described governor circuit is configured to:(d) described code conversion and data buffer are configured;(e) interrupt mechanism in described code conversion of activation and the data buffer;(f) when the interrupt signal that receives from described code conversion and data buffer, read described interrupt vector register and described error code counter in described code conversion and the data buffer, find out interruption source;(g) make described code conversion and data buffer interrupt returning.
- 13. device as claimed in claim 1 or 2, it is characterized in that, described filtering and codec are configured to carry out encoding and decoding according to described predetermined code encoding/decoding mode, and described predetermined code encoding/decoding mode comprises PCM code encoding/decoding mode, self adaptation feedback code encoding/decoding mode, Δ code encoding/decoding mode, or the like.
- 14. device as claimed in claim 13, it is characterized in that, described filtering and codec are configured to carry out encoding and decoding according to described PCM code encoding/decoding mode, described PCM code encoding/decoding mode comprises A rule and μ rule pattern, and described governor circuit when being formed at and disposing described filtering and codec according to described analytic signal the A rule is set or μ restrains pattern.
- 15. device as claimed in claim 1 or 2, it is characterized in that, it is the TTL digital voice code stream of 2Mbit/s that described filtering and codec are configured to directly receive the spreading rate that comes from the outside, and it is carried out filtering and be decoded into analog voice signal, send to described audio frequency amplifier then, perhaps receive from the analog voice signal of described audio frequency amplifier its filtering and the TTL audio digital signals that is encoded into 2Mbit/s are sent
- 16. device as claimed in claim 1 or 2 is characterized in that, described governor circuit mainly is made of digital signal processor and peripheral circuit thereof.
- 17. device as claimed in claim 1 or 2 is characterized in that, the logical circuit part in the described speech path control circuit can design in Programmable Logic Device (CPLD) to be finished.
- 18. device as claimed in claim 1 or 2 is characterized in that, the model of described filtering and codec is TP3071N.
- 19. device as claimed in claim 2 is characterized in that, the model of described code conversion and data buffer is MT9075B.
- 20. device as claimed in claim 3 is characterized in that, described auxiliary logical circuit can design in Programmable Logic Device (CPLD) and finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052805A CN1148991C (en) | 2001-01-22 | 2001-01-22 | Equipment for detecting speech signal and making speaking transmission in communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011052805A CN1148991C (en) | 2001-01-22 | 2001-01-22 | Equipment for detecting speech signal and making speaking transmission in communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1367635A CN1367635A (en) | 2002-09-04 |
| CN1148991C true CN1148991C (en) | 2004-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011052805A Expired - Lifetime CN1148991C (en) | 2001-01-22 | 2001-01-22 | Equipment for detecting speech signal and making speaking transmission in communication system |
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| Country | Link |
|---|---|
| CN (1) | CN1148991C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390600B (en) * | 2017-09-04 | 2019-05-14 | 中国电子科技集团公司第二十四研究所 | Data acquisition device and collecting method with a variety of link modes |
-
2001
- 2001-01-22 CN CNB011052805A patent/CN1148991C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1367635A (en) | 2002-09-04 |
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