CN1236631C - Vocoder unit for mobile communication system and its phonetic frame displayching method - Google Patents
Vocoder unit for mobile communication system and its phonetic frame displayching method Download PDFInfo
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- CN1236631C CN1236631C CN 03134818 CN03134818A CN1236631C CN 1236631 C CN1236631 C CN 1236631C CN 03134818 CN03134818 CN 03134818 CN 03134818 A CN03134818 A CN 03134818A CN 1236631 C CN1236631 C CN 1236631C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/181—Transcoding devices; Rate adaptation devices
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Abstract
The present invention relates to a vocoder device in a mobile communication system and a phonetic frame dispatching method of the vocoder device. The device comprises a main control CPU, n digital signal processors DSP, a time division multiplexing TDM interface and an interruption generating logical unit, wherein the main control CPU is used for receiving encoded phonetic frames, writing the received phonetic frames into vocoder units of corresponding digital signal processors DSP for decoding and simultaneously reading the encoded phonetic frames of the vocoder units of the corresponding digital signal processors DSP; each of the n digital signal processors DSP, can realize m vocoder units and simultaneously complete the function of coding and decoding m paths of phonemes; the time division multiplexing TDM interface is arranged in DSP for receiving and transmitting phonetic PCM code streams; the interruption generating logical unit is used for generating timer interruption signals which are transmitted to the main control CPU and the digital signal processors DSP. The method mainly processes the phonetic frames of all vocoder units in one interruption to make the main control CPU not frequently respond to interrupt processing any longer, and the performance of the main control CPU is increased.
Description
Technical field
The present invention relates to the vocoder device, relate in particular to vocoder device and speech frame dispatching method thereof in the field of mobile communication.
Background technology
In mobile communcations system, in order effectively to utilize the frequency spectrum resource of air interface, the voice that transmit between mobile station MS (Mobile Station) and base station all are the speech frames through the speech coding compression.Vocoder is exactly the device of changing between the PCM sign indicating number of realizing through the speech frame of speech coding compression and standard.General speech coding algorithm all has big, the real-time characteristics of operand.Digital signal processor (DSP, Digital Signal Processor) has very fast arithmetic speed, and realizes being highly suitable in the vocoder system and using flexibly.In vocoder system, need a master cpu (Central Processing Unit) that DSP is managed simultaneously, and master cpu to take out the speech frame that coding is finished from DSP or handle needs the decoded speech frame to deposit DSP in.At publication number is CN1409575A (the open date: in the Chinese patent literature on April 9th, 2003), provide a kind of vocoder system and business frame exchanging method thereof that adopts multiple port routing to communicate.Its system forms and comprises: a master cpu, be used for receiving the traffic frame that the base station sends, and write the multiple port routing to communicate unit, and the traffic frame of multiple port routing to communicate unit is sent to the base station; The multiple port routing to communicate unit is used for the storage service frame, and its inside is divided into n master cpu transmission/DSP again and receives formation and n master cpu reception/DSP transmit queue; N digital signal processor is according to the interrupt signal reception and the transmission traffic frame of multiple port routing to communicate unit; The E1 interface that links to each other with mobile switching centre; Clock receiving element 1; And the clock receiving element 2 that extracts the E1 interface clock.The business frame exchanging method of its system is: master cpu receives traffic frame by the interface with the base station, traffic frame is write the multiple port routing to communicate unit, generating unit is interrupted in visit, interrupt the digital signal corresponding processor, digital signal processor reads traffic frame, give this digital signal processor and handle in the vocoder unit that realizes by time division multiplexing pairing one, the traffic frame of this vocoder unit writes the multiple port routing to communicate unit by digital signal processor, generating unit is interrupted in visit, interrupt master cpu, master cpu receives traffic frame, sends to the base station.
In this existing patent documentation, system adopts the buffer unit of multiple port routing to communicate unit as speech frame between master cpu and the digital signal processor, cause the system configuration complexity, speech frame need be transmitted through the storage of multiple port routing to communicate unit, has increased the time delay of speech frame; The mode access speech frame that simultaneity factor adopt to be interrupted, each speech frame all can trigger once and interrupt, the vocoder unit in system more for a long time, master cpu can be interrupted continually, causes the decreased performance of master cpu.When the vocoder unit of master cpu control more for a long time, if master cpu adopts the method for the speech frame of a vocoder unit of each Interrupt Process, master cpu has considerable time waste on the environment of preserving Interrupt Process, reduces the efficient of master cpu.For example in code division multiple access system, the duration of a speech frame is 20 milliseconds, if a master cpu is controlled 480 tunnel vocoder unit, then per 42 microseconds will produce once interrupts, and frequent interruption can reduce the operational efficiency of master cpu greatly.
Summary of the invention
Technical problem to be solved by this invention is: in order to have overcome hardware configuration complexity of the prior art, vocoder unit shortcoming such as add to the difficulties in the system, the object of the present invention is to provide the vocoder device in a kind of mobile communication system, hardware configuration is simple, system's vocoder unit integrated level height.
Another object of the present invention is to provide a kind of speech frame dispatching method of the buffering area of forming based on the DSP internal RAM, in an interruption, the speech frame of all vocoder unit is handled, make master cpu no longer frequently respond Interrupt Process, improved the performance of master cpu.
Vocoder device of the present invention comprises following part:
Master cpu is used for the speech frame behind the received code, and the vocoder unit that the speech frame that receives writes among the corresponding D SP is decoded, and reads the speech frame behind the vocoder unit coding among the corresponding DSP simultaneously; N DSP has m vocoder unit among each DSP, can finish the codec functions of m road speech frame simultaneously; In DSP, also comprise a time division multiplexing (TDM, Time Division Multiplexing) interface, be used for receiving and sending the pcm stream of voice; Interruption generating logical unit is used for producing regularly interrupt signal and gives master cpu and DSP.By the RAM Shared of forming of DSP internal RAM, promptly this part RAM not only DSP can visit, master cpu is by also visiting with the interface of DSP.RAM Shared is divided into the transmission buffering area again, is used for depositing speech frame to be decoded; Receive buffering area, be used for depositing the speech frame that DSP finishes coding; The pointer buffering area is used for depositing the operation pointer that sends buffering area and receive buffering area.
The speech frame dispatching method of vocoder device of the present invention:
Interruption generating logical unit regularly produces interrupts giving master cpu and DSP, and regularly the interval of interrupting equals the duration of a speech frame.
Have no progeny in the master cpu response, all vocoder unit carried out following handling process:
201. read read operation pointer and the write operation pointer that sends buffering area from the pointer buffering area, calculate the idle queues that sends in the buffering area thus.
202. speech frame to be decoded is write in the respective queue that sends buffering area.
203. after the write operation pointer that sends buffering area reset, write back the pointer buffering area.
204. read read operation pointer and the write operation pointer that receives buffering area from the pointer buffering area, calculate the position that receives the speech frame in the buffering area thus.
205. the speech frame of coding is read from the respective queue that receives buffering area.
206. after the read operation pointer that receives buffering area reset, write back the pointer buffering area.
Have no progeny in the DSP response, all vocoder unit carried out following handling process:
207. read read operation pointer and the write operation pointer that sends buffering area from the pointer buffering area, calculate the position that sends the speech frame in the buffering area thus.
208. speech frame to be decoded is read from the respective queue that sends buffering area, is sent corresponding vocoder unit decoding output.
209. after the read operation pointer that sends buffering area reset, write back the pointer buffering area.
210. read read operation pointer and the write operation pointer that receives buffering area from the pointer buffering area, calculate the idle queues that receives in the buffering area thus.
211. vocoder unit being finished the speech frame of coding writes in the idle queues that receives buffering area.
212. after the write operation pointer that receives buffering area reset, write back the pointer buffering area.
Adopt the method for the invention and device, compared with prior art, removed the multiple port routing to communicate unit of buffer memory speech frame, hardware configuration is simple, is interrupting in the generation, and what regularly interrupt is the duration of a speech frame at interval, in an interruption, the speech frame of all vocoder unit is handled, rather than the speech frame of each vocoder unit all produces once and to interrupt, and makes master cpu no longer frequently respond Interrupt Process, improved the performance of master cpu.
Description of drawings
Fig. 1 is a kind of vocoder device schematic diagram that the present invention proposes;
Fig. 2 is a kind of speech frame dispatching method schematic diagram that the present invention proposes;
Fig. 3 is first kind of concrete transmission buffering area structure chart of implementing of the RAM Shared among Fig. 1;
Fig. 4 is first kind of concrete reception buffering area structure chart of implementing of the RAM Shared among Fig. 1;
Fig. 5 is first kind of concrete pointer buffering area structure chart of implementing of the RAM Shared among Fig. 1;
Fig. 6 is second kind of concrete transmission buffering area structure chart of implementing of the RAM Shared among Fig. 1;
Fig. 7 is second kind of concrete reception buffering area structure chart of implementing of the RAM Shared among Fig. 1;
Fig. 8 is second kind of concrete pointer buffering area structure chart of implementing of the RAM Shared among Fig. 1.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme:
As shown in Figure 1, hardware components of the present invention is made up of master cpu 101, DSP102 and interruption generating logical unit 103.DSP102 comprises the internal RAM that a TDM interface and master cpu 101 can be visited.
The RAM Shared of DSP102 inside is divided into three parts, is respectively to send buffering area formation 301, reception buffering area formation 302 and pointer buffering area formation 303.Fig. 3 is the transmission buffering area structure chart of the RAM Shared among Fig. 1; Fig. 4 is the reception buffering area structure chart of the RAM Shared among Fig. 1; Fig. 5 is the pointer buffering area structure chart of the RAM Shared among Fig. 1; What transmission buffering area formation 301 was deposited is that master cpu 101 writes DSP102, and the wait vocoder unit is carried out the decoded speech frame; What receive that buffering area formation 302 deposits is that the vocoder unit of DSP is finished coding, waits for the speech frame that master cpu 101 takes out; Pointer buffering area formation 303 is deposited master cpu and DSP102 to sending buffering area formation 301 and receiving the pointer that buffering area formation 302 is operated, comprise: 101 pairs of write operation pointers (TxWrite Ptr) that send buffering area formation 301 of master cpu, 101 pairs of read operation pointers (Rx Read Ptr) that receive buffering area formation 302 of master cpu, DSP102 is to sending the read operation pointer (Tx Read Ptr) of buffering area formation 301, and DSP102 is to receiving the write operation pointer (Rx Write Ptr) of buffering area formation 302.In Fig. 3,4,5, CHANNEL is meant the formation of vocoder unit corresponding cache speech frame, the corresponding vocoder unit of each CHANNEL.Each DSP102 can realize that M vocoder unit carry out encoding and decoding speech simultaneously.Each CHANNEL can be K speech frame of vocoder unit buffer memory.
After master cpu 101 is received speech frame, be temporarily stored in the buffering area of master cpu 101, wait for that interrupt logic generation unit 103 produces regularly interruption, regularly the interval of interrupting equals the duration of a speech frame, after interrupting producing, trigger in the transmission buffering area formation 301 of corresponding vocoder unit correspondence that master cpu 101 writes temporary speech frame DSP102, in speech frame, comprise control information, indicate the sequence number of purpose DSP102 of this speech frame and the unit number of affiliated vocoder unit, it is as follows that master cpu 101 writes the process that sends buffering area formation 301 with speech frame: master cpu 101 is access pointer buffering area formation 303 at first, read the write operation pointer (Tx Write Ptr) of the master cpu 101 of corresponding CHANNEL and the read operation pointer (Tx ReadPtr) of DSP102, master cpu 101 compares these two pointers, check whether the corresponding CHANNEL that sends buffering area formation 301 has the free time, if do not have the free time then alarm and withdraw from, if send the corresponding CHANNEL of buffering area formation there is the free time, then write speech frame, then the write operation pointer (Tx Write Ptr) of 101 pairs of transmissions of master cpu buffering area formation 301 is added 1 and write back pointer buffering area 303 again.Master cpu 101 reads speech frame from receive buffering area formation 302 process is as follows: master cpu 101 is access pointer buffering area formation 303 at first, read the read operation pointer (Rx Read Ptr) of the master cpu 101 of corresponding CHANNEL and the write operation pointer (Rx Write Ptr) of DSP102, master cpu 101 compares these two pointers, check whether the corresponding CHANNEL that receives buffering area formation 302 has speech frame, if speech frame is arranged, then from the corresponding CHANNEL that receives buffering area formation 302, read speech frame, then the read operation pointer of master cpu 101 (RxRead Ptr) is added 1 and write back pointer buffering area 303.
Interruption generating logical unit 103 triggers in the DSP102 generation and has no progeny, DSP102 at first poll sends buffering area formation 301, give the vocoder unit decoding with speech frame to be decoded, decoded pcm stream is exported from the TDM interface, simultaneously the pcm stream from the input of TDM interface is encoded into speech frame, writes in the reception buffering area formation 302.DSP102 reads speech frame from send buffering area formation 301 process is as follows: DSP102 is access pointer buffering area formation 303 at first, read the write operation pointer (TxWrite Ptr) of the master cpu 101 of corresponding CHANNEL and the read operation pointer (Tx Read Ptr) of DSP102, DSP102 compares these two pointers, check whether the corresponding CHANNEL that sends buffering area formation 301 has speech frame, if speech frame is arranged, then from the corresponding CHANNEL that sends buffering area formation 301, read speech frame, then the read operation pointer of DSP102 (Tx Read Ptr) is added 1 and write back pointer buffering area 303.It is as follows that DSP102 writes the process that receives in the buffering area formation 302 with speech frame: DSP102 is access pointer buffering area formation 303 at first, read the read operation pointer (Rx Read Ptr) of the master cpu 101 of corresponding CHANNEL and the write operation pointer (RxWrite Ptr) of DSP102, DSP102 compares these two pointers, check whether the corresponding CHANNEL that receives buffering area formation 302 has the free time, if the free time is arranged, then speech frame is write among the corresponding CHANNEL that receives buffering area formation 302, then the write operation pointer of DSP102 (Rx Write Ptr) is added 1 and write back pointer buffering area 303.
Fig. 6,7,8 and Fig. 3,4,5 the main distinction be that whole vocoder unit among the DSP102 are shared one and sent buffering area formation 301 ' and one and receive buffering area formation 302 ', and each vocoder unit all has an independently formation among Fig. 3,4,5 in sending buffering area formation 301 and reception buffering area formation 302.Structure shown in general Fig. 3,4,5 needs more ram space than the structure shown in Fig. 6,7,8.Adopt the structure shown in Fig. 3,4,5, the corresponding vocoder unit of each CHANNEL, CHANNEL is the privately owned formation of this vocoder unit, other vocoder unit can not have access to the number of speech frames certificate of this vocoder unit, and master cpu 101 and DSP102 just can determine that when reading a speech frame this speech frame belongs to some vocoder unit.And the structure shown in employing Fig. 6,7,8, all vocoder unit are shared same formation, the speech frame that is stored in the formation must comprise control information, indicate the affiliated vocoder unit of this speech frame, master cpu 101 and DSP102 can not determine the ownership of this speech frame when reading a speech frame, could determine the vocoder unit under this speech frame after must resolving the control information that comprises in the speech frame.
At Fig. 6,7, in 8, it is as follows that master cpu 101 writes the process that sends buffering area formation 301 ' with speech frame: master cpu 101 is access pointer buffering area formation 303 ' at first, read the write operation pointer (Tx Write Ptr) of master cpu 101 and the read operation pointer (Tx Read Ptr) of DSP102, master cpu 101 compares these two pointers, check whether send buffering area formation 301 ' has the free time, if do not have the free time then alarm and withdraw from, if send the buffering area formation there is the free time, then write speech frame, then 101 pairs of write operation pointers (Tx Write Ptr) that send buffering area formation 301 of master cpu are added that the number that writes speech frame writes back pointer buffering area 303 ' again.Master cpu 101 reads speech frame from receive buffering area formation 302 ' process is as follows: master cpu 101 is access pointer buffering area formation 303 ' at first, read the read operation pointer (Rx Read Ptr) of master cpu 101 and the write operation pointer (Rx Write Ptr) of DSP102, master cpu 101 compares these two pointers, check whether receive buffering area formation 302 ' has speech frame, if speech frame is arranged, then from receive buffering area formation 302 ', read speech frame, then the read operation pointer of master cpu 101 (Rx Read Ptr) is added that the number of reading speech frame writes back pointer buffering area 303 '.
DSP102 reads speech frame from send buffering area formation 301 ' process is as follows: DSP102 is access pointer buffering area formation 303 ' at first, read the write operation pointer (Tx Write Ptr) of master cpu 101 and the read operation pointer (Tx Read Ptr) of DSP102, DSP102 compares these two pointers, check whether send buffering area formation 301 ' has speech frame, if speech frame is arranged, then from send buffering area formation 301 ', read speech frame, then the read operation pointer of DSP102 (Tx Read Ptr) is added that the speech frame number of reading writes back pointer buffering area 303 '.It is as follows that DSP102 writes the process that receives in the buffering area formation 302 ' with speech frame: DSP102 is access pointer buffering area formation 303 ' at first, read the read operation pointer (Rx Read Ptr) of master cpu 101 and the write operation pointer (Rx Write Ptr) of DSP102, DSP102 compares these two pointers, check whether receive buffering area formation 302 ' has the free time, if the free time is arranged, then speech frame is write in the reception buffering area formation 302 ', then the write operation pointer of DSP102 (RxWri te Ptr) is added that the number that writes speech frame writes back pointer buffering area 303 '.
Claims (8)
1. the vocoder device in the mobile communication system is characterized in that, comprises following part:
Master cpu is used for the speech frame behind the received code, and the vocoder unit that the speech frame that receives writes among the digital signal corresponding processor DSP is decoded, and reads the speech frame behind the vocoder unit coding among the corresponding digital signal processor DSP simultaneously;
N digital signal processor DSP has m vocoder unit in each digital signal processor DSP, can finish the codec functions of m road speech frame simultaneously; In DSP, also comprise a time division multiplexing tdm interface, be used for receiving and sending the pcm stream of voice;
Interruption generating logical unit is used for producing regularly interrupt signal and gives master cpu and digital signal processor DSP.
2. the vocoder device in the mobile communication system as claimed in claim 1 is characterized in that, the RAM of described digital signal processor DSP inside forms RAM Shared.
3. the vocoder device in the mobile communication system as claimed in claim 2 is characterized in that, described RAM Shared is divided into and sends buffering area, receives buffering area, pointer buffering area; Wherein send buffering area, be used for depositing speech frame to be decoded; Receive buffering area, be used for depositing the speech frame that digital signal processor DSP is finished coding; The pointer buffering area is used for depositing the operation pointer that sends buffering area and receive buffering area.
4. the vocoder device in the mobile communication system as claimed in claim 3, it is characterized in that, described operation pointer comprises that master cpu is to sending the write operation pointer of buffering area, master cpu is to receiving the read operation pointer of buffering area, DSP is to sending the read operation pointer of buffering area, and DSP is to receiving the write operation pointer of buffering area.
5. the speech frame dispatching method of a vocoder device as claimed in claim 1 is characterized in that, this method may further comprise the steps:
(1) after master cpu is received speech frame, waits for that interruption generating logical unit produces regularly interruption;
(2) interruption generating logical unit produces and interrupts giving master cpu and digital signal processor DSP;
(3) have no progeny in the master cpu response, speech frame is write the transmission buffering area of the corresponding vocoder unit correspondence of digital signal processor DSP, master cpu reads speech frame from receiving buffering area simultaneously;
(4) have no progeny in the digital signal processor DSP response, read speech frame from sending buffering area, give the vocoder unit decoding with speech frame to be decoded, decoded pcm stream is exported from the TDM interface, simultaneously the pcm stream from the input of TDM interface is encoded into speech frame, writes the reception buffering area.
6. the speech frame dispatching method of vocoder device as claimed in claim 5, it is characterized in that, step (3) also comprises: read read operation pointer and the write operation pointer that sends buffering area from the pointer buffering area, read operation pointer and the write operation pointer that sends buffering area compared, to judge whether corresponding C HANNEL has the free time to write speech frame, calculate the idle queues that sends in the buffering area thus, the write operation pointer of transmission buffering area is added 1 after, write back the pointer buffering area; Read read operation pointer and the write operation pointer that receives buffering area from the pointer buffering area, read operation pointer and the write operation pointer that receives buffering area compared, to judge whether the speech frame that need read is arranged among the corresponding C HANNEL, calculate the position that receives the speech frame in the buffering area thus, after the read operation pointer that receives buffering area added 1, write back the pointer buffering area.
7. the speech frame dispatching method of vocoder device as claimed in claim 5, it is characterized in that, step (4) also comprises: read read operation pointer and the write operation pointer that sends buffering area from the pointer buffering area, read operation pointer and the write operation pointer that sends buffering area compared, to judge whether corresponding C HANNEL has speech frame, calculate the position that sends the speech frame in the buffering area thus, the read operation pointer of transmission buffering area is added 1 after, write back the pointer buffering area; Read read operation pointer and the write operation pointer that receives buffering area from the pointer buffering area, read operation pointer and the write operation pointer that receives buffering area compared, to judge whether the speech frame that need read is arranged among the corresponding C HANNEL, calculate the idle queues that receives in the buffering area thus, after the write operation pointer that receives buffering area added 1, write back the pointer buffering area.
8. the speech frame dispatching method of vocoder device as claimed in claim 5 is characterized in that, what described timing was interrupted is the duration of a speech frame at interval, at an intercourse speech frame of all vocoder unit is handled.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134818 CN1236631C (en) | 2003-09-25 | 2003-09-25 | Vocoder unit for mobile communication system and its phonetic frame displayching method |
| PCT/CN2003/001119 WO2005029879A1 (en) | 2003-09-25 | 2003-12-25 | A vocoder equipment in mobile communication system and a method of speech frame scheduling |
| AU2003296208A AU2003296208A1 (en) | 2003-09-25 | 2003-12-25 | A vocoder equipment in mobile communication system and a method of speech frame scheduling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134818 CN1236631C (en) | 2003-09-25 | 2003-09-25 | Vocoder unit for mobile communication system and its phonetic frame displayching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1527624A CN1527624A (en) | 2004-09-08 |
| CN1236631C true CN1236631C (en) | 2006-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134818 Expired - Fee Related CN1236631C (en) | 2003-09-25 | 2003-09-25 | Vocoder unit for mobile communication system and its phonetic frame displayching method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1236631C (en) |
| AU (1) | AU2003296208A1 (en) |
| WO (1) | WO2005029879A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301868B (en) * | 2017-06-23 | 2020-07-14 | 杭州士兰微电子股份有限公司 | Audio decoding system and audio decoding method |
| CN108882064B (en) * | 2018-06-26 | 2021-02-02 | 潍坊学院 | Port data packet sending method and system based on GPON system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417232C (en) * | 2001-09-30 | 2008-09-03 | 中兴通讯股份有限公司 | Vocoder system using multiple port routing to communicate and its business frame exchanging method |
| US7177803B2 (en) * | 2001-10-22 | 2007-02-13 | Motorola, Inc. | Method and apparatus for enhancing loudness of an audio signal |
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2003
- 2003-09-25 CN CN 03134818 patent/CN1236631C/en not_active Expired - Fee Related
- 2003-12-25 WO PCT/CN2003/001119 patent/WO2005029879A1/en active Application Filing
- 2003-12-25 AU AU2003296208A patent/AU2003296208A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005029879A1 (en) | 2005-03-31 |
| CN1527624A (en) | 2004-09-08 |
| AU2003296208A1 (en) | 2005-04-11 |
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