CN1829343A - Mobile station with self-adaptive multi-speed coding frame buffer - Google Patents
Mobile station with self-adaptive multi-speed coding frame buffer Download PDFInfo
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- CN1829343A CN1829343A CNA2005100241263A CN200510024126A CN1829343A CN 1829343 A CN1829343 A CN 1829343A CN A2005100241263 A CNA2005100241263 A CN A2005100241263A CN 200510024126 A CN200510024126 A CN 200510024126A CN 1829343 A CN1829343 A CN 1829343A
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Abstract
The present invention refers to universal mobile communication system traveling platform for reducing voice frame lose and raising wireless resource utilization rate. It includes a first in first out (FIFO) buffer connected with self adaptation voice encoder output, voice frame coded sequence stored in said buffer, in the choice of transmission format combination, using self adaptation multiple rate pattern information in voice frame coded sequence to raise wireless channel utilization efficiency and reducing voice frame lose rate. Said traveling platform suitable receiving non uniform mode sent self adaptation multiple rate frame contains first in first out (FIFO) buffer connected with self adaptation voice encoder voice encoder output, self adaptation multiple rate encoding frame stored in said buffer, capable of adjusting self adaptation multiple rate encoding frame according to reception condition.
Description
Technical field
The present invention relates to a kind of travelling carriage of universal mobile telecommunications system, particularly a kind of travelling carriage of avoiding in the speech transmissions process, losing self-adaptive multi-speed coding frame.
Background technology
Universal mobile telecommunications system (UMTS) has been introduced transmission channel and transformat combination, periodicity in the time interval from the logic channel data dispatching to transmission channel, this time interval is called Transmission Time Interval (TTI), data are to be sent out in given Transmission Time Interval (TTI) interim according to transformat (TF), and this transformat has also been fixed size, number, error correction coding mode and the parameters of rate matching that will be sent out data block.The transformat tabulation that is used to make up the transmission channel of compound channel has constituted transformat combination (TFC).Radio Resource control (RRC) unit is that medium are got involved control unit MAC and physical layer configurations transmission format composite set (TFCS).Selection is for the suitable transformat of each transmission channel, during corresponding delivery time interval (TTI), send the data of logic channel in the inherent transmission channel of being correlated with, transmission channel is selected to make the combination (TFC) of transformat belong to transmission format composite set (TFCS).In the specification of relevant universal mobile telecommunications system (UMTS) standard, usually above operation is called " transformat combination (TFC) selection ".
Effectively adaptive multi-rate (AMR) coded frame is the bit of 3 or 2 or 1 class (class), transmission channel of the bit stealing of every class.Prior art is used is the transformat combination of 20 milliseconds of Transmission Time Intervals (TTI) of fixing, send adaptive multi-rate (AMR) frame with the bit of dispatching a class of an adaptive multi-rate (AMR) frame with a transformat in this combination to the mode on the transmission channel of this form, 1 frame of the per 20 milliseconds of outputs of adaptive multi-rate (AMR) encoder is carried by the transmission block in 20 milliseconds of Transmission Time Intervals (TTI), when each transport format combination selection according to the transformat of selected each the class corresponding transmission channel of pattern of the coded frame of adaptive multi-rate (AMR) encoder output, the form of the form of the transmission channel of voice data and the transmission channel of other data has constituted transformat combination together, and this transformat combination is the valid transport format combination in the transmission format composite set certainly.
The structure of travelling carriage as shown in figure 12, variable Rate voice encryption device is wherein finished the function of adaptive multi-rate (AMR) coding, the central processing unit of operational communications protocol stack sofeware is provided with the pattern of variable Rate voice encryption device, and be responsible for result's (transformat combination) that transformat combination (TFC) is selected is sent to channel encoder, channel encoder according to transformat combination to signaling data, from adaptive multi-rate (AMR) the coded frame voice data of variable Rate voice encryption device and grouped data is encoded and multiplexing process, the memory cell that channel encoder is placed adaptive multi-rate (AMR) coded frame of its generation from the variable Rate voice encryption device reads adaptive multi-rate (AMR) coded frame; Channel decoder is finished channel-decoding and is generated adaptive multi-rate (AMR) coded frame, and the variable Rate voice decoder reads adaptive multi-rate (AMR) coded frame from the memory cell of placement adaptive multi-rate (AMR) coded frame of channel decoder and deciphers.
Summary of the invention
The technical problem that solves
Each transport format combination selection described in background at adaptive multi-rate (AMR) coded frame come from adaptive multi-rate (AMR) encoder, promptly, adaptive multi-rate (AMR) encoder refreshes the memory cell of once placing adaptive multi-rate (AMR) coded frame with adaptive multi-rate (AMR) coded frame that generate for per 20 milliseconds, and channel encoder reads adaptive multi-rate (AMR) coded frame wherein and encodes and multiplexing from this memory cell for per 20 milliseconds.And transport format combination selection will be subject to transport format combination set when carry out selecting and closes effective those combinations of transport formats in (TFCS), often owing to the quick variation of channel, the signaling message and the switching of burst make effective transport format combination set not have to transmit effective combinations of transport formats of adaptive multi-rate (AMR) the speech coding frame that reads in real time in closing from said memory cells, thereby adaptive multi-rate (AMR) coded frame is lost.The reason that above-mentioned phenomenon takes place is: the selected best transmission channel format combination of 8 kinds of adaptive multi-rate (AMR) pattern (TFC) at the current wireless environment of moment and universal mobile telecommunications system (UMTS) is inconsistent with adaptive multi-rate (AMR) pattern of present frame, and adjusting adaptive multi-rate (AMR) pattern needs certain time delay.
Technical scheme
The encoding scheme of the adaptive multi-rate of travelling carriage (AMR) is among the present invention: in the voice call process, it is 20 milliseconds Speech frame that adaptive multi-rate (AMR) encoder obtains length by the sampling to the input voice signal, each Speech frame contains the sample of 20 milliseconds of speeches, to 20 milliseconds of Speech frame codings, what described coding produced is adaptive multi-rate (AMR) coded frame that meets universal mobile telecommunications system (UMTS) standard, need the wave point functional unit to send the voice data of adaptive multi-rate (AMR) coded frame form, the wave point functional unit sends described voice data by the transformat of each transmission channel, its feature also is, send coded command to adaptive multi-rate (AMR) encoder, described coded command has been specified a plurality of adaptive multi-rate (AMR) pattern, effective Speech frame coded sequence that adaptive multi-rate (AMR) encoder is produced 20 milliseconds of Speech frames coding according to described coded command, it is the set of a plurality of adaptive multi-rate (AMR) speech coding frame, it is an adaptive multi-rate (AMR) coded frame of mourning in silence, when described Speech frame coded sequence was a plurality of adaptive multi-rate (AMR) speech coding frame, the pattern of its adaptive multi-rate (AMR) coded frame was consistent with the adaptive multi-rate in the described coded command (AMR) pattern; Adaptive multi-rate (AMR) encoder according to described coded command to 20 milliseconds of Speech frame coding produced be invalid Speech frame coded sequence the time, it is not encoded on the radio frames and sends, above-mentioned explanation about the Speech frame coded sequence is exactly the definition of the Speech frame coded sequence among the present invention.
Can not find effective combinations of transport formats with adaptive multi-rate (AMR) the speech coding frame scheduling that from said memory cells, reads in real time this problem to the transmission channel in order to solve what " technical problem that will solve " mentioned, in travelling carriage of the present invention, first in first out (FIFO) buffer memory has substituted the Speech frame coded sequence that original memory cell is accepted the output of adaptive multi-rate (AMR) encoder.
The invention provides the travelling carriage in a kind of universal mobile telecommunications system, the output that the adaptive multi-rate of this travelling carriage (AMR) encoder produces the Speech frame coded sequence to 20 milliseconds of length Speech frame codings, and this travelling carriage comprises first in first out (FIFO) buffer memory that is connected with adaptive multi-rate (AMR) encoder output, and this first in first out (FIFO) buffer memory comprises:
-Data Input Interface is used to read in the Speech frame coded sequence that adaptive multi-rate (AMR) encoder encodes produces,
-data output interface is used for reading stored Speech frame coded sequence from this first in first out (FIFO) buffer memory,
-store status interface is used for exporting the quantity of the Speech frame coded sequence that this first in first out (FIFO) buffer memory stores and the type of Speech frame coded sequence wherein.
Depositing when being restricted to a Speech frame coded sequence of first in first out (FIFO) buffer memory, in the time can't sending speech in 20 milliseconds, when promptly not carrying out read operation in 20 milliseconds, this Speech frame coded sequence can by follow-up write cover.For fear of the phenomenon that is capped, can be convenient to behind 20 milliseconds of failing to read, have an opportunity to read at the Speech frame coded sequence of above-mentioned first in first out (FIFO) buffer memory more than 2.
Travelling carriage reads the type of pending Speech frame coded sequence from the store status interface of described first in first out (FIFO) buffer memory, when pending Speech frame coded sequence is the effective Speech frame coded sequence that need to send, be that this Speech frame coded sequence selects transformat combination, transmit a adaptive multi-rate (AMR) coded frame in this Speech frame coded sequence with selected transformat combination.
Prior art is used is the transformat combination of 20 milliseconds of Transmission Time Intervals (TTI) of fixing, send adaptive multi-rate (AMR) frame with the bit of dispatching a class of an adaptive multi-rate (AMR) frame with a transformat in this combination to the mode on the transmission channel of this form, the present invention will no longer take the mode of the constant transmissions time interval (TTI), the substitute is, be that the described pending Speech frame coded sequence that needs to send selects the variable transformat combination of Transmission Time Interval (TTI), for example using Transmission Time Interval (TTI) is adaptive multi-rate (AMR) frame that 10 milliseconds transformat combination goes to transmit a pattern in the Speech frame coded sequence.
Can decide the value of Transmission Time Interval (TTI) according to the quantity of the Speech frame coded sequence of storage in the first in first out (FIFO), a kind of method is when the quantity of the Speech frame coded sequence of storage in the described first in first out (FIFO) surpasses the number of appointment, preferred Transmission Time Interval (TTI) is 10 milliseconds a transformat combination, and the present invention advises that the number of described appointment is 1.
Travelling carriage equally also can receive unfixed adaptive multi-rate (AMR) the frame transformat combination that comprises of Transmission Time Interval (TTI), the present invention proposes the travelling carriage in a kind of universal mobile telecommunications system, this travelling carriage comprises first in first out (FIFO) buffer memory that is connected with adaptive multi-rate (AMR) decoder input, and this first in first out (FIFO) buffer memory comprises:
-Data Input Interface is used to read in adaptive multi-rate (AMR) coded frame,
-data output interface is used for reading stored adaptive multi-rate (AMR) coded frame from this first in first out (FIFO) buffer memory,
-store status interface is used for exporting the length of adaptive multi-rate (AMR) the coded frame formation that this first in first out (FIFO) buffer memory stores and the type of coded frame,
-control unit is used for being stored in according to delete instruction deletion adaptive multi-rate (AMR) coded frame of free of data (NO_DATA) type of adaptive multi-rate (AMR) the coded frame formation in first in first out (FIFO) buffer memory.
For the influence that reduces to cause, can after adaptive multi-rate (AMR) coded frame of described first in first out (FIFO) buffer memory more than 2, begin to adaptive multi-rate (AMR) the many speed of decoder input adaptive (AMR) coded frame by adaptive multi-rate (AMR) frame delay.
Beneficial effect
Among the present invention, adaptive multi-rate (AMR) encoder output is multimodal adaptive multi-rate (AMR) coded frame in first in first out (FIFO) buffer memory, and this multi-mode has the transmission channel format combination to be complementary with it.For the unexpected variation that descends, switches or dispatch effective transmission channel format combination (TFC) that burst high priority logic channel causes because of physical channel rate suddenly, promptly operable transmission channel format combination no longer comprises the employed transmission channel format combination of travelling carriage (TFC) before this in the transmission channel format composite set (TFCS).The output of multimodal adaptive multi-rate (AMR) encoder can be used for mating the unexpected variation of described effective transmission channel format combination (TFC) in the method for the present invention, promptly dispatch adaptive multi-rate (AMR) coded frame of the sort of patterns different in the Speech frame coded sequence pending in first in first out (FIFO) buffer memory with adaptive multi-rate (AMR) pattern of travelling carriage transmission before with new available transmission channel format combination (TFC), thereby minimizing descends suddenly because of physical channel rate, the frame losing of the Speech frame that switching or scheduling burst high priority logic channel cause is compared the present invention and can be selected best transmission channel format combination (TFC) at adaptive multi-rate (AMR) pattern of all universal mobile telecommunications system (UMTS) and the Radio Resource of travelling carriage in the shorter time with background technology.
Caching mechanism among the present invention has overcome per 20 milliseconds of the prior art must be finished the transmission of an adaptive multi-rate (AMR) Speech frame or abandon this restriction, can accomplish delayed delivery because use method of the present invention, make to switch like this and the coded frame of adaptive multi-rate (AMR) the encoder output of scheduling burst high priority logic channel during seizing still can obtain transmitting, and in background technology switch and scheduling burst high priority logic channel seize Radio Resource during adaptive multi-rate (AMR) coded frame that can occur in the memory cell be not read the phenomenon that just is refreshed.
Of the present invention another helpful be embodied in it and can adjust the timing that first in first out (FIFO) cache read is got adaptive multi-rate (AMR) coded frame, when first in first out (FIFO) buffer memory writes with time for reading at interval greater than 10 milliseconds, can be sent in adaptive multi-rate (AMR) coded frame in first in first out (FIFO) buffer memory with the transformat combination of 10 milliseconds of Transmission Time Intervals (TTI) to reduce the described time interval that writes and read.
Description of drawings
Fig. 1 is the interface block diagram of first in first out (FIFO) buffer memory of adaptive multi-rate (AMR) encoder.
Fig. 2 to Fig. 6 be travelling carriage 0 to 80 millisecond shown in the form 1 during this period of time in handle the schematic diagram of the Speech frame coded sequence in first in first out (FIFO) buffer memory.
Fig. 2 is the schematic diagram before 0 millisecond of first in first out (FIFO) many speed of buffer memory output adaptive (AMR) coded frame.
Fig. 3 is the schematic diagram when 0 millisecond of first in first out (FIFO) many speed of buffer memory output adaptive (AMR) coded frame.
Adaptive multi-rate when Fig. 4 represents 35 milliseconds (AMR) encoder is to the schematic diagram of first in first out (FIFO) buffer memory output Speech frame coded sequence.
Fig. 5 is the schematic diagram before 40 milliseconds of first in first out (FIFO) many speed of buffer memory output adaptive (AMR) coded frame.
Fig. 6 is the schematic diagram when 40 milliseconds of first in first out (FIFO) many speed of buffer memory output adaptive (AMR) coded frame.
Fig. 7 is the interface block diagram of first in first out (FIFO) buffer memory of adaptive multi-rate (AMR) decoder.
Fig. 8 is the schematic diagram that travelling carriage is handled continuous 5 adaptive multi-rate (AMR) coded frame to Figure 11.
Fig. 8 is the schematic diagram when sending free of data (NO_DATA) frame to first in first out (FIFO) buffer memory.
Fig. 9 is that first in first out (FIFO) buffer memory sends the schematic diagram of adaptive multi-rate (AMR) frame to the variable Rate decoder after receiving free of data (NO_DATA) frame.
Figure 10 is adaptive multi-rate (AMR) the frame schematic diagram afterwards that first in first out (FIFO) buffer memory receives 2 10 milliseconds Transmission Time Intervals (TTI).
Figure 11 is that first in first out (FIFO) buffer memory receives the schematic diagram of deleting a free of data (NO_DATA) frame after adaptive multi-rate (AMR) frame of 2 10 milliseconds Transmission Time Intervals (TTI).
Figure 12 is a universal mobile telecommunications system (UMTS) mobile phone basic functional block diagram.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, first in first out (FIFO) buffer memory is between adaptive multi-rate (AMR) encoder and the channel encoder, adaptive multi-rate (AMR) encoder per 20 milliseconds to Speech frame coded sequence of first in first out (FIFO) buffer memory output, first in first out in the drawings (FIFO) buffer memory is used for storing the Speech frame coded sequence, the type that central processing unit is read pending Speech frame coded sequence by the interface shown in the figure 6, central processing unit can send the coded command that comprises a plurality of adaptive multi-rate (AMR) pattern by the interface shown in the figure 8 to adaptive multi-rate (AMR) encoder.
Table 1 has provided an example, this example illustrated in form 10 to 80 millisecond during this period of time in the transmission channel format combination (TFC) done according to the Speech frame coded sequence that is written in first in first out (FIFO) buffer memory select, and the result who how selects according to transmission channel format combination (TFC) reads adaptive multi-rate (AMR) coded frame in the Speech frame coded sequence in first in first out (FIFO) buffer memory.
| Time (millisecond) | Speech frame coded sequence in first in first out (FIFO) buffer memory | Pending Speech frame coded sequence and type thereof | The form and the Transmission Time Interval (TTI) that are used for speech in the transformat combination of selecting | Adaptive multi-rate (AMR) frame to channel encoder output | |
| 0 | 5 | 5, pattern 1+ mode 7 | (81,103,60), 20 | Mode | 7 |
| 15 | 4 | ||||
| 20 | 4 | 4, pattern 1+ | Do not have | Do not have | |
| 35 | 4，3 | ||||
| 40 | 4，3 | 4, pattern 1+ mode 7 | (49,54), 10 milliseconds | Pattern 1 | |
| 50 | 3 | 3, pattern 1+ pattern 2 | (55,63), 20 milliseconds | Pattern 2 | |
| 55 | 2 | ||||
| 60 | 2 | 2, pattern 1+ pattern 2 | Inapplicable | Inapplicable | |
| 70 | 2 | 2, pattern 1+ pattern 2 | (55,63), 10 milliseconds | Pattern 2 | |
| 75 | 1 | 1, pattern 1+ | |||
| 80 | 1 | 5, pattern 1+ mode 7 | (81,103,60), 20 | Mode | 7 |
Form 1
What store in first in first out (FIFO) buffer memory during indicated 0 millisecond of Fig. 2 table is Speech frame coded sequence 5, shown in the table 1, this moment central processing unit to read pending Speech frame coded sequence by the interface shown in the figure 6 be effective Speech frame
Coded sequence 5, its type is a pattern 1+ mode 7, the result that the transmission channel format combination of carrying out on the central processing unit (TFC) is selected is that a Transmission Time Interval (TTI) is 20 milliseconds combination, 3 forms that wherein comprise the transmission channel that is used for speech, 1 form is 1 * 89 bit, another is 1 * 103 bit, and also having one is 1 * 60 bit.In fact this result specifies and adaptive multi-rate (AMR) frame of the mode 7 in the Speech frame coded sequence 5 will be put on the transmission channel, among Fig. 3 501 is exactly adaptive multi-rate (AMR) frame of this mode 7, concrete operation is such, central processing unit sends according to comprising 1 * 89 bit to channel encoder by interface 7, the instruction that the transformat combination of 1 * 103 bit and these 3 speech transmissions forms of 1 * 60 bit is encoded, this will make it send the operation of reading adaptive multi-rate (AMR) coded frame 501 of mode 7 in first in first out (FIFO) the buffer memory Speech frame coded sequence 5, and this operation is shifted out first in first out (FIFO) buffer memory with Speech frame coded sequence 5.
When table 1 is shown in 20 milliseconds, it is effective Speech frame coded sequence 4 that central processing unit is read pending Speech frame coded sequence by the interface shown in the figure 6, its type is a pattern 1+ mode 7, the result that transmission channel format combination (TFC) is selected is the transformat combination that does not have the energy transporting speech, there is a lot of reasons all can cause such result (physical channel variation, high priority logic channel and switching), so do not read Speech frame coded sequence 4 this moment from first in first out (FIFO) buffer memory.
What store in first in first out when Fig. 4 represents 35 milliseconds (FIFO) buffer memory is Speech frame coded sequence 4, adaptive multi-rate (AMR) encoder is to first in first out (FIFO) buffer memory output Speech frame coded sequence 3 simultaneously, the type of Speech frame coded sequence 3 is pattern 1+ patterns 2, compared with a last Speech frame coded sequence 4 change has taken place, i.e. the change of the pattern in the coded command of central processing unit has reflected in Speech frame coded sequence 3.
What store in first in first out when Fig. 5 represents 40 milliseconds (FIFO) buffer memory is Speech frame coded sequence 4 and 3, shown in the table 1, this moment is because the quantity of the Speech frame coded sequence of storing in first in first out (FIFO) buffer memory has surpassed 1, the transformat combination of preferred 10 milliseconds Transmission Time Interval (TTI), the result that transmission channel format combination this moment (TFC) is selected is that a Transmission Time Interval (TTI) is 10 milliseconds combination, 2 forms that wherein comprise the transmission channel that is used for speech, 1 form is 1 * 49 bit, another is 1 * 54 bit, and in fact this result specifies and adaptive multi-rate (AMR) frame of the pattern in the Speech frame coded sequence 41 will be put on the transmission channel.Among Fig. 6 401 is exactly adaptive multi-rate (AMR) frame of this pattern 1, concrete operation is such, central processing unit sends the instruction of encoding according to the transformat combination that comprises 1 * 49 bit and these 2 speech transmissions forms of 1 * 54 bit by interface 7 to channel encoder, this will make it send the operation of reading adaptive multi-rate (AMR) coded frame 401 of pattern 1 in first in first out (FIFO) the buffer memory Speech frame coded sequence 4, and this operation is shifted out first in first out (FIFO) buffer memory with Speech frame coded sequence 4.
The Speech frame coded sequence 2 that writes during owing to 55 milliseconds shown in the table 1 just is read out in the time of 70 milliseconds, write with time for reading and exceed 10 milliseconds at interval, because transmission channel format combination (TFC) selects to can be used for shortening said write and time for reading interval, so the result that transmission channel format combination (TFC) is selected in the time of 70 milliseconds selects the transformat combination of 10 milliseconds of Transmission Time Intervals (TTI) for use, i.e. " (55; 63); 10 milliseconds " shown in the table, this compares operation of reading when this will make 80 milliseconds and 75 milliseconds write operation operation that of the time interval and the last time of operation bigger minimizing has been arranged.
In the patent No. that I submit to is these chapters and sections of embodiment of specification of 2004100680567 patent, explanation was arranged about the execution mode of the variable rate coding device of the output Speech frame coded sequence of Fig. 1 in Fig. 6, the concrete page number is 12 pages to 14 pages, and relevant figure is Fig. 1 and the Fig. 2 in this patent specification accompanying drawing.
Referring to Fig. 7, first in first out (FIFO) buffer memory is between variable Rate decoder and the channel decoder, channel decoder regularly carries out decode operation by 10 milliseconds of frames, generation adaptive multi-rate (AMR) frame message that central processing unit sends by interface 14 receive channel decoders, central processing unit can send adaptive multi-rate (AMR) to channel decoder by interface 14
Frame outputs to the instruction of first in first out (FIFO) buffer memory; Central processing unit can read the length of adaptive multi-rate (AMR) the coded frame formation of storing in first in first out (FIFO) buffer memory and the type of these coded frame by interface 13, sends to first in first out (FIFO) buffer memory by interface 13 every 20 milliseconds of central processing units and deletes the wherein order of designated frame; Central processing unit can send the instruction of reading adaptive multi-rate (AMR) frame by interface 18 to the variable Rate decoder.
Referring to Fig. 8, because channel decoder is not received the radio frames that comprises adaptive multi-rate (AMR) frame during 2 10 milliseconds of frames regularly, send the indication of no adaptive multi-rate (AMR) frame by interface 14 to central processing unit, central processing unit sends the instruction of output free of data (NO_DATA) frame 12 to first in first out (FIFO) buffer memory by interface 14 to channel decoder, and, in first in first out this moment (FIFO) 2 adaptive multi-rate (AMR) frame 15 and 16 is arranged, central processing unit sends the instruction that adaptive multi-rate (AMR) frame is read into adaptive multi-rate (AMR) decoder from first in first out (FIFO) buffer memory by interface 18 to the variable Rate decoder, as shown in Figure 9, receive adaptive multi-rate (AMR) coded frame 16 that this instruction back adaptive multi-rate (AMR) decoder is read from first in first out (FIFO) buffer memory.
Ensuing 2 10 milliseconds frame time channel decoder decodes 2 adaptive multi-rate (AMR) frame 11 and 10, and after finishing, each adaptive multi-rate (AMR) frame decoding sends generation adaptive multi-rate (AMR) frame message to central processing unit by interface 14, central processing unit sends the instruction that adaptive multi-rate (AMR) frame is outputed to first in first out (FIFO) buffer memory by interface 14 to channel decoder after receiving this kind message at every turn, and Figure 10 shows the situation of receiving the frame of storing in this 2 adaptive multi-rate (AMR) frame first in first out (FIFO) buffer memory afterwards.Central processing unit is by interface 13 information of free of data (NO_DATA) frame 12 of having obtained first in first out (FIFO) buffer memory, send the instruction of deletion this free of data (NO_DATA) frame, the situation of carrying out the frame of storing in first in first out (FIFO) buffer memory after this instruction as shown in figure 11.
Claims (7)
1. the travelling carriage in the universal mobile telecommunications system, the output that the adaptive multi-rate of this travelling carriage (AMR) encoder produces the Speech frame coded sequence to 20 milliseconds of length Speech frame codings, and this travelling carriage comprises first in first out (FIFO) buffer memory that is connected with adaptive multi-rate (AMR) encoder output, and this first in first out (FIFO) buffer memory comprises:
-Data Input Interface is used to read in the Speech frame coded sequence that adaptive multi-rate (AMR) encoder encodes produces,
-data output interface is used for reading stored Speech frame coded sequence from this first in first out (FIFO) buffer memory,
-store status interface is used for exporting the quantity of the Speech frame coded sequence that this first in first out (FIFO) buffer memory stores and the type of Speech frame coded sequence wherein;
Read the type of pending Speech frame coded sequence from the store status interface of described first in first out (FIFO) buffer memory, when pending Speech frame coded sequence is the effective Speech frame coded sequence that need to send, be that this Speech frame coded sequence selects transformat combination, transmit a adaptive multi-rate (AMR) coded frame in this Speech frame coded sequence with selected transformat combination.
2. travelling carriage as claimed in claim 1 is characterized in that,
At the Speech frame coded sequence of described first in first out (FIFO) buffer memory more than 2.
3. as the travelling carriage of claim 1 or 2, it is characterized in that,
For the described pending Speech frame coded sequence that needs to send is selected the variable transformat combination of Transmission Time Interval (TTI).
4. travelling carriage as claimed in claim 3 is characterized in that,
When the quantity of the Speech frame coded sequence of storage in the described first in first out (FIFO) surpassed the number of appointment, preferred Transmission Time Interval (TTI) was 10 milliseconds a transformat combination.
5. travelling carriage as claimed in claim 4 is characterized in that,
The number of described appointment is 1.
6. the travelling carriage in the universal mobile telecommunications system, this travelling carriage comprises first in first out (FIFO) buffer memory that is connected with adaptive multi-rate (AMR) decoder input, this first in first out (FIFO) buffer memory comprises:
-Data Input Interface is used to read in adaptive multi-rate (AMR) coded frame,
-data output interface is used for reading stored adaptive multi-rate (AMR) coded frame from this first in first out (FIFO) buffer memory,
-store status interface is used for exporting the length of adaptive multi-rate (AMR) the coded frame formation that this first in first out (FIFO) buffer memory stores and the type of coded frame,
-control unit is used for being stored in according to delete instruction deletion adaptive multi-rate (AMR) coded frame of free of data (NO DATA) type of adaptive multi-rate (AMR) the coded frame formation in first in first out (FIFO) buffer memory.
7. travelling carriage as claimed in claim 6 is characterized in that,
Beginning is to adaptive multi-rate (AMR) the many speed of decoder input adaptive (AMR) coded frame after adaptive multi-rate (AMR) coded frame of described first in first out (FIFO) buffer memory more than 2.
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| CN2005100241263A CN1829343B (en) | 2005-03-01 | 2005-03-01 | Mobile station with self-adaptive multi-speed coding frame buffer |
| PCT/CN2005/001803 WO2006050657A1 (en) | 2004-11-11 | 2005-10-31 | Method and device for adaptive multi-rate coding and transporting speech |
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| CN2005100241263A CN1829343B (en) | 2005-03-01 | 2005-03-01 | Mobile station with self-adaptive multi-speed coding frame buffer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806399A (en) * | 2016-02-19 | 2016-07-27 | 西安航天动力技术研究所 | Measurement parameter hybrid framing method of missile-borne recorder |
| CN108574684A (en) * | 2017-03-14 | 2018-09-25 | 大唐移动通信设备有限公司 | A kind of method and apparatus of decompression |
| CN113992764A (en) * | 2021-10-29 | 2022-01-28 | 上海航天计算机技术研究所 | High-reliability measurement and control data transmission channel multiplexing method and system for deep space probe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0006803A (en) * | 1999-12-10 | 2001-12-11 | Lucent Technologies Inc | System and method to reduce speech delay and improve speech quality using half-blocks |
| US7010001B2 (en) * | 2000-01-10 | 2006-03-07 | Qualcomm, Incorporated | Method and apparatus for supporting adaptive multi-rate (AMR) data in a CDMA communication system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105806399A (en) * | 2016-02-19 | 2016-07-27 | 西安航天动力技术研究所 | Measurement parameter hybrid framing method of missile-borne recorder |
| CN105806399B (en) * | 2016-02-19 | 2018-02-16 | 西安航天动力技术研究所 | A kind of missile-borne recorder measurement parameter mixes framing method |
| CN108574684A (en) * | 2017-03-14 | 2018-09-25 | 大唐移动通信设备有限公司 | A kind of method and apparatus of decompression |
| CN108574684B (en) * | 2017-03-14 | 2020-08-28 | 大唐移动通信设备有限公司 | Decompression method and device |
| CN113992764A (en) * | 2021-10-29 | 2022-01-28 | 上海航天计算机技术研究所 | High-reliability measurement and control data transmission channel multiplexing method and system for deep space probe |
| CN113992764B (en) * | 2021-10-29 | 2023-04-11 | 上海航天计算机技术研究所 | High-reliability measurement and control data transmission channel multiplexing method and system for deep space probe |
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