CN102957905B - High image quality film radio transmitting method and device - Google Patents
High image quality film radio transmitting method and device Download PDFInfo
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Abstract
A kind of high image quality film radio transmitting method and device, it is adaptable to transmit a data packet of a video pictures of a high image quality film.The method includes receiving above-mentioned video pictures, and above-mentioned video pictures has a video pictures size；Needed for obtaining a payload length relevant to above-mentioned video pictures and a minimum required transmission time, the most above-mentioned minimum, the transmission time is to transmit above-mentioned video pictures to the shortest time limit needed for a receiving terminal；According to above-mentioned payload length, above-mentioned video pictures is carried out package to cut to obtain above-mentioned data packet；And according to transmitting the time needed for above-mentioned minimum, above-mentioned data packet is carried out scheduling, and it is sent to above-mentioned receiving terminal.The present invention still may conform to delay condition when radio condition is poor without there being the mistake of video pictures, and uses the transmission time needed for minimum to transmit the package of video pictures, more multi-user can be provided to view and admire high image quality film in limited frequency range.
Description
Technical field
The invention mainly relates to high image quality (High Definition, HD) film be wirelessly transferred, particularly relate to
A kind of method of film data package of scheduling and cutting high image quality in a medium access control layer and dress
Put.
Background technology
High image quality (HD) film refers to have more general image quality (Standard Definition, the SD) solution that film is high
The film of analysis degree (resolution), such as 1280 × 720 pixels (720pixel, 720p) or 1920 × 1080
The screen resolution of pixel (1080i/1080p).High image quality (HD) film is wirelessly transferred and is mainly used in playing height
Image quality digital image and sound optical disk (Digital Video Disc, DVD), Blu-ray Disc (Blue-ray Disc), height
Image quality Internet Protocol Television top box of digital machine (HD IPTV Set-top box) or high-quality movie projection etc., can solve
Certainly traditional wire transmission equipment lacks mobility, needs expensive high picture quantity multimedia interface (High
Definition Multimedia Interface, HDMI) transmission line and one-to-many user cannot be supported
Problem.
More and more higher in the ratio of residential use digital high-vision TV, by high image quality Internet Protocol Television number
Word machine top box, multiple user can watch the shadow of high image quality on different digital hd-tv simultaneously
Sheet, and exempt the trouble needing to arrange high picture quantity multimedia interface (HDMI) transmission line.Fig. 1 shows one
Domestic environment Communication Model 100.Domestic environment Communication Model 100 includes multiple stage digital high-vision TV
102 and a wireless high image quality Internet Protocol Television top box of digital machine 104.Wireless high image quality Internet Protocol Television top box of digital machine
104 may utilize various video pictures form (video frame format) (the most uncompressed or compression data),
Various antenna technologies (such as single-input single-output (SISO) or multiple-input and multiple-output (MIMO) and various regard
Frequently the technology such as picture compression mode (such as JPEG2000 or mpeg), is respectively sent to high image quality film
Each number of units word hd-tv 102.
In high image quality film is wirelessly transferred, packet error (packet error rate) is drawn with each video
Time of receiving terminal (wireless hd-tv 102) is arrived in face all can be affected and watch quality.Wherein, limited
Frequency range may affect picture error rate (frame error rate) and each video pictures and arrive at reception
The time of end (wireless hd-tv 102).In existing high image quality film radio transmitting method, generally make
Limit packet error method with one and an optimization transmission quantity method is wireless to carry out high image quality film
Transmission.In limiting packet error method, in order to lower packet error, (such as packet error limits
To 10-2Below), the payload length (payload length) of package is shortened, but is the increase in additional information
(overhead information), it is therefore desirable to the more time is transmitted.And in optimization transmission quantity side
In method, owing to the data transmission rate needed for being wirelessly transferred high image quality film is at a relatively high, in order to improve equally
Effective transmission rating (throughput) in time, increases the payload length of package.Although optimization is transmitted
The average transmission time of metering method is the shortest, but owing to the payload length of package becomes big, increases package wrong
Rate by mistake.
Summary of the invention
Because the problem of above-mentioned prior art, the invention provides a kind of high image quality film side of being wirelessly transferred
Method and device, can estimate a minimum required transmission under ensureing the quality needed for high image quality (HD) film
Time (Minimum Required Transmission Time, MRTT), and utilize the minimum estimated
The required transmission time (MRTT) is at medium access control layer (Medium Access Control layer, MAC
Layer) scheduling is made in.
A kind of high image quality film radio transmitting method that an embodiment according to present disclosure is provided, suitable
For transmitting a data packet of a video pictures of a high image quality film.The method includes receiving above-mentioned regarding
Frequently picture, above-mentioned video pictures has a video pictures size；Obtain relevant to above-mentioned video pictures
Needed for payload length and a minimum required transmission time, the most above-mentioned minimum, the transmission time regards for transmission is above-mentioned
Frequently picture is to the shortest time limit needed for a receiving terminal；According to above-mentioned payload length, above-mentioned video pictures is entered
Row package cuts to obtain above-mentioned data packet；And according to the time of transmitting needed for above-mentioned minimum by above-mentioned number
Carry out scheduling according to package, and be sent to above-mentioned receiving terminal.
A kind of high image quality film radio transmitting device that an embodiment according to present disclosure is provided, suitable
For transmitting a data packet of a video pictures of a high image quality film.This device includes a video source mould
Block, in order to receive above-mentioned video pictures；One medium access control control module, regards with above-mentioned in order to obtain
Frequently the payload length that picture the is relevant required transmission time minimum with one, during the required transmission of the most above-mentioned minimum
Between for transmitting above-mentioned video pictures to the shortest time limit needed for a receiving terminal；One enfeoffment unit, in order to root
According to above-mentioned payload length, above-mentioned video pictures is carried out package to cut to obtain above-mentioned data packet；And one
Medium access control scheduler, in order to carry out above-mentioned data packet according to the transmission time needed for above-mentioned minimum
Scheduling, and export to a physical layer to be sent to above-mentioned receiving terminal.
The present invention still may conform to delay condition when radio condition is poor without there being the mistake of video pictures,
And needed for using minimum, the transmission time transmits the package of video pictures, can provide more in limited frequency range
User views and admires high image quality film.
Accompanying drawing explanation
Fig. 1 shows a domestic environment Communication Model；
Fig. 2 shows a video pictures cutting schematic diagram；
Fig. 3 shows the flow process according to the high image quality film radio transmitting method described in one embodiment of the invention
Figure；
Fig. 4 shows the flow process according to the high image quality film radio transmitting method described in another embodiment of the present invention
Figure；
Fig. 5 shows according to the high image quality film radio transmitting device described in one embodiment of the invention；
Fig. 6 shows according to the high image quality film radio transmitting device described in another embodiment of the present invention；
Fig. 7 shows according to the high image quality film radio transmitting method described in one embodiment of the invention and previous skill
The minimum required transmission time that art is required when signal to noise ratio difference.
Wherein, description of reference numerals is as follows:
100～domestic environment Communication Model；
102～digital high-vision TV；
104～wireless high image quality Internet Protocol Television top box of digital machine；
200～video pictures cutting schematic diagram
202～video pictures；
204～video pictures cutting cube；
300,400～flow chart；
S302～S310, S402～S418～step；
500,600～high image quality film radio transmitting device；
502,602～video source module；
504,604～medium access control control module；
506,610～enfeoffment unit；
508,612～scheduler；
606～video pictures temporary storage location；
608～transmission performance improve unit；
614～transmission and measurement module.
Detailed description of the invention
As it has been described above, in high image quality film is wirelessly transferred, packet error (packet error rate) is with every
The time that one video pictures arrives at receiving terminal (the most wireless hd-tv 102) all can affect the product of watching
Matter.Therefore, it is necessary to according to instant tunnel condition, make suitably for the package payload length to be transmitted
Adjustment, and medium access control layer can be passed through when there being video pictures mistake (video frame error)
Retransmission mechanism (e.g.I-ACK) in (MAC layer) is revised.High image quality film provided by the present invention
Radio transmitting method and device can be after compressions or unpressed high image quality film is made on less frequency range
It is wirelessly transferred, it is possible to use in ultra-wideband (Ultra Wideband, UWB) technology or WiFi (11n) science and technology
Use.
In general, it is assumed that the reproduction time of a high image quality film is 120 minutes, per minute must dial
Amplify about 30 to 60 video pictures (video frames).In order to allow high image quality film at 120 minutes
Picture error rate (the frame needed for video pictures mistake (video frame error) is not had in reproduction time
Error rate) be a target picture error rate (target frame error rate), such as one 120 minutes
The target picture error rate of high image quality film be about 10-6.And when there being video pictures mistake to produce,
Can be revised by the retransmission mechanism of medium access control layer.In addition, in order to maintain high image quality shadow
The playback quality of sheet, receiving terminal (e.g. is wireless hd-tv 102) must be able to uninterrupted receive
Video pictures, therefore each video pictures arrive at receiving terminal (the most wireless hd-tv 102) time
Between can estimate at transmitting terminal (the most wireless high image quality Internet Protocol Television top box of digital machine 104), and send
End can arrive at the time catch cropping of receiving terminal according to video pictures and be correlated with scheduling, draws to avoid receiving terminal to receive video
The delay in face.High image quality film radio transmitting method provided by the present invention can meet a delay condition
(delay constraint).Assume that the picture transmission rate (frame rate) that this high image quality film is wirelessly transferred is every
Second 30 video pictures, and the decoding buffer (decoder buffer) of receiving terminal only can allow temporary one
Video pictures, next video pictures just must be sent to receiving terminal equal to every 1/30 second by this delay condition
Decoding buffer.If this delay condition cannot be met, receiving terminal decoding buffer possibly cannot be carried out immediately
Decoding, and cause video pictures mistake (video frame error).
Fig. 2 shows a video pictures cutting signal Figure 200.Video pictures cutting signal Figure 200 includes one
Video pictures 202 and multiple video pictures cutting cubes 204.As it has been described above, high image quality film is wirelessly transferred
Picture transmission rate can be 30 video pictures per second, such as can 30 video pictures 202 of transmission per second.
Video pictures 202 can be cut into many by transmitting terminal (the most wireless high image quality Internet Protocol Television top box of digital machine 104)
After individual video pictures cutting cube 204, video pictures cutting cube 204 is encapsulated respectively to package and transmits
To receiving terminal (the most wireless hd-tv 102).
In order to solve the problem of prior art, one embodiment of the invention provides a wireless biography of high image quality film
Transmission method.This high image quality film radio transmitting method can meet the target picture error rate of high image quality film
(such as 10-6).Special instruction, the high image quality film radio transmitting method of one embodiment of the invention is fixed
Transmission time (Required Transmission Time, RTT) needed for justice one, this required transmission time
(RTT) for the time limit needed for one video pictures of transmission, and this required transmission time (RTT) can meet mesh
Mark picture error rate (such as 10-6).The high image quality film radio transmitting method of the present invention is required except proposing
The transmission time (RTT), and the package of video pictures is adjusted for each video pictures (video frames)
Payload length and modulation encoding scheme (Modulation and Coding Scheme, MCS), thus
To the minimum required transmission time (Minimum Required Transmission Time, MRTT), wherein
Needed for this minimum, the transmission time (MRTT) is the shortest time limit needed for one video pictures of transmission.
Fig. 3 shows the flow chart according to the high image quality film radio transmitting method described in one embodiment of the invention
300.First, receive a video pictures, this video pictures have a video pictures size (such as 0.5Mb～
3Mb) (step S302).It follows that it is minimum with corresponding one to obtain a payload length (payload length)
The required transmission time (MRTT), wherein the minimum required transmission time is the time limit needed for transmission video pictures
(step S304).After obtaining this payload length transmission time required with corresponding minimum, long according to this payload
Degree carries out package and cuts with the data packet (step S306) obtaining this video pictures this video pictures.?
After, according to transmitting the time needed for this minimum, the data packet of this video pictures is carried out scheduling, and transmit
To receiving terminal (step S308).
Illustrating, defined in the present invention, the minimum required transmission time (MRTT) can be as following
Shown in formula one:
Formula one:
And meet following condition:
L≥0
Wherein D=video pictures size (bit, bits)；
γs=signal to noise ratio (signal to noise ratio, SNR)；
L=payload length (bit group, bytes)；
M=modulation encoding scheme (MCS)；
PeTarget picture error rate；
T ()=transmission one package required time, including additional information (overhead)；
NFThe package quantity that=mono-video pictures is cut into；
NR=transmission one video pictures package quantity, including re-transmission part (retransmission).
Formula two:
Wherein p=symbol error rate (symbol error rate)；
R ()=data transmission rate (data rate) (bps)；
Ot=additional information (second)；
The constant that e=is relevant to target picture error rate；
C=constant.
Fig. 4 shows the flow process according to the high image quality film radio transmitting method described in another embodiment of the present invention
Figure 40 0.First, receiving a video pictures, this video pictures has a video pictures size (such as
0.5Mb～3Mb) (step S402).Special instruction, first can postpone condition according to one (the most every
The decoding buffer that next video pictures must be sent to receiving terminal in 1/30 second) judge the video of this reception
Picture whether overtime, and when this video pictures overtime, remove above-mentioned video pictures, to transmit next
Individual video pictures (step S404).It follows that measure a signal to noise ratio (SNR) (step S406).Must note
Meaning, the measurement of this signal to noise ratio can be implemented by multiple method.In one embodiment, can be in often connecing
Receive a video pictures and just measure a signal to noise ratio, it is also possible in time per unit, measure a signal to noise ratio (example
Such as once per second to every n second once).Signal to noise ratio can directly be used to perform high image quality film and keep in wireless
The relevant operation of transmission, it is possible to be temporarily stored into a storage device and use for reading, and storage device can include
Volatibility and/or nonvolatile memory.After obtaining signal to noise ratio, according to this signal to noise ratio by a link setup sheet
(link adaptation table) selects modulation encoding scheme (MCS) (step S408).Such as work as signal to noise ratio
Time preferably, select the modulation encoding scheme transmitting less redundancy bit (redundant bit) to improve transmission
Rate, selects when signal to noise ratio is poor to transmit more redundant unit but the relatively low modulation encoding scheme of transfer rate.Should
It is the synopsis that predefined is good that link setup sheet can be one, and can be straight after obtaining signal to noise ratio
Connect and obtain, according to this link setup sheet, the modulation encoding scheme (MCS) that predefined is good.
It follows that obtain the parameter relevant to this modulation encoding scheme, including additional information (Ot(m)) and
Data transmission rate R (m) that this modulation encoding scheme is relevant and constant C (step S410).Further according to modulation
Encoding scheme (MCS) obtains symbol error rate (p) (step S412) with signal to noise ratio (SNR).Wherein symbol is wrong
Rate (p) is the symbol error rate under not having channel coding (channel coding) by mistake；In convolutional code
Under (convolutional code), symbol error rate (p) is then one first event mis rate (first event error
rate).It follows that in step S414, utilize have Fast Convergent characteristic Newton method (Newton ' s
Method) and formula two, a payload length and corresponding one minimum required transmission time (MRTT) are obtained.
Wherein, the minimum required transmission time is the time limit needed for transmission video pictures, and during the required transmission of this minimum
Between can meet target picture error rate；Payload length be then can needed for minimum in the transmission time by video
Picture is sent to the package payload length of the decoding buffer of receiving terminal.Obtain this payload length with corresponding
After the minimum required transmission time, according to this payload length, this video pictures is carried out package cutting (step
S416).Finally, transmit the time according to needed for this minimum, the package of this video pictures is carried out scheduling, defeated
Go out to physical layer to be sent to receiving terminal (step S418).
Fig. 5 shows according to the high image quality film radio transmitting device 500 described in one embodiment of the invention.Must
It is noted that only show at this and be wirelessly transferred relevant element with high image quality film, and other are drawn with high
Matter film is wirelessly transferred the element that running is unrelated, is those of ordinary skill in the art and is understood, at this not
Give and repeat to simplify explanation.High image quality film radio transmitting device 500 includes a video source (video
Stream source) module 502, medium access control control (MAC control) module 504.Wherein
Medium access control control module 504 also includes an enfeoffment (packetization) unit 506, Yi Jiyi
Scheduler (scheduler) 508.
Video source module 502 may be used to receive a video pictures, such as can be by high definition digital video-audio light
Dish, Blu-ray Disc or cable television read high image quality video source, and are sent to medium access control control mould
Block 504, wherein this video pictures has a video pictures size (such as 0.5Mb～3Mb).Medium accesses
It is minimum with one required that control control module 504 may be used to obtain a payload length relevant to this video pictures
The transmission time, the transmission time is for transmitting above-mentioned video pictures to needed for a receiving terminal needed for the most above-mentioned minimum
A shortest time limit.Enfeoffment unit 506 in medium access control control module 504 can take according to above-mentioned
The payload length obtained, carries out package and cuts with the data packet obtaining this video pictures this video pictures.
And the scheduler 508 in medium access control control module 504 can be incited somebody to action according to transmitting the time needed for this minimum
The data packet of this video pictures makees scheduling, and exports to physical layer to be sent to a receiving terminal.
Fig. 6 shows according to the high image quality film radio transmitting device 600 described in another embodiment of the present invention.
Must be noted that and only show at this and be wirelessly transferred relevant element with high image quality film, and other are with high
Image quality film is wirelessly transferred the element that running is unrelated, is those of ordinary skill in the art and is understood, at this
It will not go into details to simplify explanation.High image quality film radio transmitting device 600 includes a video source (video
Stream source) module 602, medium access control control (MAC control) module 604 and
Transmission and measurement module 614.Wherein medium access control control module 604 also includes a video pictures
Temporary (video frame buffer) unit 606, transmission performance improves (transmission performance
Improvement) unit 608, enfeoffment (packetization) unit 610 and a scheduler
(scheduler)612.Transmission and measurement module 614 may be used to perform Wireless transceiver high image quality shadow in physical layer
The operations such as the package of sheet and measurement signal to noise ratio (SNR).Transmission with measurement module 614 can include antenna,
Wireless simulation fundamental frequency unit, analog-digital converter, modulator, demodulator, encoder, decoder
Deng the related elements being wirelessly transferred for execution.Transmission and measurement module 614 can be used for measuring a signal to noise ratio
(SNR), wherein the measurement of this signal to noise ratio can be implemented by multiple method.In one embodiment, transmission
The control message coming from medium access control control module 604 can be received with measurement module 614, and
Just a signal to noise ratio is measured in often receiving a video pictures.In another embodiment, transmit and measure mould
Block 614 can also measure a signal to noise ratio (such as once per second to every n second is once) in time per unit.
Signal to noise ratio can directly be transferred back to medium access control control module 604 and keep in nothing to perform high image quality film
The relevant operation of line transmission, it is also possible to be temporarily stored into a storage device (not shown) for medium access control
Control module 604 processed reads and uses, and this storage device can include volatibility and/or non-volatile memories
Device.
Video source module 602 may be used to receive video pictures, such as can by high definition digital video-audio CD,
Blu-ray Disc or cable television read high image quality video source, and are sent to medium access control control module
604, wherein this video pictures has a video pictures size (such as 0.5Mb～3Mb).Medium access control
It is (the most every that video pictures temporary storage location 606 in control module 604 processed first can postpone condition according to one
The decoding buffer that next video pictures must be sent to receiving terminal in 1/30 second) judge the video of this reception
Picture whether overtime, and when this video pictures overtime, remove above-mentioned video pictures, to transmit next
Individual video pictures.Transmission performance improves unit 608 can be according to transmission and the letter measured by measurement module 614
Make an uproar ratio (SNR), a link setup sheet select modulation encoding scheme (MCS).This link setup sheet can be
One is the synopsis that predefined is good, and can directly allocate according to this link after obtaining signal to noise ratio
Table obtains the modulation encoding scheme (MCS) that predefined is good.Transmission performance improves unit 608 and can root
Additional information (O is obtained according to signal to noise ratio (SNR) and/or with modulation encoding scheme (MCS)t(m)) and this modulation
The parameters such as data transmission rate R (m), constant C and symbol error rate (p) that encoding scheme is relevant, and
And utilize Newton method (Newton ' s method) and the formula two with Fast Convergent characteristic, obtain a payload
The length required transmission time (MRTT) minimum with corresponding one.Wherein, the minimum required transmission time is for passing
Needed for time limit needed for defeated video pictures, and this minimum, the transmission time can meet target picture error rate；And
Payload length is then temporary for video pictures can be sent in the transmission time needed for minimum the decoding of receiving terminal
The package payload length of storage.Transmission performance improves unit 608 can be by the payload length obtained and minimum institute
(MRTT) need to be transmitted the time be sent to enfeoffment unit 610 and scheduler (scheduler) 612 and mediate to provide
Package cutting encapsulation in access control layer (MAC layer) and scheduling.Wherein enfeoffment unit 610 can root
Improve, according to transmission performance, the payload length that unit 608 obtains, video pictures is cut and is encapsulated as package；
And scheduler 612 can be according to catch cropping scheduling during transmission needed for minimum.Transmission and measurement module 614 can bases
The scheduling of scheduler 612 and modulation encoding scheme, the package produced by enfeoffment unit 610 performs entity
The modulation of layer and coding, and it is sent to receiving terminal.
Fig. 7 shows according to the high image quality film radio transmitting method described in one embodiment of the invention and previous skill
The minimum required transmission time that art is required when signal to noise ratio difference.The height that wherein embodiment of the present invention is provided
The concept of image quality film radio transmitting method use minimum required transmission time (MRTT), and prior art
The method of middle use is such as aforesaid restriction packet error method and optimization transmission quantity method.In limit
In packet error method processed, in order to lower packet error, (such as packet error limits to 10-2With
Under), the payload length (payload length) of package is shortened, but is the increase in additional information (overhead
Information), it is therefore desirable to the more time is transmitted, cause not meet when signal to noise ratio is relatively low and prolong
Late condition and the situation (MRTT is big in the relatively low time-varying of signal to noise ratio) of lost data package.Limit packet error
Rate method, under the conditions of not meeting delay, causes receiving terminal decoding buffer to be immediately decoded, and
Produce video pictures mistake.And in optimization transmission quantity method, owing to being wirelessly transferred high image quality film institute
The data transmission rate needed is at a relatively high, in order to improve the effective transmission rating (throughput) within the same time,
The payload length of package is increased.Although the average transmission time of optimization transmission quantity method is the shortest, but
Owing to the payload length of package becomes big, increase packet error, cause equally do not meet delay condition and
The situation of lost data package, and produce video pictures mistake.The high image quality that the embodiment of the present invention provides
Film radio transmitting method can meet the target picture error rate (such as 10 of high image quality film-6).This
Bright embodiment also defines required transmission time (RTT), and this required transmission time (RTT) regards for transmission one
Frequently the time limit needed for picture, and this required transmission time (RTT) can meet target picture error rate (such as
10-6).For each video pictures (video frames) adjust video pictures package payload length with
Modulation encoding scheme, thus transmission time (MRTT) needed for obtaining minimum, the minimum institute obtained by utilization
The time of transmitting need to carry out package cutting and scheduling.As it is shown in fig. 7, the embodiment of the present invention successfully overcomes
The restriction of prior art, still may conform to delay condition without there being video pictures when radio condition is poor
Mistake, and use the transmission time needed for minimum to transmit the package of video pictures, can carry in limited frequency range
High image quality film is viewed and admired for more multi-user.
Above paragraph uses multiple aspect to describe.Obvious, teaching herein may be implemented in a variety of ways,
And any certain architectures or the function that disclose in example are only a representational situation.According to religion herein
Showing, any those of ordinary skill in the art are it should be understood that each aspect of disclosing herein can independent implementation or two kinds
Above aspect can merge implementation.
Although the present invention discloses as above with preferred embodiment, so it is not limited to the present invention, any
Those of ordinary skill in the art, without departing from the spirit and scope of the present invention, when making a little change
With retouching, therefore protection scope of the present invention is when being defined in the range of standard depending on appended claim.
Claims (6)
1. a high image quality film radio transmitting method, it is adaptable to the video transmitting a high image quality film is drawn
One data packet in face, including:
Receive above-mentioned video pictures；
Obtain a payload length relevant to above-mentioned video pictures required transmission time minimum with one, Qi Zhongshang
Needed for stating minimum, the transmission time is to transmit above-mentioned video pictures to the shortest time limit needed for a receiving terminal；
According to above-mentioned payload length, above-mentioned video pictures is carried out package to cut to obtain above-mentioned data packet；
And
According to transmitting the time needed for above-mentioned minimum, above-mentioned data packet is carried out scheduling, and be sent to above-mentioned
Receiving terminal；
The most above-mentioned video pictures has a video pictures size, and obtains the transmission time needed for above-mentioned minimum
Step include:
According to above-mentioned video pictures size and a signal to noise ratio, adjust above-mentioned payload length and a modulation coding staff
Case；
The most above-mentioned modulation encoding scheme is according to above-mentioned signal to noise ratio, comparison list obtain；
Needed for the most above-mentioned minimum, the transmission time is the shortest time limit needed for one video pictures of transmission, and
And needed for above-mentioned minimum the transmission time meet a target picture error rate；
Described high image quality film radio transmitting method, also includes:
Transmitting the time needed for obtaining above-mentioned minimum according to following equation, wherein D is above-mentioned video pictures chi
Very little, L is above-mentioned payload length, and e is the function of above-mentioned target picture error rate, and p is a symbol error rate,
C is a constant, and R (m) is a transfer rate, and OtM () is an additional information:
2. high image quality film radio transmitting method as claimed in claim 1, the most above-mentioned symbol error rate
Obtain with above-mentioned modulation encoding scheme according to above-mentioned signal to noise ratio.
3. high image quality film radio transmitting method as claimed in claim 1, also includes:
The above-mentioned video pictures of conditional judgment whether overtime is postponed according to one；And
When above-mentioned video pictures overtime, remove above-mentioned video pictures.
4. a high image quality film radio transmitting device, it is adaptable to the video transmitting a high image quality film is drawn
One data packet in face, including:
One video source module, in order to receive above-mentioned video pictures；
One medium access control control module, in order to obtain a payload length relevant to above-mentioned video pictures
With the transmission time needed for a minimum required transmission time, the most above-mentioned minimum for transmitting above-mentioned video pictures extremely
A shortest time limit needed for one receiving terminal；
One enfeoffment unit, cuts in order to above-mentioned video pictures is carried out package according to above-mentioned payload length to take
Obtain above-mentioned data packet；And
One medium access control scheduler, in order to seal above-mentioned data according to the transmission time needed for above-mentioned minimum
Bag carries out scheduling, and exports to a physical layer to be sent to above-mentioned receiving terminal；
The most above-mentioned video pictures has a video pictures size, and above-mentioned medium access control control module
Needed for obtaining above-mentioned minimum, the transmission time includes according to above-mentioned video pictures size and a signal to noise ratio, in adjustment
State payload length and a modulation encoding scheme；
The most above-mentioned medium access control control module, according to above-mentioned signal to noise ratio, is obtained above-mentioned by comparison list
Modulation encoding scheme；
Needed for the most above-mentioned minimum, the transmission time is the shortest time limit needed for one video pictures of transmission, and
And needed for above-mentioned minimum the transmission time meet a target picture error rate；
The most above-mentioned medium access control control module passes needed for obtaining above-mentioned minimum always according to following equation
The defeated time, wherein D is above-mentioned video pictures size, and L is above-mentioned payload length, and e is that above-mentioned target is drawn
The function of face error rate, p is a symbol error rate, and C is a constant, and R (m) is a transfer rate, with
And OtM () is an additional information:
5. high image quality film radio transmitting device as claimed in claim 4, the most above-mentioned symbol error rate
Obtain with above-mentioned modulation encoding scheme according to above-mentioned signal to noise ratio.
6. high image quality film radio transmitting device as claimed in claim 4, also includes:
According to one, one video pictures temporary storage location, in order to postpone whether the above-mentioned video pictures of conditional judgment exceedes
Time, and when above-mentioned video pictures overtime, remove above-mentioned video pictures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110249613.5A CN102957905B (en) | 2011-08-23 | 2011-08-23 | High image quality film radio transmitting method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110249613.5A CN102957905B (en) | 2011-08-23 | 2011-08-23 | High image quality film radio transmitting method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102957905A CN102957905A (en) | 2013-03-06 |
| CN102957905B true CN102957905B (en) | 2016-08-31 |
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| CN107809669A (en) * | 2017-11-01 | 2018-03-16 | 五华薪火科技发展有限公司 | A kind of high image quality film radio transmitting method |
| CN116321289B (en) * | 2023-02-22 | 2023-10-17 | 北纬实捌(海口)科技有限公司 | Wireless transmission data packet length conversion system |
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| CN101184198A (en) * | 2006-11-17 | 2008-05-21 | Lg电子株式会社 | Method of optimizing data communication |
| CN101360209A (en) * | 2007-08-01 | 2009-02-04 | 索尼株式会社 | Method for selection of a user desired part of a video signal |
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| US20070162780A1 (en) * | 2006-01-10 | 2007-07-12 | Yao-Yi Wang | Method for controlling an operating frequency of a processor during playback of a recorded video |
| WO2011087905A1 (en) * | 2010-01-12 | 2011-07-21 | Quantenna Communications, Inc. | Quality of service and rate selection |
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| CN101184198A (en) * | 2006-11-17 | 2008-05-21 | Lg电子株式会社 | Method of optimizing data communication |
| CN101360209A (en) * | 2007-08-01 | 2009-02-04 | 索尼株式会社 | Method for selection of a user desired part of a video signal |
Non-Patent Citations (2)
| Title |
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| Adaptive cross-layer protection strategies for robust scalable video transmission over 802.11 wlans;KRISHMAMACHARI;《IEEE》;20031201;全文 * |
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