CN109348282A - A kind of wireless method and device for throwing screen time delay of reduction - Google Patents
A kind of wireless method and device for throwing screen time delay of reduction Download PDFInfo
- Publication number
- CN109348282A CN109348282A CN201811377801.4A CN201811377801A CN109348282A CN 109348282 A CN109348282 A CN 109348282A CN 201811377801 A CN201811377801 A CN 201811377801A CN 109348282 A CN109348282 A CN 109348282A
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- data packet
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- video data
- wireless
- time delay
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000011218 segmentation Effects 0.000 claims description 17
- 238000005538 encapsulation Methods 0.000 claims description 12
- 239000003550 marker Substances 0.000 description 10
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Screen technical field is thrown the present invention relates to wireless, discloses a kind of wireless method and device for throwing screen time delay of reduction, this method comprises: the wireless realtime transmission protocol RTP data packet thrown screen receiving end and receive video data；Obtain the flag bit of the RTP data packet；When the flag bit is 1, indicate that the realtime transmission protocol RTP data packet is the last one data packet of one-frame video data；One-frame video data where the RTP data packet is sent to decoder and is decoded output；Judge whether video data frame sends completely by the flag bit of RTP data packet, avoids waiting delay, reduce the time delay of decoded output.
Description
Technical field
Screen technical field more particularly to a kind of wireless method and device for throwing screen time delay of reduction are thrown the present invention relates to wireless.
Background technique
Miracast, which wirelessly throws screen technology, may be implemented the function of sharing screen-picture by WiFi.The transmitting terminal handle of picture
Picture carries out coding compression and obtains elementary stream ES (Element Stream), then ES stream is packaged into the elementary stream of packing
PES (Packet Element Stream), is finally packaged into PES the format of MPEG-TS, passes through realtime transmission protocol RTP
(Real-time Transport Protocol) transmits data to picture receiving end.The receiving end of picture receives RTP packet
After, remove RTP information, obtain MPEG-TS (Moving Picture Experts Group-Transport Stream,
Dynamic image transport stream) data, it is then fed into decoder and is decoded output.Due to PES feature, itself can not directly be defined
The end of a video frame is distinguished, a upper video only could be clearly known after the head information for receiving next PES
Frame end.Such direct result is to have to receive next video frame, a video frame can be just distinguished, to send
It goes to decode, brings the delay of at least one frame.
Summary of the invention
It is a primary object of the present invention to propose a kind of wireless method and device for throwing screen time delay of reduction, pass through RTP data
The flag bit of packet judges whether video data frame sends completely, avoids waiting delay, reduces the time delay of decoded output.
To achieve the above object, a kind of wireless method for throwing screen time delay of reduction provided by the invention, comprising:
The wireless realtime transmission protocol RTP data packet thrown screen receiving end and receive video data；
Obtain the flag bit of the RTP data packet；When the flag bit is 1, the realtime transmission protocol RTP number is indicated
It is the last one data packet of one-frame video data according to packet；
One-frame video data where the RTP data packet is sent to decoder and is decoded output.
Optionally, it is also wrapped before the wireless realtime transmission protocol RTP data packet for throwing screen receiving end reception video data
It includes:
One-frame video data is encapsulated as the elementary stream PES data packet being packaged by wireless screen transmitting terminal of throwing；
By the PES packet segmentation at several realtime transmission protocol RTP data packets；
If RTP data packet is the last one data packet of the one-frame video data, by the mark of the RTP data packet
Position is assigned a value of 1, otherwise, the flag bit of the realtime transmission protocol RTP data packet is assigned a value of 0.
Optionally, one-frame video data is encapsulated as the elementary stream PES data being packaged by the wireless screen transmitting terminal of throwing
Packet specifically:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
Optionally, it is described by the PES packet segmentation at several realtime transmission protocol RTP data packets specifically:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
Optionally, the flag bit is set in the head information of the RTP data packet.
As another aspect of the present invention, the device of screen time delay is wirelessly thrown in a kind of reduction provided, comprising:
Receiving module receives the realtime transmission protocol RTP data packet of video data for wirelessly throwing screen receiving end；
Module is obtained, for obtaining the flag bit of the RTP data packet；When the flag bit is 1, indicate described real-time
Transport protocol RTP data packet is the last one data packet of one-frame video data；
Decoder module, for by the one-frame video data where the RTP data packet be sent to decoder be decoded it is defeated
Out.
Optionally, further includes:
Package module, for wirelessly throw screen transmitting terminal by one-frame video data be encapsulated as be packaged elementary stream PES number
According to packet；
Divide module, is used for the PES packet segmentation into several realtime transmission protocol RTP data packets；
Assignment module will be described if being the last one data packet of the one-frame video data for RTP data packet
The flag bit of RTP data packet is assigned a value of 1, otherwise, the flag bit of the realtime transmission protocol RTP data packet is assigned a value of 0.
Optionally, the package module specifically:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
Optionally, the segmentation module specifically:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
Optionally, the flag bit is set in the head information of the RTP data packet.
The wireless method and device for throwing screen time delay of a kind of reduction proposed by the present invention, this method comprises: wireless screen of throwing receives
End receives the realtime transmission protocol RTP data packet of video data；Obtain the flag bit of the RTP data packet；When the flag bit
When being 1, indicate that the realtime transmission protocol RTP data packet is the last one data packet of one-frame video data；By the RTP number
Decoder, which is sent to, according to the one-frame video data where packet is decoded output；Video is judged by the flag bit of RTP data packet
Whether data frame sends completely, avoids waiting delay, reduces the time delay of decoded output.
Detailed description of the invention
Fig. 1 is the flow chart for the method that screen time delay is wirelessly thrown in a kind of reduction that the embodiment of the present invention one provides；
Fig. 2 is another flow chart for reducing the wireless method for throwing screen time delay that the embodiment of the present invention one provides；
Fig. 3 is a kind of exemplary block diagram of the wireless device for throwing screen time delay of reduction provided by Embodiment 2 of the present invention；
Fig. 4 is another demonstrative structure frame for reducing the wireless device for throwing screen time delay provided by Embodiment 2 of the present invention
Figure.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment one
As shown in Figure 1, in the present embodiment, a method of it reducing wireless throw and shields time delay, comprising:
S10, the wireless realtime transmission protocol RTP data packet thrown screen receiving end and receive video data；
S20, the flag bit for obtaining the RTP data packet；When the flag bit is 1, the real-time transport protocol is indicated
RTP data packet is the last one data packet of one-frame video data；
S30, it the one-frame video data where the RTP data packet is sent to decoder is decoded output.
In the present embodiment, judge whether video data frame has sent by the flag bit of RTP data packet (Marker)
It is whole, waiting delay is avoided, the time delay of decoded output is reduced.
In the present embodiment, Marker are set in the head information of the RTP data packet, can carry some relevant
Specific information, the present embodiment distinguish whether video data frame terminates according to this.The wireless screen receiving end Miracast of throwing receives RTP
After data packet, the position Marker of RTP is judged, if Marker is 0, continue to data, if Marker is 1, show
One-frame video data finishes receiving, and sends to decoder immediately and is decoded output.
As shown in Fig. 2, in the present embodiment, before the step S10 further include:
One-frame video data is encapsulated as the elementary stream PES data packet being packaged by S01, wireless screen transmitting terminal of throwing；
S02, by the PES packet segmentation at several realtime transmission protocol RTP data packets；
If S03, RTP data packet are the last one data packet of the one-frame video data, by the RTP data packet
Flag bit is assigned a value of 1, otherwise, the flag bit of the realtime transmission protocol RTP data packet S04, is assigned a value of 0.
In the present embodiment, the step S01 specifically:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
In the present embodiment, the step S02 specifically:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
As another embodiment, the size of the MPEG-TS data packet may be the integral multiple of 188bytes.
Embodiment two
As shown in figure 3, in the present embodiment, a kind of wireless device for throwing screen time delay of reduction, comprising:
Receiving module 10 receives the realtime transmission protocol RTP data packet of video data for wirelessly throwing screen receiving end；
Module 20 is obtained, for obtaining the flag bit of the RTP data packet；When the flag bit is 1, the reality is indicated
When transport protocol RTP data packet be one-frame video data the last one data packet；
Decoder module 30 is decoded for the one-frame video data where the RTP data packet to be sent to decoder
Output.
In the present embodiment, judge whether video data frame has sent by the flag bit of RTP data packet (Marker)
It is whole, waiting delay is avoided, the time delay of decoded output is reduced.
In the present embodiment, Marker are set in the head information of the RTP data packet, can carry some relevant
Specific information, the present embodiment distinguish whether video data frame terminates according to this.The wireless screen receiving end Miracast of throwing receives RTP
After data packet, the position Marker of RTP is judged, if Marker is 0, continue to data, if Marker is 1, show
One-frame video data finishes receiving, and sends to decoder immediately and is decoded output.
As shown in figure 4, in the present embodiment, reducing the wireless device for throwing screen time delay further include:
Package module 40, for wirelessly throw screen transmitting terminal by one-frame video data be encapsulated as be packaged elementary stream PES
Data packet；
Divide module 50, is used for the PES packet segmentation into several realtime transmission protocol RTP data packets；
Assignment module 60 will be described if being the last one data packet of the one-frame video data for RTP data packet
The flag bit of RTP data packet is assigned a value of 1, otherwise, the flag bit of the realtime transmission protocol RTP data packet is assigned a value of 0.
In the present embodiment, the package module specifically:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
In the present embodiment, the segmentation module specifically:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
As another embodiment, the size of the MPEG-TS data packet may be the integral multiple of 188bytes.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of wireless method for throwing screen time delay of reduction characterized by comprising
The wireless realtime transmission protocol RTP data packet thrown screen receiving end and receive video data；
Obtain the flag bit of the RTP data packet；When the flag bit is 1, the realtime transmission protocol RTP data packet is indicated
For the last one data packet of one-frame video data；
One-frame video data where the RTP data packet is sent to decoder and is decoded output.
2. a kind of wireless method for throwing screen time delay of reduction according to claim 1, which is characterized in that the wireless throwing screen connects
Receiving end receives before the realtime transmission protocol RTP data packet of video data further include:
One-frame video data is encapsulated as the elementary stream PES data packet being packaged by wireless screen transmitting terminal of throwing；
By the PES packet segmentation at several realtime transmission protocol RTP data packets；
If RTP data packet is the last one data packet of the one-frame video data, the flag bit of the RTP data packet is assigned
Value is 1, otherwise, the flag bit of the realtime transmission protocol RTP data packet is assigned a value of 0.
3. a kind of wireless method for throwing screen time delay of reduction according to claim 2, which is characterized in that the wireless throwing screen hair
One-frame video data is encapsulated as the elementary stream PES data packet being packaged by sending end specifically:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
4. a kind of wireless method for throwing screen time delay of reduction according to claim 3, which is characterized in that described by the PES
Packet segmentation is at several realtime transmission protocol RTP data packets specifically:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
5. a kind of wireless method for throwing screen time delay of reduction according to claim 1, which is characterized in that the flag bit setting
In the head information of the RTP data packet.
6. a kind of wireless device for throwing screen time delay of reduction characterized by comprising
Receiving module receives the realtime transmission protocol RTP data packet of video data for wirelessly throwing screen receiving end；
Module is obtained, for obtaining the flag bit of the RTP data packet；When the flag bit is 1, the real-time Transmission is indicated
Protocol RTP data packet is the last one data packet of one-frame video data；
Decoder module is decoded output for the one-frame video data where the RTP data packet to be sent to decoder.
7. the wireless device for throwing screen time delay of a kind of reduction according to claim 6, which is characterized in that further include:
Package module, for wirelessly throw screen transmitting terminal by one-frame video data be encapsulated as be packaged elementary stream PES data packet；
Divide module, is used for the PES packet segmentation into several realtime transmission protocol RTP data packets；
Assignment module, if being the last one data packet of the one-frame video data for RTP data packet, by the RTP number
It is assigned a value of 1 according to the flag bit of packet, otherwise, the flag bit of the realtime transmission protocol RTP data packet is assigned a value of 0.
8. the wireless device for throwing screen time delay of a kind of reduction according to claim 7, which is characterized in that the package module tool
Body are as follows:
One-frame video data coding is compressed into elementary stream ES data packet by wireless throwing screen transmitting terminal；
Head Information encapsulation by the ES data packet and PES is the elementary stream PES data packet being packaged.
9. the wireless device for throwing screen time delay of a kind of reduction according to claim 8, which is characterized in that the segmentation module tool
Body are as follows:
By the PES packet segmentation at several MPEG-TS data packets, the size of the MPEG-TS data packet is
188bytes；
It is several realtime transmission protocol RTP data packets by several described MPEG-TS packet encapsulations.
10. the wireless device for throwing screen time delay of a kind of reduction according to claim 6, which is characterized in that the flag bit is set
It is placed in the head information of the RTP data packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377801.4A CN109348282A (en) | 2018-11-19 | 2018-11-19 | A kind of wireless method and device for throwing screen time delay of reduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811377801.4A CN109348282A (en) | 2018-11-19 | 2018-11-19 | A kind of wireless method and device for throwing screen time delay of reduction |
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| CN109348282A true CN109348282A (en) | 2019-02-15 |
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| CN201811377801.4A Pending CN109348282A (en) | 2018-11-19 | 2018-11-19 | A kind of wireless method and device for throwing screen time delay of reduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113316028A (en) * | 2020-02-27 | 2021-08-27 | 华为技术有限公司 | Screen projection method, screen projection equipment and storage medium |
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