CN102348117A - System of transmitting digital high definition signal with low bandwidth, method thereof and network multimedia television - Google Patents
System of transmitting digital high definition signal with low bandwidth, method thereof and network multimedia television Download PDFInfo
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Abstract
The invention provides a system of transmitting a digital high definition signal with low bandwidth, a method thereof and a network multimedia television. The system comprises a network memory, a code rate detection system, a frame extracting processing unit, a user bandwidth detection system and the network multimedia television. The network memory is used for storing film resource. The code rate detection system is used for detecting a code rate of the film resource and determining whether the code rate of the film resource exceeds a standard or not. The frame extracting processing unit is used for carrying out frame extracting on a high definition film resource, and decreasing the code rate. The user bandwidth detection system is used for detecting user bandwidth and providing different quality sources suitable for a user bandwidth environment. The network multimedia television decodes a received signal, carries out conversion based on motion estimation and compensation frame rate transition, and inserts a transition frame between original frames. The invention has the following advantages that: through enforcement of the present invention, on the premise of basically not changing original source image quality, contradiction between signal quality and bandwidth occupation is alleviated, high definition transmission and on-line high definition playing with low bandwidth occupation are realized.
Description
Technical field
The invention belongs to multimedia technology field, relate in particular to a kind of system, method and network multimedia TV of low bandwidth transmission of digital high-definition signal.
Background technology
Along with popularizing day by day and the integration of three networks of the Internet and DTV, internet television emerges.Each Virtual network operator, each medium, participate in household electrical appliances production commercial city, and released one after another oneself service and product, and internet television becomes a kind of trend.
In the Network Transmission, it is a pair of contradiction that high-quality audio-video signal and low bandwidth take, and the transmission of high-quality audio-video signal means to take relative more bandwidth.Solve the method for this contradiction, adopt audio frequency and video compression coding technology efficiently exactly.Under the prerequisite that guarantees the audio frequency and video quality, high compression ratio is that source coding technique is pursued; Such as, the H.264/MPEG4AVC coding of high compression rate, can make the data transfer rate of a HDTV program; 15-16Mbps by MPEG2 drops to 6-7Mbps, and program quality is identical.Under the situation of present main flow network bandwidth 2Mbps, transmission high definition program has difficulties, even if along with the quickening of network broadband construction, when main cities broadband speed generally reaches the 4Mbps left and right sides, transmit high-definition signal, still has certain difficulty.
Therefore, the problem of system and method that needs a kind of new transmission of digital high-definition signal to exist above solving.
Summary of the invention
The object of the present invention is to provide a kind of system, method and network multimedia TV of low bandwidth transmission of digital high-definition signal; To solve the signal quality that exists under the existing network environment and the contradiction between the bandwidth occupancy, the problem that promptly low bandwidth can not the transmission of digital high-definition signal.
The present invention realizes like this; A kind of system of low bandwidth transmission of digital high-definition signal; Comprise network memory, code check detection system, take out frame processing unit, user bandwidth detection system and network multimedia TV; Said network memory is used to store film source, and said code check detection system is used for the code check of film source is detected, and judges whether the code check of film source exceeds standard; The said frame processing unit of taking out is used for the high definition film source is taken out frame, reduces code check, is stored in network memory as the clear film source of low vertical frame dimension; Said user bandwidth detection system is used for the detection to user bandwidth, and the information source of the different quality that is fit to the user bandwidth environment is provided, and supplies online playing or download; Said network multimedia TV is to received signal decoding, and through based on estimation and compensated frame rate transition up conversion, between primitive frame, inserts transition frames.
The technical scheme that the present invention takes also comprises: it is the high definition film source that said code check detection system detects film source; Then said film source is stored to network memory as original high definition film source; It is the SD film source that said code check detection system detects film source, does not then deal with, and directly is stored to the webserver.
The technical scheme that the present invention takes also comprises: said network multimedia TV comprises decoder module, image zoom and frame replication module, estimation and compensating module, display module; Said decoder module is decoded for the clear information source of low vertical frame dimension that comes from network that receives; Said image zoom and frame replication module to decoded signal carry out image zoom and low duplicate wait processing after, export signal to estimation and compensating module, said estimation and compensating module detect signal; Reject duplicated frame wherein; Extract the primitive frame signal,, in the middle of primitive frame, insert transition frames through estimation and compensation; And signal carried out up-conversion process, input to display module and show.
Another technical scheme that the present invention takes is: a kind of method of low bandwidth transmission of digital high-definition signal comprises: step a, terminal Connection Service device also begin buffering; The connection of step b, sense terminals, speed of download, whether the judgment data transmission bandwidth reaches the condition of play-overing the high definition film source, if then directly transmit unpressed high definition film source, if not, then get into step c; Whether the connection of step c, sense terminals, speed of download, judgment data transmission bandwidth reach the condition of playing the low clear film source of vertical frame dimension, if then transmit through taking out the high definition film source that frame is handled, if not, then get into steps d; Steps d, server transmit through the SD film source to the terminal.
The technical scheme that the present invention takes also comprises: among the said step c; Taking out the frame processing is specially: the code check detection system is used for the code check of film source is detected; Whether the code check of judging film source exceeds standard; Through taking out frame processing unit it is taken out frame for the high definition film source, reduce code check, be stored in network memory as the clear film source of low vertical frame dimension.
The technical scheme that the present invention takes also comprises: the said frame processing unit of taking out is taken out the frame processing to the high definition film source, reduces code check to 4Mbps.
The technical scheme that the present invention takes also comprises: the said frame processing unit of taking out is taken out the frame processing to the high definition film source, takes out in the process of frame compression, reduces the quantity of P frame and B frame, and the quantity of I frame is constant.
The technical scheme that the present invention takes also comprises: said step c also comprises: when terminal reception process is taken out the high definition film source of frame processing; To received signal decoding; And, between primitive frame, insert transition frames through frame-rate conversion up conversion based on estimation and compensation.
The another technical scheme that the present invention takes is: a kind of network multimedia TV; Comprise decoder module, display module, image zoom and frame replication module and estimation and compensating module; Said decoder module is decoded for the information source that comes from network that receives; Said display module is used for becoming image to show conversion of signals, and said image zoom and frame replication module are used for decoded signal is carried out image zoom and low replication processes; Said estimation and compensating module are used for signal is detected, and reject duplicated frame wherein, extract the primitive frame signal; Through estimation and compensation; In the middle of primitive frame, insert transition frames, and signal is carried out up-conversion process, input to display module and show.
Beneficial effect of the present invention is: the present invention reduces code check through in the reduction of information source end to the original source frame per second, guarantees that picture quality is constant basically, reaches the purpose of saving transmission bandwidth; At display terminal, FRC (frame-rate conversion) up conversion through based on ME/MC (estimation and compensation) inserts transition frames between primitive frame, makes picture smooth, remedies frame per second and reduces the motion picture jitter problem that brings; The present invention is not changing under the prerequisite of original source picture quality basically, and the contradiction between mitigation signal quality and the bandwidth occupancy has realized the high definition transmission that low bandwidth takies, and has realized online high definition broadcast.
Description of drawings
Fig. 1 is the fundamental diagram of system of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention.
Fig. 2 is that the method server end of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention is taken out the flow chart that frame is handled automatically.
Fig. 3 is that the method server end of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention is distributed the flow chart of film source automatically.
Fig. 4 is the structural representation of embodiment of the invention network multimedia TV.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, the fundamental diagram of the system of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention.The system of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention comprises the code check detection system, takes out frame processing unit, network memory, consumer wideband detection system and network multimedia TV.Wherein, the code check detection system, taking out frame processing unit, network memory and consumer wideband detection system and can be positioned at server end, also can be the entity that monomer exists.The code check detection system is used for the code check of film source is detected, and judges whether the code check of film source exceeds standard, and for the high definition film source, this film source is stored to network memory as original high definition film source; In addition, also it is taken out frame, reduce code check to 4Mbps,, supply user online playing or the download of bandwidth at 4Mbps as hanging down the different units that the clear film source of vertical frame dimension is stored in network memory through taking out frame processing unit for the high definition film source; For the film source less than 2Mbps, promptly the SD film source because of present most of network can transmit, does not therefore deal with, and directly is stored to the webserver, supplies online playing or download.The user bandwidth detection system provides the information source of the different quality that is fit to the user bandwidth environment to the detection of user bandwidth, supplies online playing or download.For 4Mbps bandwidth user, can receive through taking out the low frame per second high-definition signal that frame processing unit is taken out frame, realize high definition transmission and online playing under the lower bandwidth condition.Network environment for some areas is better, and data transfer bandwidth can reach the user of 10-20Mbps, can receive without taking out the original high definition film source of frame.The network multimedia TV receiving signal; To received signal decoding, and through FRC (the Frame rate Conversion based on ME/MC (motion estimation/motion compensation, estimation and compensation); Frame-rate conversion) up conversion; Between primitive frame, insert transition frames, make picture smooth, remedy frame per second and reduce the motion picture jitter problem that brings.
ME/MC (motion estimation/motion compensation, estimation and compensation) technology is through motion detection is carried out in moving object; Generate motion vector, and then produce compensated frame, in original picture shows; Increase a frame or a few frame movement compensating frame, the reduction of frame per second has not reduced the picture quality of each frame; And the sense of beating of the picture that reduces to cause of frame per second can be able to remedy through the ME/MC interpolation and the frame rate up-conversion of receiving terminal; Make picture level and smooth, so just remedied at signal end because frame per second reduces the incoherent problem of float that causes.
In embodiments of the present invention, for original digital high-definition signal, guarantee through taking out frame, to reduce code check under the constant basically situation of picture quality, to reduce the data bandwidth of transmission.Frame per second is big more, and picture is more smooth; Frame per second is more little, and picture has the sense of beating more.If code check is a variable, then frame per second also can influence volume, and frame per second is high more, and each second, the picture of process was many more, and the code check that needs is also high more, and volume is also big more.In the code stream of compression, generally be divided into I frame, P frame and B frame, the volume ratio of I frame and P frame is bigger, and the volume ratio of B frame is less.The code stream that with the frame per second is 30fps is an example, if frame per second is reduced to 15fps, in the process of taking out the frame compression, minimizing be P frame and B frame, the quantity of I frame is constant, the code stream of taking out behind the frame can be reduced to 60% of original bit stream.Code stream with the 720P/30 frame is an example, and original code stream is generally 4-6Mbps, after taking out the frame compression, can reduce to 2.4-3.6Mbps.Like this, just reached under the constant basically situation of picture quality, saved the purpose of data transfer bandwidth.
See also Fig. 2, take out the process chart of frame automatically for the method server end of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention, it may further comprise the steps:
S201, server receive film source or the code stream of uploading;
S202, server code check detection system detect the code check of film source; If surpassing server, code check sets scope; This this scope is decided by server admin personnel or user according to the actual requirements); Judge whether the code check of film source is lower than the code check of SD film source, if execution in step S203, otherwise execution in step S204;
S203, directly be stored to webserver primary importance, webserver position-specific is in storage SD film source;
S204, the high definition film source that code check is higher than the SD film source are stored to webserver position two, are exclusively used in storage high definition film source;
S205, the high definition film source that code check is higher than the SD film source are taken out the frame processed compressed;
S206, the high definition film source that will take out after the frame processed compressed are stored to webserver position three, are exclusively used in storage through taking out the high definition film source that frame is handled.
See also Fig. 3, distribute the flow chart of film source automatically, may further comprise the steps for the method network server end of the low bandwidth transmission of digital high-definition signal of the embodiment of the invention:
S301, terminal are connected to server and begin buffering;
Connection, the speed of download of S302, server detection system sense terminals, whether the judgment data transmission bandwidth can reach the condition of play-overing the high definition film source, if execution in step S303, otherwise execution in step S304;
S303, terminal are continued the film source that buffering connects, and are play-overed the high definition film source;
Whether connection, the speed of download of S304, server detection system sense terminals, judgment data transmission bandwidth can reach the condition of playing the low clear film source of vertical frame dimension, if execution in step S305, otherwise execution in step S306;
S 305, server transmit through taking out the film source of frame processed compressed;
S306, server transmit the SD film source to the terminal.
Wherein, server if the SD film source is carried out same processing, when then being lower than the SD code stream for bandwidth, can transmit the more film source of low code stream when compressing.
See also Fig. 4, be the structural representation of the network multimedia TV of the embodiment of the invention.The network multimedia TV of the embodiment of the invention comprises decoder module, image zoom and frame replication module, estimation and compensating module and display module.Decoder module is decoded for the clear information source of low vertical frame dimension that comes from network that receives, image zoom and frame replication module to decoded signal carry out image zoom and low duplicate wait processing after, export signal to estimation and compensating module.Estimation and compensating module detect signal, reject duplicated frame wherein, extract the primitive frame signal; Through estimation and compensation; In the middle of primitive frame, insert the transition frames of several frames, and signal is carried out up-conversion process, input to display module and show.The network multimedia television operations principle of the embodiment of the invention is: receive low frame (like 15 frames) the high definition information source of input; Be decoded as the LVDS signal of 50/60Hz (50 frames/60 frames) through decoder module; By image zoom and frame replication module decoded signal is carried out image zoom and frame replication processes again, and export estimation and compensating module to; Because this frame duplicates frame before the just repetition, does not produce new frame, the exercise performance of the signal that therefore duplicates through frame does not change, and still has float, discontinuous problem; Estimation and compensating module detect the LVDS signal of 50/60Hz (50 frames/60 frames), reject duplicated frame wherein, extract the primitive frame signal; Through estimation and compensation, in the middle of primitive frame, inserting the transition frames of several frames again, is 100/120Hz (100 frames/120 frames) signal with the signal transformation of 50/60Hz (50 frames/60 frames); Reduce data transfer bandwidth through taking out frame; Estimation and compensating module interpolation through receiving terminal refill the frame of taking out, and have so just accomplished do not changing basically under the prerequisite of original image quality; Low bandwidth transmission of high-definition signal is exported to display module display frame again.What inserted this moment is the new transition frames through estimation and compensation, and therefore, picture is smooth.
The present invention reduces code check through in the reduction of information source end to the original source frame per second, guarantees that picture quality is constant basically, reaches the purpose of saving transmission bandwidth; At display terminal, FRC (frame-rate conversion) up conversion through based on ME/MC (estimation and compensation) inserts transition frames between primitive frame, makes picture smooth, remedies frame per second and reduces the motion picture jitter problem that brings; The present invention is not changing under the prerequisite of original source picture quality basically, and the contradiction between mitigation signal quality and the bandwidth occupancy has realized the high definition transmission that low bandwidth takies, and has realized online high definition broadcast.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the system of a low bandwidth transmission of digital high-definition signal comprises network memory, and said network memory is used to store film source, it is characterized in that, also comprises:
Code check detection system: be used for the code check of film source is detected, judge whether the code check of film source exceeds standard;
Take out frame processing unit: be used for the high definition film source is taken out frame, reduce code check, be stored in network memory as the clear film source of low vertical frame dimension;
User bandwidth detection system: be used for user bandwidth is detected, the information source of the different quality that is fit to the user bandwidth environment is provided, supply online playing or download;
Network multimedia TV:, and, between primitive frame, insert transition frames, and show through based on estimation and compensated frame rate transition up conversion to received signal decoding.
2. the system of low bandwidth transmission of digital high-definition signal as claimed in claim 1; It is characterized in that; It is the high definition film source that said code check detection system detects film source, then said film source is stored to network memory as original high definition film source, and it is the SD film source that said code check detection system detects film source; Then do not deal with, directly be stored to the webserver.
3. according to claim 1 or claim 2 the system of low bandwidth transmission of digital high-definition signal is characterized in that said network multimedia TV comprises decoder module, image zoom and frame replication module, estimation and compensating module, display module; Said decoder module is decoded for the clear information source of low vertical frame dimension that comes from network that receives; Said image zoom and frame replication module are carried out image zoom and low replication processes to decoded signal, and export signal to estimation and compensating module, and said estimation and compensating module detect signal; Reject duplicated frame wherein; Extract the primitive frame signal,, in the middle of primitive frame, insert transition frames through estimation and compensation; And signal carried out up-conversion process, input to display module and show.
4. the method for a low bandwidth transmission of digital high-definition signal comprises:
Step a, terminal Connection Service device also begin buffering;
The connection of step b, sense terminals, speed of download, whether the judgment data transmission bandwidth reaches the condition of play-overing the high definition film source, if then directly transmit unpressed high definition film source, if not, then get into step c;
Whether the connection of step c, sense terminals, speed of download, judgment data transmission bandwidth reach the condition of playing the low clear film source of vertical frame dimension, if then transmit through taking out the high definition film source that frame is handled, if not, then get into steps d;
Steps d, server transmit through the SD film source to the terminal.
5. the method for low bandwidth transmission of digital high-definition signal as claimed in claim 4; It is characterized in that among the said step c, take out the frame processing and be specially: the code check detection system detects the code check of film source; Whether the code check of judging film source exceeds standard; Through taking out frame processing unit it is taken out frame for the high definition film source, reduce code check, be stored in network memory as the clear film source of low vertical frame dimension.
6. the method for low bandwidth transmission of digital high-definition signal as claimed in claim 5 is characterized in that, the said frame processing unit of taking out is taken out the frame processing to the high definition film source, reduces code check to 4Mbps.
7. the method for low bandwidth transmission of digital high-definition signal as claimed in claim 5 is characterized in that, the said frame processing unit of taking out is taken out the frame processing to the high definition film source, takes out in the process of frame compression, reduces the quantity of P frame and B frame, and the quantity of I frame is constant.
8. like the method for claim 4 or 5 described low bandwidth transmission of digital high-definition signals; It is characterized in that; Said step c also comprises: when terminal reception process is taken out the high definition film source of frame processing; To received signal decoding, and, between primitive frame, insert transition frames through frame-rate conversion up conversion based on estimation and compensation.
9. a network multimedia TV comprises decoder module and display module, and said decoder module is decoded for the information source that comes from network that receives, and said display module is used for becoming image to show conversion of signals, it is characterized in that, also comprises:
Image zoom and frame replication module: be used for decoded signal is carried out image zoom and low replication processes;
Estimation and compensating module: be used for signal is detected, reject duplicated frame wherein, extract the primitive frame signal; Through estimation and compensation; In the middle of primitive frame, insert transition frames, and signal is carried out up-conversion process, input to display module and show.
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| CN113905200A (en) * | 2021-10-08 | 2022-01-07 | 山东亚华电子股份有限公司 | Video processing method and device based on statistics |
| CN113905200B (en) * | 2021-10-08 | 2023-07-11 | 山东亚华电子股份有限公司 | Video processing method and device based on statistics |
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Application publication date: 20120208 |