CN100588249C - Method, system and terminal for adjusting video quality - Google Patents

Method, system and terminal for adjusting video quality Download PDF

Info

Publication number
CN100588249C
CN100588249C CN 200610103597 CN200610103597A CN100588249C CN 100588249 C CN100588249 C CN 100588249C CN 200610103597 CN200610103597 CN 200610103597 CN 200610103597 A CN200610103597 A CN 200610103597A CN 100588249 C CN100588249 C CN 100588249C
Authority
CN
Grant status
Grant
Patent type
Prior art keywords
terminal
video
level
coding
table
Prior art date
Application number
CN 200610103597
Other languages
Chinese (zh)
Other versions
CN101115196A (en )
Inventor
俊 刘
盛馥钟
Original Assignee
腾讯科技(深圳)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/80QoS aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26208Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
    • H04N21/26216Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/442Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44209Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/442Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/4425Monitoring of client processing errors or hardware failure
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4621Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/60Selective content distribution, e.g. interactive television, VOD [Video On Demand] using Network structure or processes specifically adapted for video distribution between server and client or between remote clients; Control signaling specific to video distribution between clients, server and network components, e.g. to video encoder or decoder; 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
    • H04N21/63Control 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
    • H04N21/637Control signals issued by the client directed to the server or network components
    • H04N21/6373Control signals issued by the client directed to the server or network components for rate control, e.g. request to the server to modify its transmission rate
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/60Selective content distribution, e.g. interactive television, VOD [Video On Demand] using Network structure or processes specifically adapted for video distribution between server and client or between remote clients; Control signaling specific to video distribution between clients, server and network components, e.g. to video encoder or decoder; 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
    • H04N21/63Control 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
    • H04N21/637Control signals issued by the client directed to the server or network components
    • H04N21/6377Control signals issued by the client directed to the server or network components directed to server
    • H04N21/6379Control signals issued by the client directed to the server or network components directed to server directed to encoder, e.g. for requesting a lower encoding rate
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/60Selective content distribution, e.g. interactive television, VOD [Video On Demand] using Network structure or processes specifically adapted for video distribution between server and client or between remote clients; Control signaling specific to video distribution between clients, server and network components, e.g. to video encoder or decoder; 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
    • H04N21/63Control 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
    • H04N21/643Control 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 using dedicated Communication protocols
    • H04N21/6437Real-time Transport Protocol [RTP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/60Media handling, encoding, streaming or conversion
    • H04L65/608Streaming protocols, e.g. RTP or RTCP

Abstract

The invention discloses a method, a system and a terminal of a video quality adjustment, which solves the problem that a video transmission quality is influenced when an estimation of a network bandwidth is not exact because in the prior art a current network bandwidth needs to be estimated. The method of the invention comprises that: a default grade items are retrieved from a presupposed coding grade table and based on a parameter of the default grade items, a video connection is built. In addition, a real-time time transport control protocol RTCP is received and sent for the purpose of judging web state and according to the judging result, the current coding grade items is correspondingly adjusted. The network transmission resources terminal of the invention comprises an encoding unit, aRTCP transmission unit and a memory cell of the coding grade table for presupposing and coding grade table, a grade table items retrieval unit which is used for retrieving the corresponding grade items from the coding grade table stored in the memory cell of the coding grade table according to the received judging result of the web state and the retrieved parameter of the grade items is output tothe encoding unit. The invention can avoid the estimation of the current network bandwidth.

Description

调节视频质量的方法、系统及终端 The method of adjusting the video quality, system and terminal

技术领域 FIELD

本发明涉及视频通信领域,特别是涉及调节视频质量的方法、系统及终端。 The present invention relates to the field of video communications, particularly to a method of adjusting the video quality, system and terminal. 背景技术 Background technique

随着互联网的迅猛发展以及多媒体技术的日益成熟,视频通信的市场应用越来越广泛,实现视频通信的方式也变得多种多样,如可视电话、即时通信、 With the rapid development of the Internet and become more sophisticated multimedia technology, video communications market applications more widely, the way to achieve video communication becomes diverse, such as video telephony, instant messaging,

视频聊天、IPTV、远程监控,以及远程医疗等。 Video chat, IPTV, remote monitoring, and telemedicine. 视频通信发展的广阔前景使其成为继话音通信之后又一重要的通信形式。 Broad prospects for the development of video communication after making voice communication is another important form of communication.

视频通信一般是在专用的或公用通信网络上,点对点或点对多点来传送视频数据,从用户期望更广泛的交流和更低的成本的角度来看,公用网络将是用户的首选。 Video communication is typically on a dedicated or public communication networks, or point-to-point transmission of video data from the user desires a wider and lower communication cost point of view, the public network is the user's choice. 而同时由于视频通信对实时性和交互性的要求,承载视频通信的网络必须能够保证^见频的流畅性和质量。 Since the video communication while the real-time requirements and interactive, video communication bearer network must be able to ensure the quality and smooth ^ See frequency. 近几年来,通信网络的IP化成为网络发展的主流,基于IP网络的视频通信得到普遍应用和广泛发展。 In recent years, IP based communication networks become the mainstream of network development, IP-based video communications network and a wide range of universal application development. IP网络是使用TCP/IP协议的面向无连接的网络,H,323标准是ITU-T在1996年制定的应用于IP网络的视频通信标准,它是目前拥有大量商业用户的视频通信标准, 得到了普遍的认可和广泛的应用。 IP network using network-oriented TCP / IP protocol is connectionless, H, 323 standard is the standard used in IP video communications network developed by the ITU-T in 1996, it now has a large number of commercial users of video communications standard, get generally recognized and widely used.

承载视频通信的IP网络首先要面对的是带宽问题,以视频聊天为例,才艮据经验数值,使用流行的H,263编码标准,要保证可接受的质量和流畅度,需要网络带宽为128~256kbit/s。 Video communication bearer IP network to face the first problem is the bandwidth, a video chat, for example, according to empirical values ​​Gen only, using the popular H, 263 coding standard, to ensure the fluency and acceptable quality, the network bandwidth is required 128 ~ 256kbit / s. 由于是交互式通信,加上网络传送的负荷,一个实际的点对点的^L频通话,可能要占据此带宽的2.5倍(320~640kbit/s)。 Because it is the interactive communication, with network transmission load, a point of the actual video call ^ L, 2.5 times as likely to occupy this bandwidth (320 ~ 640kbit / s). 因此,视频通信需要消耗大量的网络带宽,要在各种网络下(如互联网、局域网)保障质量参数QoS,就需要通过视频质量调节来进行带宽控制。 Accordingly, the video communication consumes a lot of network bandwidth to be (such as the Internet, a local area network) to protect the quality QoS parameters in various networks need to be adjusted by the bandwidth control video quality.

其次,视频通信对时延和抖动很敏感,因此视频传输一般都采用实时性高的用户数据包协议UDP协议。 Secondly, video communication is sensitive to delay and jitter, thus real-time video transmission are generally highly User Datagram Protocol UDP protocol. 但由于UDP协议没有任何拥塞控制算法,因此容易造成网络过栽和高丢包率,从而影响视频的传输质量。 But because the UDP protocol has no congestion control algorithms, the network can easily lead to over-planted and high packet loss rate, thus affecting the transmission quality of the video. 因此视频通信还需要RTP/RTCP协议的支持,RTP与RTCP结合可以为网络提供流量控制和拥塞控制。 Thus a video communication needs RTP / support, RTP and RTCP RTCP protocol may be provided in conjunction with flow control and network congestion control. 在RTP会话期间,各参与者周期性地传送RTCP包。 During RTP session, each participant periodically transmit RTCP packets. RTCP包中含有已发送的数据包的数量、丟失的数据包的数量等统计资料,这些信息是判断网络状况以进行动态视频质量调节的主,据。 RTCP packet comprising the number of packets sent, the number of lost packets statistics, network status information is determined for the primary motion video quality adjustment, according to.

目前视频传输的质量控制一般有以下几种方案: At present the quality control of video transmission generally have the following options:

1、 最小传输的视频编码。 1, the minimum transmission of video encoding. 即按照最低可接受的带宽由编码器产生视频码流进行传输。 I.e. the code generated by the video encoder according to the minimum acceptable bandwidth stream for transmission.

2、 转码技术。 2, transcoding. 即在服务器中保存一份质量足够好的压缩视频数据,当需要降低输出码率时,服务器只需进行部分的解码和编码就可以输出合适的视频数据流。 I.e., stored in the server of a sufficiently good quality of the compressed video data, when it is necessary to reduce the output rate, the server simply decoding and encoding portions can output appropriate video data stream.

3、 码流切换技术。 3, stream switching technology. 服务器中保存同一个视频节目的不同质量的多个拷贝, 这些码流的I帧是对齐的,服务器根据用户网络带宽情况选择一个适当的码流发送给用户。 Stored in a server with multiple copies of a video program of a different quality, the I-frame of these streams are aligned, the server selects a code stream to the appropriate users based on network bandwidth.

4、 自适应^L频编码。 4, the adaptive frequency encoding ^ L. 即才艮据网络环境的变化来自动调整编码器的参数, 使得输出码流的码率适应网络变化的编码方法。 I.e., only changes in the network environment, according to Gen to automatically adjust the parameters of the encoder, such that the output stream rate adaptation changes in the network coding method. 一般的做法是发送方将压缩数据流划分成RTP协议包发送给接收方,接收方监测RTP数据包的传输时延和丟包率,通过RTP协议中的RTCP协议将网络传输情况反馈给发送方,发送方根据网络带宽情况调整数据发送码率使之与网络环境相匹配。 The general practice is the sender of the compressed data stream into the transmission delay and packet loss rate RTP protocol packets sent to the receiver, the receiver monitoring RTP packet, the RTP protocol through the network transmission protocol RTCP feedback to the sender the sender adjusts the data transmission rate according to the network bandwidth so as to match the network environment.

现有技术1所述的最小传输的视频编码方案,其主要缺点是视频传输缺少适应网络动态变化的灵活性; Video coding scheme according to a minimum transmission of the prior art, its main drawback is the lack of flexibility to adapt to video transmission network changes;

现有才支术2和3所述的转码技术和码流切换技术,其为了增加灵活性而大大提高了服务器的存储成本; The prior art before performing transcoding and 23 and the stream switching technology, in order to increase its flexibility greatly increases the cost of the storage server;

现有技术4所述的自适应视频编码方案是较为灵活的一种方案,但其需要估计当前的网络带宽值,并据此调整数据发送码率,当估计不准时视频传输的质量将受到影响。 Adaptive prior art video coding scheme 4 is a more flexible solution, but it is necessary to estimate the value of the current network bandwidth, and to adjust the data transmission rate, when the estimated quality of the video transmission allowed time will be affected . 发明内容本发明提供调节视频质量的方法、系统及终端,用以解决现有技术需要估计当前的网络带宽值,当估计不准时视频传输质量将受到影响的问题。 The present invention provides a method, system and terminal adjusting video quality to estimate the current need to solve the prior art value of network bandwidth, are not allowed to issue when the estimated quality of video transmission will be affected. 本发明方法包括下列步骤:数建立视频连接;以及发送方终端以自适应的时间间隔发送实时传输控制协议RTCP包,接收方终端根据接收到的RTCP包中的信息判断网络状况,发送方终端根据从接收方终端收到的网络状况判断结果相应调整当前编码级别表项,其中,所述自适应的时间间隔=(-观频已建立的时间)x (EXP (I帧间隔时间/125) -1)。 The method of the present invention comprises the steps of: establishing a video connection number; and a sender terminal transmits an adaptive real-time transmission interval control protocol RTCP packet, the receiver terminal determines the network condition based on information received RTCP packet, the sending terminal according to the Analyzing the recipient terminal from the received result of the current network conditions to adjust the coding level corresponding entries, wherein the adaptive time interval = (- time concept established frequency) x (EXP (I-frame interval / 125) - 1). 其中,所述编码级别表中的每一级别表项包括下列参数:关键帧I帧间隔、 质量优先或速度优先、质量优先情况下的带宽、质量优先情况下的帧率、速度优先情况下的带宽、速度优先情况下的帧率、视频窗口横向缩放比例,以及视频窗口纵向缩;故比例。 Wherein each of said coding level entry level of the table includes the following parameters: Key frame I frame interval, quality-priority or speed priority, the bandwidth at the frame rate, the quality of the quality of the priority of priority, the speed priority conditions the bandwidth, the frame rate in the speed priority, the lateral scale video window, the video window and the longitudinal shrinking; it ratio. 综上所述,以收发双方的终端能力中较低的终端能力确定最高视频帧率, 并以该最高视频帧率为限,相应确定编码级别表中可用的级别表项。 In summary, both the terminal capabilities to lower terminal capability transceiver determines the highest video frame rate, video frame rate and to the maximum limit of the respective table entries to determine the level of available coding level table. 所述终端能力包括:该终端的CPU,该终端的一级高速緩冲存储器Cache的大小,以及该终端的二级Cache的大小。 The terminal capability include: CPU of the terminal, a cache memory Cache size of the terminal, and the size of two of the terminal Cache. 本发明的发送方终端,包括:编码单元,用于根据输入的参数,将视频流编码,并向接收方终端发送;RTCP包发送单元,用于向接收方终端发送RTCP包; 编码级別表存储单元,用于预设编码级别表;级别表项提取单元,用于根据从接收方终端收到的网络状况判断结果,从所述编码级别表存储单元存储的编码级别表中提取相应的级别表项,并将提取的级别表项中的参数输出到编码单元;自适应单元,用于以自适应的时间间隔控制所述RTCP包发送单元发送RTCP包,所述自适应的时间间隔=(视频已建立的时间)x (EXP(I帧间隔时间/125) -1 )。 Sender terminal according to the present invention, comprises: an encoding unit for input parameters, encoding a video stream, and transmits the receiving terminal; RTCP packet transmitting means for transmitting the RTCP packet to the receiving terminal; and coding level table stored in means for presetting and coding level table; entry level extraction unit configured to determine according to the received network status from the result of the recipient terminal, extracts the corresponding level from the table level coding level table stored in the table storage unit item, and outputs the extracted parameters in the entry level coding unit; adaptation unit for adaptively controlling the time intervals RTCP packet RTCP packet transmission unit transmits the adaptive interval = (video established time) x (EXP (I-frame interval / 125) - 1). 进一步,所述终端还包括:第一终端能力获取单元,用于获取本端的终端能力;最高视频帧率确定单元,用于以本端的终端能力和接收方终端发来的终端能力中较低的终端能力确定最高视频帧率,并以该最高视频帧率与所述编码级别表存储单元交互,相应确定编码级别表中可用的级别表项。 Further, the terminal further comprises: a first terminal capability obtaining unit, configured to acquire terminal capability of the local end; maximum video frame rate determination unit for terminal capability of the local terminal to the recipient terminal capabilities and sent lower in the determine the maximum capacity of the terminal a video frame rate, video frame rate and the highest in the table storage means interact with the coding level, the corresponding table entry to determine the level of available coding level table. 本发明系统,包括:接收方终端,用于对接收到的视频码流解码,以及根据收到的RTCP包中的信息判断网络状况,并将判断结果反馈给发送方终端;发送方终端,用于发送编码后的视频码流及以自适应的时间间隔发送RTCP包,以及根据接收方终端反馈的网络状况判断结果,从预设的编码级别表中提取相应的级别表项,并以该级别表项中的参数进行编码,所述自适应的时间间隔=(-现频已建立的时间)x (EXP (I帧间隔时间/125) -1)。 The system of the present invention, comprising: a receiving terminal, for decoding the video code stream received, and determines the network condition based on information in the received RTCP packet, and send the judgment result to the sender terminal; sender terminal, with video stream encoded and transmitted to the adaptive RTCP packet transmission time intervals, and the judgment result of the recipient terminal according to a feedback network conditions, extracts a corresponding entry from the default level of coding level table, and in that level entry encoding parameters, the adaptive interval = (- time now established frequency) x (EXP (I-frame interval / 125) - 1). 本发明有益效果如下:本发明方法在发送方获知当前网络状况后,无须估计当前的网络带宽值,而是以预设的编码级别表结合当前网络状况相应调整所用的编码级别表项;即当前网络状况不好,则调低所用的编码级别表项;当前网络状况良好,则调高所用的编码级别表项。 Advantageous effects of the present invention is as follows: after the process of the present invention, the sender informed of the current network conditions, without the estimated current value of network bandwidth, but in conjunction with a predetermined coding level table entry adjusted and coding level used in the current network conditions; i.e., the current poor network conditions, entry-level coding used is down; the current network in good condition, entry-level coding is used to increase. 从而按照预设的编码级别表,总能使得视频质量与当前网络状况相适应,在网络状况良好时,提供高质量且流畅的视频,而在网络状况较差时,保障基本的视频体验,找到质量与流畅度之间的平衡。 Thus according to a preset level coding table can always make the video quality to adapt to the current network conditions, when the network is in good condition, providing high-quality and smooth video, and in poor network conditions, guarantee basic video experience, find balance between quality and fluency. 进一步,本发明方法还考虑了收发双方的终端能力对^L频质量和流畅度的影响。 Further, the present invention also contemplates a method of sending and receiving sides of the influence of the terminal capability ^ L video quality and fluency. 本发明方法以收发双方的终端能力中较低的终端能力确定最高视频帧率,并以该最高视频帧率为限,相应确定编码级别表中可用的级别表项。 The method of the present invention is the ability to send and receive both the lower end of the terminal capabilities to determine the maximum video frame rate, video frame rate and to the maximum limit of the respective table entries to determine the level of available coding level table. 进一步,本发明方法还考虑了4^RTCP包对网络负载的影响。 Further, the present invention also contemplates a method of 4 ^ RTCP packet influence of the network load. 本发明方法以自适应的时间间隔收发RTCP包。 The method of the present invention is an adaptive time interval transceiver RTCP packet. 为了支撑本发明方法,本发明还提供了发送方终端、接收方终端和相应的系统。 In order to support the method of the present invention, the present invention also provides a sender terminal, recipient terminal, and a corresponding system. 附图说明图1为本发明系统结构示意图; 图2为本发明发送方终端结构示意图; 图3为本发明接收方终端结构示意图; 图4为本发明方法步骤流程图。 BRIEF DESCRIPTION OF schematic diagram of a system configuration diagram of the invention; FIG sender schematic structure of a terminal 2 of the present invention; FIG schematic view of a terminal structure of the receiver 3 of the present invention; FIG. 4 is a flowchart of the method steps of the invention. 具体实施方式为了在进行视频质量调节时,无须估计当前的网络带宽值,从而避免当估计不准时,视频传输质量将受到影响的问题,本发明提供了一种调节视频质量的系统,参见图1所示,其包括:发送方终端1和接收方终端2。 DETAILED DESCRIPTION In order to adjust video quality when performing, without the estimated value of the current network bandwidth, so as to avoid problems when allowed, the video transmission quality estimates will be affected, the present invention provides a system for video quality adjustment, see Fig 1 shown, comprising: a sender terminal and a receiver terminal 2. 所述发送方终端1,用于发送编码后的视频码流及RTCP包,以及根据接收方终端2反馈的网络状况判断结果,从预设的编码级别表中提取相应的级别表项,并以该级别表项中的参数进行编码。 The sender terminal 1, for transmitting encoded video stream and the RTCP packet, and the second feedback is determined in accordance with network conditions result receiving terminal, extracts a corresponding entry from a preset level and coding level table and to the entry-level encoding parameters. 所述接收方终端2,用于对接收到的视频码流解码,以及根据收到的RTCP 包中的信息判断网络状况,并将判断结果反馈给发送方终端1。 The receiving terminal 2, for decoding the video stream received, and determines the network condition based on information in the received RTCP packet, and the determination result is fed back to the sender terminal 1. 参见图2所示,上迷系统中的发送方终端l (即本发明的发送方终端)中包括:RTCP包发送单元11、级别表项提取单元12,以及与级别表项提取单元12相连的编码级别表存储单元13和编码单元14;进一步,为了顾及收发双方的终端能力对视频质量和流畅度的影响,所述发送方终端还包括相互连接的第一终端能力获取单元15和最高视频帧率确定单元16,所述最高视频帧率确定单元16还与编码级别表存储单元13相连;进一步,为了减少收发RTCP包对网络负载的影响,所述发送方终端还包括与所述RTCP包发送单元11相连的自适应单元17。 Referring to FIG. 2, the fan system sender terminal L (i.e. the sending terminal according to the present invention) include: RTCP packet transmission unit 11, is connected to the entry level extraction unit 12, and extracts the entry-level unit 12 and coding level table storage unit 13 and the encoding unit 14; further, in order to take into account the ability to send and receive both the terminal on the video quality and affect fluency of the sending terminal further comprises a first terminal connected to each other capability acquiring unit 15 and the maximum video frame rate determination unit 16, the maximum video frame rate determination unit 16 is further connected to the coding level table storage unit 13; further, in order to reduce the influence of the transceiver RTCP packet network load, the sender terminal further comprising sending the RTCP packet adaptation unit connected to the unit 1117. 所述编码级别表存储单元13,用于预设编码级别表。 The coding level table storage unit 13 for a preset coding level table. 所述第一终端能力获取单元15,用于获取本端的终端能力。 Said first terminal capability obtaining unit 15, configured to acquire the local terminal capability. 所述最高浮见频帧率确定单元16,用于以本端的终端能力和接收方终端发来的终端能力中较低的终端能力确定最高视频帧率,并以该高视频帧率与所述编码级别表存储单元13交互,相应确定编码级别表中可用的级别表项。 The highest frequency of the frame rate determination unit See float 16, a terminal capability of the local terminal to the recipient terminal capabilities and sent lower terminal capability determine the maximum video frame rate, video frame rate and in that the high and coding level table storage unit 13 interacts, determine the level of the corresponding coding level table entry is available. 所述级别表项提取单元12,用于根据收到的网络状况判断结果,从所述编码级别表存储单元13存储的编码级别表中提糾目应的级别表项,并将提取的级别表项中的参数输出到编码单元14。 The entry level extraction unit 12, configured to determine network conditions according to the received results, entry should provide correct level from the encoded table storage unit 13 and coding level table stored in the entry level, and the level of the extracted table parameter output to the encoding unit 14 is. 所述编码单元14,用于根据输入的参数,将浮见频流编码,并向接收方终端2发送。 The encoding unit 14, according to the input parameters, see the floating video stream encoding, transmitting and receiving terminal 2. 所述RTCP包发送单元11 ,用于向接收方终端2发送RTCP包。 The RTCP packet sending unit 11 for sending RTCP packet 2 to the receiver terminal. 所述自适应单元17,用于以自适应的时间间隔控制所述RTCP包发送单元ll发送RTCP包。 The adaptation unit 17, an adaptive time interval for the RTCP packet transmission control unit ll send RTCP packets. 参见图3所示,上述系统中的接收方终端2 (即本发明的接收方终端)中包括:解码单元21和RTCP包接收单元22;为了顾及收发双方的终端能力对视频质量和流畅度的影响,所述接收方终端还包括第二终端能力获取单元23。 Referring to FIG. 3, the receiver terminal 2 in the system described above (i.e., the recipient terminal according to the present invention) include: a decoding unit 21 and the RTCP packet receiving unit 22; having regard to the ability to send and receive both a terminal on the video quality and fluency Effect, the receiving terminal further includes a second capability obtaining unit 23 terminal. 所述解码单元21,用于将收到的视频码流解码。 The decoding unit 21 for decoding a video stream to be received. 所述RTCP包接收单元22,用于接收RTCP包,并根据RTCP包中的信息判断网络状况,以及将判断结果反馈给发送方终端1。 The RTCP packet receiving unit 22, for receiving the RTCP packet, and determines the network condition based on the information in the RTCP packet, and the determination result to the sender terminal 1. 所述第二终端能力获取单元23,用于获取本端的终端能力,并向发送方终端l发送。 Said second terminal capability obtaining unit 23, configured to acquire the local terminal capability, and transmits the sender terminal l. 应用上述系统及终端,本发明提供了一种调节视频质量的方法,参见图4 所示,包括下列主要步骤:Sl、从预设的编码级别表中提取默认级别表项。 Application of the above-described system and terminal, the present invention provides a method of adjusting video quality, refer to FIG. 4, includes the following main steps: Sl, extracted from a predetermined default level entry level coding table. 首先,在发送方终端中预设编码级别表。 First, a preset coding level table sender terminal. 所迷编码级别表中包括若干级别表项,以适应不同的网络状况。 The fans coding level table entry comprises several levels, to adapt to different network conditions. 所述级别表项越高,其中的各参数数值适用的网络状况越好;相反,所述级别表项越低, 其中的各参数数值适应的网络状况越差。 The higher the level entry, wherein each of better parameter values ​​applicable network conditions; Conversely, the lower the entry level, network status wherein the numerical values ​​of the parameter adaptation worse. 参见表一所示,所述编码级别表中的每一级别表项均包括下列参数:关键帧I帧间隔、质量优先或速度优先、质量优先情况下的带宽、质量优先情况下的帧率、速度优先情况下的带宽,以及速度优先情况下的帧率;此外,为了增加码率控制的灵活性,每一级别表项中还包括:视频窗口横向缩放比例,以及视频窗口纵向缩放比例。 Table I shows, for each of the entry level coding level table comprises the following parameters: Key frame I frame interval, quality-priority or speed priority, the bandwidth, the frame rate in the case where the quality of the quality of the priority cases priority, bandwidth, and the frame rate in the case where the speed priority speed priority case; Furthermore, in order to increase the flexibility of rate control, each class entry further comprises: a lateral scale video window, the video window as well as a longitudinal scale. 例如:第9级表项={100, 0,300, 12,200, 13,4/5, 1}表示在第9级上,编码器将每隔100帧插入一个I帧,选择速度优先方式,质量优先情况下的带宽和帧率分别为300k和12帧,速度优先方式下的带宽和帧率分别为200k和13帧,视频窗口横向缩放比例为4/5,视频窗口纵向缩放比例为1。 For example: The first nine entries = {100, 0,300, 12,200, 13, 4/5, 1} indicates the level 9, the encoder 100 is inserted into every one I frame, selecting speed priority mode, the quality of priority where bandwidth and the frame rate at 300k and 12, respectively, at the frame rate bandwidth and speed priority mode and 200k, respectively 13, video window lateral scale of 4/5, video window is a longitudinal scale. <table>table see original document page 10</column></row> <table><table>table see original document page 11</column></row> <table>表一 <Table> table see original document page 10 </ column> </ row> <table> <table> table see original document page 11 </ column> </ row> <table> Table

其次,可选^^检测收发双方的终端能力。 Next, an optional terminal capability of sending and receiving sides ^^ detected.

R264标准与传统的编码标准相比,编码效率能够提高50%左右,但其对终端能力的要求也将成倍地增加。 R264 compared with the conventional standard coding standards, the coding efficiency can be improved about 50%, but the required capacity of the terminal will also be multiplied. 如果接收方终端的解码能力不足,就必须控制发送方终端的编码帧率,以免接收方终端来不及解码而丟帧,造成视频的不流畅。 If a low decoding capability recipient terminal, it is necessary to control the frame rate of the encoding of the sender terminal, recipient terminal in order to avoid decoding the frame dropping too late, resulting in not smooth video.

因此,为了顾及收发双方的终端能力,以达到更好的视频效果,在建立视频连接之前,可选择检测收发双方的终端能力。 Accordingly, in order to take into account the ability to send and receive sides of the terminal, in order to achieve better video effects, video prior to establishing the connection, select the detection capability of both transmitting and receiving terminals. 以收发双方的终端能力中较低的终端能力确定最高视频帧率,并以该最高视频帧率为限,相应确定编码级别表中可用的级别表项。 The ability to send and receive both the lower end of the terminal capabilities to determine the maximum video frame rate, video frame rate and to the maximum limit of the respective table entries to determine the level of available coding level table.

在视频流编解码过程中,终端能力主要体现在CPU的处理能力。 In the process of encoding and decoding the video stream, the terminal is mainly reflected in the processing capability of the CPU. CPU的处理能力主要由CPU主频决定,但除主频之外,其他因素(如Cache大小) 也对CPU的处理能力有一定影响。 CPU processing power is mainly determined by the CPU clock speed, but in addition to frequency, other factors (such as Cache size) also have an impact on the processing power of the CPU. 因此根据CPU主频初步对应出最高视频帧率,例如:2700MHZ主频对应15帧,400MHZ主频对应1帧。 Thus, according to the preliminary CPU frequency corresponding to the maximum video frame rate, for example: 2700MHZ frequency corresponding to 15, corresponding to a frequency of 400MHZ. 进一步,再综合考虑CPU类型和一二级Cache大小等特性,以修正初步对应出的最高视频帧率,例如:对于AMD芯片,2级Cache大小超过128则帧率加1,超过256 则帧率加2。 Further, considering the type of CPU and then twelve Cache size and other characteristics, to correct the initial video frame rate corresponding to the highest, for example: for the AMD chips, the size of the Cache level 2 over 128 plus 1 frame rate, the frame rate of more than 256 plus 2.

最后,以所述最高视频帧率为限,从预设的编码级别表中提取默认级别表项,所述默认级别表项应选择较低的级别表项,以保证顺利建立视频连接。 Finally, in order to limit the maximum video frame rate is extracted from the default level entry level pre-coding table, the default level entries should choose a lower level entry, in order to ensure the smooth establish a video connection. 52、 以默认级别表项中的参数建立视频连接。 52, with default parameters entry level to establish a video connection.

53、 发送RTCP包。 53, transmitted RTCP packet.

建立视频连接后,发送方终端向接收方终端发送RTCP包。 After establishing a video connection, the sender terminal transmits the RTCP packet to the receiver terminal. 所述发送的RTCP包中含有丢包率、网络抖动和延迟时间等信息。 Transmitting the RTCP packet contains packet loss ratio, network jitter and delay time information.

本步骤可采用每隔一定的时长发送一个RTCP包的方式。 This step can be transmitted at intervals of a certain duration RTCP packet manner. 但是当^L频连接刚建立时,发包的时间间隔较短为宜,以快速判断网络状况;而在视频连接稳定之后,发包的时间间隔应逐渐加长,以减少RTCP包带来的网络负载。 However, when the newly established connection ^ L frequency, contract shorter interval appropriate to quickly determine the status of the network; and after the video connection stable, contracting the time interval should be gradually lengthened to reduce the network load caused by RTCP packets. 所以本发明优选以自适应的时间间隔收发RTCP包。 The present invention is preferably an adaptive transceiver RTCP packet intervals. 所述自适应的时间间隔通过以下公式计算:发送RTCP包的时间间隔=(视频已建立的时间)x (EXP (I帧间隔时间/125)-1)。 The adaptive time interval calculated by the formula: sending RTCP packet interval = (time of the video established) x (EXP (I-frame interval / 125) - 1).

54、 接收RTCP包,以判断网络状况。 54, the received RTCP packet, to determine the network status.

接收方终端收到发送方终端发来的RTCP包后,解包获糾目关信息,若收到的RTCP包中含有的丟包率、网络抖动和延迟时间同时小于相应的阀值时, 判定网络状况良好;否则,判定网络状况不好。 When the receiver terminal receives the sent sender terminal RTCP packet, the packet is eligible for correction purposes solutions related information, if the RTCP packet loss rate contained in the received, network jitter and the delay time at the same time less than the corresponding threshold value, it is determined network in good condition; otherwise, the judgment is not good network conditions.

55、 根据判断结果相应调整当前编码级别表项。 55, to adjust the current encoding level corresponding entry according to the determination result.

接收方终端将网络状况判断结果反馈给发送方终端。 The recipient terminal network status determination result to the sender terminal. 若发送方终端收到的判断结果表明当前网络状况良好,还有提升视频质量和流畅度的余地,则调高当前所用的编码级别表项,从而编码生成质量更高的视频码流,向接收方终端发送;若发送方终端收到的判断结果表明当前网络状况不好,即当前所用的编码级别表项已经超过了当前网络状况的适应能力,则调低当前所用的编码级别表项,从而编码生成质量较低的视频码流,向接收方终端发送。 If the sender terminal receives the determination result indicates that the current network is good, there is room to improve the video quality and fluency, increase the entry level coding currently used to generate higher quality video encoding stream to the receiving transmitting party terminal; if the sender terminal receives the determination result indicates that the current network is not good condition, i.e., the current entry and coding level used has exceeded the ability to adapt to the current network conditions, the lower level of the current coding table entry used to code generation lower quality video stream is transmitted to the receiver terminal.

显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。 Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims (7)

  1. 1、一种调节视频质量的方法,其特征在于,包括下列步骤: 发送方终端从预设的编码级别表中提取默认级别表项,并以该表项中的参数建立视频连接;以及发送方终端以自适应的时间间隔发送实时传输控制协议RTCP包,接收方终端根据接收到的RTCP包中的信息判断网络状况,发送方终端根据从接收方终端收到的网络状况判断结果相应调整当前编码级别表项,其中,所述自适应的时间间隔=(视频已建立的时间)×(EXP(I帧间隔时间/125)-1)。 1. A method for adjusting video quality, characterized by comprising the steps of: extracting from the sender terminal a preset default level coding level table entry, and to establish a video connection to the entry parameters; and sender the terminal transmits an adaptive real-time transmission interval control protocol RTCP packet, the receiver terminal determines the network condition based on information received RTCP packet, the sending terminal according to the received network state from the receiving terminal is determined to adjust a current corresponding encoding result level entry, wherein the adaptive time interval = (time of the video established) × (EXP (I-frame interval / 125) - 1).
  2. 2、 如权利要求1所述调节视频质量的方法,其特征在于,所述编码级别表中的每一级别表项包括下列参数:关^t建帧I帧间隔、质量优先或速度优先、质量优先情况下的带宽、质量优先情况下的帧率、速度优先情况下的带宽、速度优先情况下的帧率、视频窗口横向缩;故比例,以及一见频窗口纵向缩放比例。 2, the video quality adjusting method as claimed in claim 1 said wherein said coding level table entries in each level comprises the following parameters: Off built ^ t I frame interval, quality-priority or speed priority, quality the bandwidth, the frame rate in the case where the quality of priority, the bandwidth at the frame rate, the speed of the speed priority case where the priority of the priority, the lateral compression video window; it ratio, and a frequency window to see the longitudinal scale.
  3. 3、 如权利要求1至2任一项所述调节视频质量的方法,其特征在于,以收发双方的终端能力中较低的终端能力确定最高视频帧率,并以该最高视频帧率为限,相应确定编码级别表中可用的级别表项。 3, a method as claimed in any one of the adjusting video quality in claim 1 or 2, wherein the terminal capability to both send and receive the lower terminal capability determining the maximum video frame rate, video frame rate and is limited to the maximum , determine the level of the corresponding coding level table entry is available.
  4. 4、 如权利要求3所述调节视频质量的方法,其特征在于,所述终端能力包括:该终端的CPU主频,该终端的一级高速緩冲存储器Cache的大小,以及该终端的二级Cache的大小。 4, the video quality adjusting method as claimed in claim 3, wherein said terminal capabilities include: two CPU clock speed of the terminal, a cache memory Cache size of the terminal, and the terminal Cache size.
  5. 5、 一种发送方终端,包括:编码单元,用于根据输入的参数,将视频流编码,并向接收方终端发送; RTCP包发送单元,用于向接收方终端发送RTCP包; 其特征在于,所述发送方终端还包括: 编码级别表存储单元,用于预设编码级别表;级别表项提取单元,用于根据从接收方终端收到的网络状况判断结果,从的级别表项中的参数输出到编码单元;自适应单元,用于以自适应的时间间隔控制所述RTCP包发送单元发送RTCP包,所述自适应的时间间隔=H见频已建立的时间)x (EXP(I帧间隔时间/125) -1 )。 5. A sender terminal, comprising: an encoding unit for input parameters, encoding a video stream, and transmits the receiving terminal; RTCP packet transmitting means for transmitting the RTCP packet to the receiver terminal; wherein the sender terminal further comprising: a coding level table storage means for presetting and coding level table; entry level extraction unit, according to the judgment result received from the receiving terminal network status, from the entry level the output parameters to the coding section; adaptation unit for adaptively controlling the time intervals RTCP packet RTCP packet transmission unit transmits the adaptive time interval = H see established frequency) x (EXP ( I-frame interval / 125) - 1).
  6. 6、 如权利要求5所述的发送方终端,其特征在于,所述终端还包括: 第一终端能力获取单元,用于获取本端的终端能力;最高视频帧率确定单元,用于以本端的终端能力和接收方终端发来的终端能力中较低的终端能力确定最高视频帧率,并以该最高视频帧率与所述编码级别表存储单元交互,相应确定编码级别表中可用的级别表项。 6, the sending terminal as claimed in claim 5, characterized in that the terminal further comprises: a first terminal capability obtaining unit, configured to acquire terminal capability of the local end; maximum video frame rate determination unit for this end determine the maximum capacity of the terminal lower frame rate video terminal capabilities and terminal capabilities sent by the receiving terminal, the video frame rate and the highest in the table storage means interact with the coding level, the respective coding level table to determine the level of available tables item.
  7. 7、 一种调节视频质量的系统,包括:接收方终端,用于对接收到的4见频码流解码,以及根据收到的RTCP包中的信息判断网络状况,并将判断结果反馈给发送方终端; 其特征在于,所述系统还包括:发送方终端,用于发送编码后的一见频码流及以自适应的时间间隔发送RTCP包,以及根据接收方终端反馈的网络状况判断结果,从预设的编码级别表中提取相应的级别表项,并以该级别表项中的参数进行编码,所述自适应的时间间隔=(一见频已建立的时间)x (EXP (I帧间隔时间/125) -1)。 7. A video quality adjusting system, comprising: a receiver terminal for the received pilot stream decoding see 4, and determines the network condition information received RTCP packet according to the determination result back to the transmitting party terminal; wherein, said system further comprising: a sender terminal, a see-frequency code for transmitting the encoded stream adaptively and RTCP packet transmission time intervals, and the judgment result of the recipient terminal according to a feedback network state , a preset coding level is extracted from the table entry corresponding to the level, and is encoded in the entry level parameters, the adaptive interval = (see a time established frequency) x (EXP (I frame interval time / 125) - 1).
CN 200610103597 2006-07-27 2006-07-27 Method, system and terminal for adjusting video quality CN100588249C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610103597 CN100588249C (en) 2006-07-27 2006-07-27 Method, system and terminal for adjusting video quality

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200610103597 CN100588249C (en) 2006-07-27 2006-07-27 Method, system and terminal for adjusting video quality
PCT/CN2007/070335 WO2008014707A1 (en) 2006-07-27 2007-07-20 Method, system and terminal of adjusting video quality

Publications (2)

Publication Number Publication Date
CN101115196A true CN101115196A (en) 2008-01-30
CN100588249C true CN100588249C (en) 2010-02-03

Family

ID=38996880

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610103597 CN100588249C (en) 2006-07-27 2006-07-27 Method, system and terminal for adjusting video quality

Country Status (2)

Country Link
CN (1) CN100588249C (en)
WO (1) WO2008014707A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104349158A (en) * 2013-07-26 2015-02-11 腾讯科技(深圳)有限公司 Communication video quality adjusting method and relevant equipment and system

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101242359B (en) * 2008-02-27 2010-08-18 Huawei Tech Co Ltd Dynamic code rate allocation method and packet domain stream media server
US8607283B2 (en) 2009-04-24 2013-12-10 Delta Vidyo, Inc. Systems, methods and computer readable media for instant multi-channel video content browsing in digital video distribution systems
CN101621681B (en) 2009-07-30 2012-08-29 腾讯科技(深圳)有限公司 Method and equipment for adjusting video communication quality
CN101990087A (en) * 2010-09-28 2011-03-23 深圳中兴力维技术有限公司 Wireless video monitoring system and method for dynamically regulating code stream according to network state
CN102547206B (en) * 2010-12-30 2014-03-26 中国移动通信集团公司 Method and device for determining video transmission parameter during video communication
CN102098547A (en) * 2011-01-24 2011-06-15 深圳市威康普科技有限公司 Transmission method of self-adaptive/real-time high-definition video for embedded network
CN102413307B (en) * 2011-11-30 2013-11-27 晶门科技(深圳)有限公司 Self-adaptive code rate adjustment method and device for television video chat
CN102638705A (en) * 2011-12-09 2012-08-15 中兴通讯股份有限公司 Transcode parameter templating method and transcoding system of CMS (content management system)
CN103179438B (en) * 2011-12-20 2015-12-16 中国移动通信集团上海有限公司 Video playback apparatus and method for determining the first access code rate
CN102523486A (en) * 2011-12-31 2012-06-27 北京佳讯飞鸿电气股份有限公司 Method for realizing self adaptation to dynamic code stream bandwidth in video scheduling system
CN102821311B (en) * 2012-05-30 2015-07-15 浙江宇视科技有限公司 Video data packet priority setting method and device
CN103581767A (en) * 2012-07-24 2014-02-12 鸿富锦精密工业(深圳)有限公司 Regulating system, terminal and method for video quality
US10051519B2 (en) * 2012-08-27 2018-08-14 Qualcomm Incorporated Device and method for adaptive rate multimedia communications on a wireless network
CN104125429B (en) * 2013-04-27 2018-07-06 杭州海康威视数字技术股份有限公司 Adjusting method and apparatus for video data transmission
CN103533356A (en) * 2013-10-10 2014-01-22 深圳市智美达科技有限公司 Video data transmission method and device
CN103501429A (en) * 2013-10-22 2014-01-08 中国农业银行股份有限公司 Data coding method and device based on dynamic code rate
CN104702922A (en) * 2013-12-10 2015-06-10 中国电信股份有限公司 Method and system for transmitting video
CN103686346A (en) * 2013-12-26 2014-03-26 乐视网信息技术(北京)股份有限公司 Video playing unsmoothness switching method and system
CN103763216A (en) * 2014-01-24 2014-04-30 深圳市华宝电子科技有限公司 System and method for adjusting data transmission
CN104254018B (en) * 2014-03-19 2018-04-03 深圳深讯和科技有限公司 Method and apparatus for processing video frames in multimedia playback
CN105263066A (en) * 2014-06-13 2016-01-20 珠海全志科技股份有限公司 Mobile equipment video stream transmission control method and system
CN105491320A (en) * 2014-09-16 2016-04-13 鸿富锦精密工业(深圳)有限公司 Video conference bandwidth management method and system
CN105812837A (en) * 2014-12-30 2016-07-27 华为技术有限公司 Image processing method and image processing device
CN105812838A (en) * 2016-03-17 2016-07-27 深圳市九洲电器有限公司 Multi-screen interaction data sharing method and system
CN105915904A (en) * 2016-05-23 2016-08-31 北京中兴高达通信技术有限公司 Video stream Qos control method for broadband trunking call service
WO2018018445A1 (en) * 2016-07-27 2018-02-01 王晓光 Method and system for sending video advertisement on the basis of video capacity
CN106131618A (en) * 2016-07-27 2016-11-16 王晓光 Video advertisement sending method and system based on video capacity

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1468001A (en) 2002-06-27 2004-01-14 上海汉唐科技有限公司 Media flow self-adapting transmission method based on internet
CN1605075A (en) 2001-12-15 2005-04-06 汤姆森特许公司 System and method for modifying a video stream based on a client or network environment
CN1649408A (en) 2003-10-30 2005-08-03 C&S技术有限公司 Ip video terminal and controlling method
US6973501B1 (en) 2000-06-21 2005-12-06 Adc Telecommunications, Inc. Reducing loss in transmission quality under changing network conditions
US6993689B2 (en) 2000-10-31 2006-01-31 Kabushiki Kaisha Toshiba Data transmission apparatus and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004039034A1 (en) * 2002-10-24 2004-05-06 Telefonaktiebolaget Lm Ericsson (Publ) System and method for reducing initial buffering time for a streaming application
US7606928B2 (en) * 2003-03-21 2009-10-20 Nokia Corporation Method and device for controlling receiver buffer fullness level in multimedia streaming
CN100469072C (en) * 2005-09-29 2009-03-11 西安交通大学 Multi-source flow media transmission QoS control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973501B1 (en) 2000-06-21 2005-12-06 Adc Telecommunications, Inc. Reducing loss in transmission quality under changing network conditions
US6993689B2 (en) 2000-10-31 2006-01-31 Kabushiki Kaisha Toshiba Data transmission apparatus and method
CN1605075A (en) 2001-12-15 2005-04-06 汤姆森特许公司 System and method for modifying a video stream based on a client or network environment
CN1468001A (en) 2002-06-27 2004-01-14 上海汉唐科技有限公司 Media flow self-adapting transmission method based on internet
CN1649408A (en) 2003-10-30 2005-08-03 C&S技术有限公司 Ip video terminal and controlling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104349158A (en) * 2013-07-26 2015-02-11 腾讯科技(深圳)有限公司 Communication video quality adjusting method and relevant equipment and system

Also Published As

Publication number Publication date Type
CN101115196A (en) 2008-01-30 application
WO2008014707A1 (en) 2008-02-07 application

Similar Documents

Publication Publication Date Title
Liang et al. Real-time voice communication over the internet using packet path diversity
US7072291B1 (en) Devices, softwares and methods for redundantly encoding a data stream for network transmission with adjustable redundant-coding delay
US20070165524A1 (en) Rate based congestion control for packet networks
US20070071030A1 (en) Video packet shaping for video telephony
Turletti et al. Videoconferencing on the Internet
US20050021830A1 (en) Data communications method and system using buffer size to calculate transmission rate for congestion control
US20080043644A1 (en) Techniques to perform rate matching for multimedia conference calls
US20090089447A1 (en) Proxy-driven content rate selection for streaming media servers
US20080134005A1 (en) Adaptive Forward Error Correction
US20100027417A1 (en) Method and apparatus for improving bandwith exploitation in real-time audio/video communications
US20020191594A1 (en) Transmitting/receiving method and device therefor
US20030067877A1 (en) Communication system and techniques for transmission from source to destination
US20080101398A1 (en) Transmission scheme dependent control of a frame buffer
US20070115963A1 (en) Maximum transmission unit tuning mechanism for a real-time transport protocol stream
US20080144660A1 (en) Dynamically adjusting bandwidth usage among subscriber streams
EP1742476A1 (en) Scalable video coding streaming system and transmission mechanism of the same system
US20100118114A1 (en) Video rate adaptation for congestion control
CN1468001A (en) Media flow self-adapting transmission method based on internet
US20090216897A1 (en) Method and system for controlling streaming rates
CN1848810A (en) Stream media transmitting rate controlling method
JP2004072720A (en) Media transmission method, transmitting apparatus and receiving apparatus therefor
Su et al. Smooth control of adaptive media playout for video streaming
Baldo et al. RTCP feedback based transmission rate control for 3G wireless multimedia streaming
CN101296184A (en) Method, system and device for data transmission
CN101146204A (en) Quality adjusting method and device for instant communication video

Legal Events

Date Code Title Description
C06 Publication
C10 Request of examination as to substance
C14 Granted