252 results about "Multimedia data transmission" patented technology

A method for effectively implementing real time multimedia data transmission in an Ethernet network that operates in a CSMA/CD (Carrier Sense Multiple Access/Collision Detect) scheme. Real time data gets priority over general data, and uses an MPCP (Multi-Point Control Protocol) of the IEEE 802.3ah EPON to prevent a collision from occurring in real time data transmission, and also prevents delay time variation. An RT-IFG (Real Time Inter-Frame Gap) is defined for real time data, shorter than an IFG, to give priority to the real time data over general Ethernet data. The MPCP is used for transmission of real time data without collision between the real time data.

A method allowing operating parameters, such as the compression ratio and/or the protection ratio for a multimedia data transmission channel to be determined, wherein it includes at least one step during which several values of sensitivity are determined for pairs of values fixed source bit-rate, desired compression ratio, a step where the different values obtained for an operating point of the fixed channel are compared with one another, and a step where the optimum sensitivity value is selected, the sensitivity value being defined taking the desired source bit-rate and the compression ratio into account.

The invention provides a vehicle communication terminal and a vehicle communication system which can be used conveniently and safely by a plurality of drivers for driving the vehicle. The vehicle communication terminal comprises a main processor, a bluetooth chip, an audio input unit, an audio output unit and a rapidly inputting unit. The rapidly inputting unit is used for receiving the external trigger signal connected by operating one key and is connected with a service desk through a main processor. The bluetooth chip is connected with the main processor and is also connected with a bluetooth mobile phone which keeps a certain distance with the bluetooth chip to establish a channel. The vehicle communication terminal is fixed on the front end of the vehicle through a mounting assembly so as to be used by the driver to realize the voice call and the multimedia data transmission conveniently.

The invention discloses a vehicle-mounted information system with the functions of video shooting, data interaction, projection display and navigation, and the vehicle-mounted information system is realized based on a WIFI (Wireless Fidelity) technology. The vehicle-mounted information system comprises an image capture module and a central control terminal, wherein the image capture module is used for recording images in a traveling process in real time and is connected with the central control terminal through a video signal line; and the central control terminal comprises a display connection module, a processor, an audio module, a decoding/coding module, a storage device, a WIFI module and a head-up display module and is used for being connected with intelligent terminals, such as a smart mobile phone, a tablet personal computer and the like through the WIFI, and executing the transmission, cloud backup and remote control of multimedia data. According to the vehicle-mounted information system with the functions of video shooting, data interaction, projection display and navigation, various functions of the traditional vehicle-mounted equipment are organically integrated, and the functions, such as wireless data transmission, remote real-time control, cloud storage, projection display and the like, are additionally provided.

A method for adaptively estimating a transmission rate of multimedia data by monitoring an RTCP network state is provided. The method comprises receiving a real-time transport protocol (RTCP) receiver report packet from a multimedia data reception unit; detecting packet loss rate from the RTCP receiver report packet; and adaptively estimating an available transmission rate according to a range within which the packet loss rate belongs.

The invention of an discloses IP-based Multimedia Subsystem IPTV business systems including: network connection device (102), IPTV service system will be used to connect to the IP Multimedia Subsystem; At least one data storage devices (104), used to store the data providers to provide multimedia data; at least one data transmission devices (106), devoted to the adoption of IP Multimedia Subsystem will be multimedia data transmission from data storage devices to terminal equipment; and at least one terminal equipment (108), will be used for data transmission devices from multimedia data available to the user. This invention will enable SIP-based IMS into the IPTV business systems conversational common platform, which can support a variety of fixed and mobile access methods simultaneously support multiple services, fixed and mobile networks to achieve integration and the achievement of business integration.

A method and system for transmitting (10) a multimedia message, wherein a multimedia message to be transmitted is processed by dividing the multimedia message into at least a first message portion and a second message portion. The first message portion is transmitted to a multimedia message service control element (70), and the second message portion is transmitted to a media charger server element (50). A receiver terminal (20) is notified about the transmission of the multimedia message. The transmission of the first message portion from the multimedia message service control element (70) to the receiver terminal (20) is requested, and the transmission of the second message portion from the media charger server (50) element to the receiver terminal (20) is requested. At the receiver terminal (20) the first message portion and the second message portion are combined for obtaining the multimedia message transmitted.

The invention discloses a method and equipment for multimedia data transmission. A universal mobile terminal and video equipment are matched, multimedia data is collected by utilizing the mobile terminal, and an appropriate coding scheme is selected through combining the hardware specification of the mobile terminal and a connection manner between the mobile terminal and the video equipment, so that the video equipment is capable of implementing optimal multimedia transmission according to the network condition. The performance of a transmission channel and the performance of the terminal are combined and utilized to the greatest extent, and the multimedia data transmission at high quality is implemented. The performance requirements on a set-top box are reduced, the equipment cost for service development is saved and the utilization rate of the equipment is improved.

The invention discloses a transmission method. To overcome the disadvantages that: in the multi-media display system in the prior art, the difference of transmission regions of multi-media data information can inevitably affect the transmission speed of the network to cause the interruption or delay of the playing during the transmission of the data information, as well as the streaming media transmission mode fails to work when the network is disconnected, the invention designs a transmission method that the multimedia information is transmitted by means of the network, a server side uploads the multimedia data information to the network directly in the form of a multimedia compressed file, the multimedia data information is made a compression packing into a data packet through an IP transmission layer of the network TCP/IP protocol and then is sent to a designated client receiving end, the client receiving end makes a one-time download to the multimedia data information and prepares for playing, the data packet is decompressed after the one-time download is finished, and a multimedia player is used to play the multimedia information. The information display mode can allow the client side not to be always connected with the server and reduces the dependency to the network when the multimedia data information is transmitted in the streaming media mode.

A system and method of providing multimedia services regardless of data transfer rate degradation that occurs during implementation of multimedia services through a mobile communication network; including a main server and Bluetooth™ access points connected via the Internet, and a portable terminal including a Bluetooth™ module with wireless access to the Internet via the mobile communication network. The main server transfers multimedia data to the portable terminal via the mobile communication network or via a Bluetooth™ access point. in response to a service request, and the portable terminal typically receives multimedia data via the mobile communication network, but will receive multimedia data via the Bluetooth™ access point when the transfer rate reaches or falls below a reference value, thereby continuously receiving the multimedia data via the Bluetooth™ access point in place of the mobile communication network.

A method for transmitting data of multimedia includes detecting whether data is lost or not by utilizing count value of preset field in transmission stream packet head or count value of preset field in net load packet head and setting error frame mark in multimedia data frame that has lost data if it is.

The invention provides a multimedia data encryption and decryption method and device. The encryption method specifically includes adopting a second level key for encrypting multimedia data and obtaining corresponding encryption key flow; adopting a first level key for encrypting a second level key and obtaining a corresponding transmission key. Since the encryption key flow and the transmission key are transmitted in the network and the first level key as a decryption key is not transmitted in the network, safety of the multimedia data in the network is ensured and a problem that the multimedia data is stolen or tampered is solved. Besides, the invention adopts the second level key for encrypting the multimedia data and adopts the first level key for encrypting the second level key, difficulty of decoding the encryption key flow is increased, thus the multimedia data transmission safety is further improved.

Provided are an apparatus and a method for multimedia data transmission in a cable network using a broadband and physical layer frame structure. The apparatus includes an external network matching module for transmitting data inputted/outputted from/to an external network to a Data Over Cable Service Interface Specification (DOCSIS) Media Access Control (MAC) layer, a DOCSIS MAC processor for transmitting the data from the external network matching module to a corresponding destination, a first downstream physical layer processor for handling an existing standard transmission in the data from the DOCSIS MAC processor, a second downstream physical layer processor for dealing with a new broadband transmission in the data from the DOCSIS MAC processor, and an upstream physical layer processor for providing received data to the DOCSIS MAC processor.

The invention discloses a transmission control method for multimedia data in network equipment. In the transmission control method, the buffer memory of exchange equipment is effectively managed; the buffer management of the exchange equipment is divided into a global control part and a queue control part by combining the sensitive characteristics of multimedia data to time delay and packet loss rate and utilizing dynamic threshold control of the transmission level based on voice quality measurement; in the global control part, the threshold is controlled by judging different transmission scenes to guarantee the transmission property under different transmission scenes; in the queue control part, the threshold is divided and regulated based on the transmission level parameters in the voice quality measurement to guarantee the transmission quality of multimedia; and in the dynamic regulation of the threshold, the regulation is performed by adopting a method for controlling according to proportions, and the network multimedia transmission quality is improved by effectively controlling the buffer resources of the exchange equipment.

The invention discloses an information processing method and electronic equipment. The information processing method is applied to first electronic equipment. Data connection exists between the first electronic equipment and second electronic equipment. The method comprises the steps that in the process of multimedia data transmission between the first electronic equipment and the second electronic equipment, whether the first transmission rate of multimedia data meets a first preset condition is judged; and when the first transmission rate meets the first preset condition, the first parameter of the multimedia data is adjusted from a first value to a second value which is different from the first value so that transmission time delay of the multimedia data is less than a first preset time threshold value. In the aforementioned scheme, the technical effect that the multimedia data are timely sent to the second electronic equipment can be achieved via adjusting the first parameter.

The embodiment of the invention provides a multimedia data transmission method based on a mobile terminal, and the mobile terminal. The mobile terminal at least comprises an MHL interface, a WiHD connection unit and a Miracast connection unit. The method comprises the steps of when detecting the triggering operation of the user aiming at multimedia data currently displayed by the mobile terminal, deciding a target connection unit from the MHL interface and/or the WiHD connection unit and/or the Miracast connection unit; and transmitting the multimedia data into a display device by a target connection unit, wherein the display device is used for displaying the multimedia data. According to the multimedia data transmission method based on the mobile terminal, the user can achieve the best screen projection effect under the current network environment, and the user experience is enhanced.

The invention discloses a multimedia data output method and equipment. In multi-screen interactive business, conventional set top box is optimized. According to display capacity information of other display devices, the set top box caches the multimedia data as multimedia data of different display statuses rather than transmitting multimedia data sent by a display device to other display devices directly (for example, the set top box caches the original high resolution multimedia data as low resolution multimedia data). According to the display statuses of the cached various multimedia data, the set top box transmits the multimedia data to the display device with suitable display capacity information, so that the display devices of different display capacity can display the received multimedia data correctly after receiving the multimedia data transmitted by the set top box.

The invention discloses a multi-media data transmission method, system and device, which is used for realizing transmission of differentiated video streams with different service qualities in a China mobile multimedia broadcasting (CMMB) system. The method comprises the following steps: encoding the video streams in a video service to generate a code stream in a base layer and at least one code stream in an enhancement layer; carrying out capsulation on the generated code stream in the base layer and each generated code stream in the enhancement layer in a same multiplexing subframe of a broadcast channel frame; performing capsulation on decoding information on the code streams in each layer in the multiplexing subframe; and sending the broadcast channel frame. According to the embodiment of the invention, the code stream in the base layer and the at least one code stream in the enhancement layer are sent in the multiplexing subframe, thus realizing transmission of video streams of a switching virtual circuit (SVC) in the CMMB system.

In a system for transmitting multimedia data including video data, audio data, graphic data, text data and the like via a network, sets of media data are stored in a plurality of servers in a distributed state. When requested multimedia data is assigned from a transmitter, necessary sets of data from among media data stored in the servers in a distributed state are acquired by corresponding receivers in accordance with the assignment. A synchronization control unit and a multiplexer multiplex the acquired media data based on time stamps of the data, and transmit multimedia data after the multiplexing to a client which has assigned the multimedia data. According to such a configuration, distributed multimedia servers can be constructed without taking into consideration of influence by the effective rates of transmission channels from the respective servers.

The invention is applicable to the technical field of communication, and provides a multimedia data sharing method and device. A terminal is provided with a wifi module which supports a direct connection protocol. The method comprises the following steps: a detection request message is sent; a detection reply message and a connection request message are received; whether a connection reply message is sent to a second terminal is decided according to the received detection reply message and the connection request message; when the connection reply message is sent, master-slave connection is established with the second terminal for operational capacity negotiation, and point-to-point session connection is established for multimedia data transmission. According to the multimedia data sharing method and device, the wifi module which supports the direct connection protocol is used, by means of extending the detection request message and the other messages in a P2P extension package, the master-slave connection is established with the second terminal for operational capacity negotiation, the point-to-point session connection is established for multimedia data transmission, and therefore transmission and sharing of multimedia files can be realized with no need for support from a router and too much cost.

The invention discloses an intelligent dialog device and method with a scene analysis function. The intelligent dialog device comprises a speech input module, a communication module, a data processing server, a GPS positioning device, a camera device, a content server and an output module, wherein the speech input module collects speech information input by a user; the GPS positioning device acquires location information of the user; the camera device acquires image information of the user; and the data processing server acquires current scene information of the user according to the speech information, the location information and the image information, calls corresponding multimedia data from the content server and transmits the multimedia data to the output module through the communication module for output. Through the intelligent dialog device and method, scene analysis can be performed on the user when the user performs a man-machine dialog, so that the accuracy and pertinence of the man-machine dialog are enhanced; a targeted reply and feedback are made to the user by analyzing the true scene condition of the user, and therefore the accuracy of the man-machine dialog is improved.