67 results about "Media transfer protocol" patented technology

A system and related techniques relate to the retrieval of a media object list with associated properties from a media device such as a digital video camcorder, audio player or other source or device. According to embodiments the retrieved list or set of media objects and their attributes or properties, for example a song list along with song length, codec, artist and other information may be retrieved from the source device, along with a representative sample of the media or content of each object. So the title which identifies a song may be accompanied by a short sound clip of a representative sample of that song, or a title identifying a digital video movie may be accompanied by a short video clip of an introductory portion of that movie. According to the invention in one regard, that representative sample may be generated in the source device and encapsulated into the set of properties which are passed with the object identifier to an initiator device, such as a user's computer accessing a video camera for downloading. A media object which is stored in monolithic binary format with no predetermined internal samples may nevertheless be accessed and sampled to allow a user to view or listen to representative content, through encapsulation of a sample in the properties passed via an underlying media transport protocol.

The present invention discloses a method for setting media streaming parameters on a UPnP-based network which can improve quality of media. The method for setting the media streaming parameters on the UPnP-based network can improve media playing quality and efficiently use resources of each device, by allowing an AV control point to monitor states of UPnP devices regardless of a media transfer protocol, transmit traffic transfer parameters for optimum quality of media to each UPnP device, and automatically set optimum parameters or make each UPnP device set the optimum parameters upon the user's request.

Methods, systems and computer program products to implement extensions of the Media Transport Protocol (MTP) are provided herein. The methods include opening a session between an initiator and a responder, exchanging one or more of device and system information and sending one of an operation or event based on media player application features. The operation includes one or more of a dataset, response code, operation parameter and response parameter. In an embodiment, the extensions enable the initiator and responder to manage connections efficiently between devices, send media player application information to a media player device, exchange device and system information, manage digital rights, monitor system security and specify properties within one or more extensions of MTP. These extensions may be in the form of one or more of an operation, an event, a dataset or property code.

Methods, systems and computer program products to implement extensions of the Media Transport Protocol (MTP) are provided herein. The methods include opening a session between an initiator and a responder, exchanging one or more of device and system information and sending one of an operation or event based on control and status information. The operation includes one or more of a dataset, response code, operation parameter and response parameter. The methods also include sending or receiving one of an operation or event based on remote URL information. The operation includes one or more of a dataset, response code, operation parameter and response parameter. These extensions may be in the form of one or more of an operation, an event, a dataset or property code.

Methods and systems for preventing reception of licensed protected content prior to reception of a license, in a content rendering device wherein, the license corresponds to the licensed protected content and to the content rendering device. The license may be stored on the content rendering device in a database that may be searchable by a key. The license and the key may be associated within a file comprising the licensed protected content. A proxy computer may handle operations for the content rendering device, a DRM license server and a content server. Media Transfer Protocol (MTP) features regarding GetDeviceInfo, SendObjectInfo and SendObjectPropList operations may be utilized to activate DRM license protection for receiving the license prior to the corresponding license protected content. The content rendering device may reject transmission of and reject rendering the corresponding license protected content if the license is not resident in its database.

The invention relates to a media data transmission system, method and device, and a storage medium, and belongs to the technical field of communications. The system comprises a sending end for acquiring an encryption key and a key identification of the encryption key according to a dynamic key strategy, encrypting media data to be sent according to the encryption key to acquire encrypted media data, encapsulating the encrypted media data and the key identification by using an extended media transmission protocol to acquire a media data packet, and sending the media data packet to a receiving end through a media transmission channel; and the receiving end for acquiring the key identification in the media data packet, acquiring a decryption key corresponding to the encryption key according to the key identification, and decrypting the encrypted media data in the media data packet according to the decryption key to acquire the media data. The technical problem that a video conference is required to be interrupted in need of replacement of the encryption key can be solved; the continuity of a session can be improved; and the key updating efficiency is improved.

The invention is suitable for the field of multimedia application, and provides a DLNA (Digital Living Network Alliance)-based digital family interaction method and system and corresponding device. The DLNA-based digital family interaction method comprises the steps that: a mobile device establishes a connection with a media terminal through a DLNA protocol to obtain media transmission protocol information supported by the media terminal; the mobile device establishes a connection with a CDN (Content Distribution Network) cloud end to obtain on-demand information to ensure that the CDN cloud end distributes a matched DLNA cloud end CDN server according to the on-demand information and transmits the corresponding media transmission protocol information to the mobile device; and the media terminal device obtains media transmission protocol information of the matched DLNA cloud end CDN server and establishes a connection with the DLNA cloud end CDN server to obtain media data and play the media data. The method, system and corresponding device disclosed by the invention can be used for realizing multi-screen interaction between the media terminal and the mobile terminal, can be realized on the whole internet without customizing software on the media terminal, and is wide in use range.

Provided are a method of preventing data leakage from a portable terminal and an apparatus employing the method. The method includes checking whether computer identification (ID) data from a computer is received when the portable terminal is connected to the computer using a media transfer protocol (MTP). A computer authentication using the computer ID data is performed when the computer ID data is received.

The invention relates to a master sound box. The master sound box communicates with a terminal and a slave sound box, and comprises a receiving module, a resource address sending module, a notification sending module, a first real-time playing module and an active synchronizing module, wherein the receiving module is used for receiving an audio resource address of the terminal via a streaming media transmission protocol; the resource address sending module is used for, after receiving the audio resource address of the terminal, sending the audio resource address from the sound box; the notification sending module is used for sending a notification of acquiring audio by accessing the audio resource address and playing the audio in real time to the sound box; the first real-time playing module is used for, after sending the notification to the sound box, acquiring the audio by accessing the audio resource address, and playing the audio in real time; and the active synchronizing module is used for, when the audio is played in real time, sending synchronous calibration information to the sound box. The invention further provides a slave sound box and a method for controlling synchronous playing of audio by a router. The invention achieves the effect of synchronous playing of multiple wireless sound boxes, and can be applied to classrooms, playgrounds, subways and other similar places.

The invention discloses an audio/video live broadcast method. The method comprises the following steps: collecting bitmap data of an electronic whiteboard in a browser and audio data and video data recorded by a terminal itself in real time; converting the collected bitmap data of the electronic whiteboard into a binary format streaming data, and sending the streaming data to a server through an encrypted streaming media transmission protocol; and sending the collected audio data and video data recorded by the terminal itself to the server through a video coding/decoding protocol. The invention also discloses an audio/video live broadcast system, a client and the server. With the technical scheme provided in the invention, the audio/video can be recorded in real time under the condition of not downloading any plug-in or client software.

The invention discloses a real-time streaming media transmission protocol stack in a multi-hop network. A packet control layer and an error control layer are added to an existing transmission control protocol (TCP)/internet protocol (IP) stack. The real-time streaming media transmission protocol stack in the multi-hop network has the advantages that an IP header and a TCP header are compressed by the packet control layer, and the obtained compressed headers reduce data redundancy; the compressed headers are subjected to broadcast channel (BCH) encoding, the encoded headers are uniformly distributed to data portions, the resistance to burst interference of the headers is improved, a receiver can obtain accurate header information through BCH decoding, thereby packet loss and retransmission are avoided, and time delay caused by retransmission is reduced; and a cyclic redundancy check (CRC) single bit error correction based reed-solomon (RS) errors-and-erasures correcting encoding and decoding scheme of the error control layer is utilized, the good communication effect can be guaranteed under the channel with short burst as a majority and accompanied with a small quantity of random errors, and the time delay is excellently controlled.

The invention discloses a method for simultaneously controlling multiple media devices in a grouped mode through the DLNA. The method includes the following steps: a DMC device and the DLNA network build a data transmission channel, and the DMS devices and the DMR devices in the DLNA network are searched and displayed in a classified and listed mode; a user creates groups according to requirements, and meanwhile corresponding device lists in the groups are associated in the background; the groups in the DMR device list are selected; multimedia files of the DMS devices are browsed and selected for playing, URL resource address information, media transmission protocols and media formats of the multimedia files are obtained, URL resource addresses of the multimedia files selected for displaying are set in the selected DMR devices, and the multimedia files are played. By means of the method, grouping management can be carried out on the DMR devices, the DMR devices in different groups can play the same multimedia files at the same time, the playing states of the DMR devices in the selected groups can be controlled, flexibility is achieved, and the requirements for diversification and personalization can also be met.

The invention relates to a method simultaneously suitable for a wired network real-time streaming media transport protocol and a wireless network real-time streaming media transport protocol, which is characterized by comprising the following steps: a, a sending end sends TFRC data packets; b, a receiving end receives the TFRC data packets and also calculates previous-time packet loss ratio p; c, the receiving end returns the information of the packet loss ratio p to the sending end through ACK packets, and when TFRC data packets with the number of b are received, one ACK packet is returned; and d, after the sending end receives the ACK packets, the TFRC data packets calculate a new sending speed rate Tcalc according to a Veno fomula. The invention enables the TFRCVeno to have good transmission performance in a wired network and a wireless network, greatly enhances the performance of the TFRC data packets in the wireless network, also ensures the fairness of the TFRC data packets and the friendliness of the TFRC data packets to other TCP transmissions, is simple and fast and has low cost.

The invention is suitable for the technical field of communication, and provides a file processing method, a mobile terminal and a computer readable storage medium. The method includes the steps of obtaining information of a newly-added file when the magnetic disk newly-added file of the mobile terminal is detected and the mobile terminal and a peripheral device are in a media transfer protocol (MTP) connecting mode, obtaining a second catalog ID of the newly-added file according to a first catalog ID of the newly-added file in the information of the newly-added file, storing the information of the newly-added file under a second catalog of the newly-added file in a virtual file system of the mobile terminal, receiving displaying request information, and sending the information of the newly-added file stored in the virtual file system to the peripheral device if the catalog ID in the displaying request information is the second catalog ID of the newly-added file. By means of the method, when the file is operated through the mobile terminal, the real-time refreshing of the peripheral device can be achieved.

Intentionally dropping packets to prevent unauthorized transfer of data through multimedia tunnels is disclosed. A stream of media transport protocol packets is received. One or more packets are dropped intentionally from the stream to render unusable at the destination a file or other data transported through the multimedia tunnel without authorization.

The invention provides a streaming media service traffic record merged-processing method and device. The streaming media service traffic record merged-processing method comprises the following steps of: judging media transmission protocol types of first traffic records in an original traffic record file; and carrying out merged processing on the first traffic records with same media transmission protocol type according to a judged judgment result. According to the technical scheme of the invention, the storage space is reduced and storage resources are saved.

The invention provides an online live video player. The online live video player comprises a player interface component which is used for receiving a playing time adjustment instruction, a protocol switching component which is used for determining whether a current first stream media transmission protocol is switched to a second stream media transmission protocol according to the playing time adjustment instruction, and a playing control component which is used for carrying out video live broadcast or replaying according to the stream media transmission protocol determined by the determining result of the protocol switching component. The first stream media transmission protocol is selected from one of a live broadcast stream media transmission protocol and a replaying stream media transmission protocol, while the second stream media transmission protocol is the other. The invention further provides a corresponding video playing method. According to the invention, two protocols are used for switching; the characteristic of great live broadcast instantaneity of the stream media real-time transmission protocols is used; delay time produced by replaying in live broadcast in the prior art is reduced; and dual demands of live broadcast and replaying at any time are perfectly met.

The invention discloses a method and device for reducing an MTP (Media Transfer Protocol) delay of VR (Virtual Reality) equipment. The method comprises the following steps: respectively acquiring refresh time of a left-eye display screen and refresh time of a right-eye display screen; staggering the refresh time of the left-eye display screen from the refresh time of the right-eye display screen by half a display screen refresh time interval; and performing rendering displaying on a picture according to the refresh time of the left-eye display screen and the refresh time of the right-eye display screen, which are staggered. The method disclosed by the invention achieves a technical effect of implementing the method for reducing the MTP delay of the VR equipment by doubling a variable within unit time of receiving pictures by human eyes, so that the technical problem that the MTP delay cannot be effectively reduced due to a limit of related hardware technologies is solved.

The invention discloses a file transfer method. The method comprises the steps as follows: controlling a mobile terminal to enter a preset MTP (media transfer protocol) safe mode when establishing MTPconnection between the mobile terminal and a computer; detecting whether the mobile terminal receives a file shear instruction initiated by the computer in the MTP safe mode; if yes, acquiring a corresponding to-be-sheared file from the mobile terminal, after copying the to-be-sheared file to a locally preset MTP safe folder of the mobile terminal for backup, shearing and pasting the to-be-sheared file to the computer. The invention also discloses the mobile terminal and a computer readable storage medium. The problem that transfer files are easy to lose during MTP file transfer between the mobile terminal and the computer can be solved.

The invention relates to a wireless digital television screen projection method and device, computer equipment and a storage medium, and the method comprises the steps: connecting wireless digital television equipment WiFi through a control terminal, and receiving video information; receiving a screen projection request input by a user through the terminal; establishing a temporary media stream storage pool and an http protocol access link according to the screen projection request; sending the http protocol access connection to a screen projection player; and finally, projecting the video information to the projection screen player through the temporary media stream storage pool and the http protocol access link. According to the method, the DLNA screen projection protocol requirement is met by establishing the temporary storage pool and constructing the http media transmission protocol, so that the television content of the wireless digital television equipment is projected from a mobile phone end to screen projection terminals such as a television, a tablet computer and a screen projector to be played; and the screen projection function of the portable wireless digital television is realized.

Disclosed is an FTP application layer packet filtering method comprising the following steps: when establishing a file transfer protocol (FTP) control channel transmission control protocol (TCP) connection, obtaining a first transmission control protocol synchronous (TCP SYN) packet sent by a client and forwarding same to an FTP server; detecting whether the FTP server response packet is a synchronize-acknowledgment (SYN-ACK) TCP packet and, if not, discarding same; detecting whether the client response packet is an ACK TCP packet and, if not, discarding same; establishing a data flow table in order to record and update FTP status. Additionally provided is an FTP application layer packet filtering device. The above method and device are capable of avoiding and protecting against FTP application layer attacks and ensuring the secure, reliable transmission of FTP operations.

The present disclosure relates to a mobile terminal, and more particularly, to a mobile terminal for updating data files stored in a memory on a database and a control method thereof, and a mobile terminal for updating data files on a database according to the media transfer protocol (MTP) may include a memory configured to store the data files, and a controller configured to divide the data files stored in the memory into a first group composed of files to which the priority order of update is given and a second group composed of files other than those of the first group, and sequentially update the first group and the second group on the database to implement an application using data files contained in the first