摘要:
A process for distributing a video stream to a multitude of destinations including marking by adding to the video stream at least a visual element such that the marking is applied to an original video stream common to selected recipients, and personalized for a least portion of the recipients by addition of a visual element specific to destination equipment.
摘要:
A process for distributing digital still images according to a nominal format, where each image is broken into blocks and macroblocks that depend upon each other by correlation coefficients including analyzing contents of the still images to generate two parts: a) a primary contents in nominal format corresponding to the image as modified by substitution of certain correlation coefficients with coefficients that are of the same type, but which are random, and b) additional digital nature of any format, which includes substituted correlation coefficients and digital data that are likely to allow reconstruction of the modified image; transmitting separately the modified primary contents in real or deferred time and additional digital information in real time at a moment of viewing from a server towards recipient equipment; and calculating a synthesis of contents of the recipient equipment that is in nominal format as a function of the modified primary contents and the additional data.
摘要:
A procedure for distributing audiovisual sequences according to a nominal format of a stream including a succession of frames including before transmission to destination equipment, performing an analysis of the stream to generate a first modified stream having format of the nominal stream and having images modified by substitution of selected data by data of the same nature, but calculated in a random fashion or in relation to an algorithm, and a second stream of any format, including the substituted data and the numerical information capable of allowing reconstruction of the modified stream, separately transmitting, in real time or at different times, two streams thus generated from a server to the destination equipment, and calculating on the destination equipment a synthesis of the stream of nominal format as a function of the first stream and the second stream such that transmission of the second stream is achieved by initializing communication, wherein a user provides identification at the server, which responds to the user who in turn verifies successful communication with the server, and exchanging information between the user and the server in which every message from the user is identified at the server with an identifier of the user sent by the server and every message from the user is identified at the user by an identifier of the server sent by the user.
摘要:
A process for distributing digital video sequences in accordance with a nominal stream format including a succession of frames, each frame including at least one digital block regrouping a plurality of coefficients corresponding to simple, digitally coded visual elements, including: a step of modifying at least one block of the stream, wherein the modification step acts in an adaptive manner on the original stream as a function of at least a part of characteristics representative of structure, contents and parameters of an original video stream, of a profile of an addressee, and of external events, and the modification step includes replacing a part of the coefficients to produce a modified main video stream in nominal format and complimentary modification information that allows reconstruction of the original stream by a decoder of addressed equipment, and wherein the scope of modifications is variable and determined by the representative characteristics, and the modified main video stream and the complementary information are transmitted by separate paths.
摘要:
A link for transmitting digital information is time-shared between a plurality of units under the control of one of the units called the control unit. The control unit communicates with the other units by means of individually addressed signaling cells enabling it to interrogate each unit regularly as to its current status and its requirements for communication via the link and to advise it of at least one particular frame time slot for sending a response and others for sending cells. The invention also concerns units for implementing this method.
摘要:
Protocol adapter equipment for a telephone set including a processing unit (14) provided with hardware and software means organized to enable the telephone set to operate in compliance with a circuit mode communications protocol via a communications link (3) of a telephone network (4), and a telephone set provided with such equipment. The equipment includes a coupler (18) enabling it to operate in packet mode via the communications link in addition to the coupler (17) enabling it to operate in circuit mode, the two couplers being connected to said communications link via a selective switching member (16) and being governed by the processing unit of the set, which unit is provided, for this purpose, with means including a packet mode protocol manager (20) in addition to a circuit mode protocol manager (19).
摘要:
The system includes centralizing communications equipment (4) provided with first transmitter-receiver means (5, 6) connected to at least one transmit and receive cable (3) for transmitting and receiving radio signals, which cable extends throughout the served installation. The system also includes subscriber terminal appliances (2A to 2E) located in the installation and provided with second transmitter and/or receiver means (8 to 12) for transmitting and/or receiving radio signals, which means enable the terminal appliances to communicate via the communications equipment. The communications equipment re-transmits the signals that it receives to each destination terminal appliance in the installation and, with the assistance of additional means (27 to 31), outside said installation. The subscriber terminal appliances and the centralizing communications equipment respectively include means enabling them to transmit and/or receive digitized information signals in the form of packets and via radio links.