Abstract: A transmission apparatus includes a video obtainer configured to obtain a video signal, a first converter configured to convert the video signal into an electrical signal complying with a high definition multimedia interface (HDMI (registered trademark)) standard, a second converter configured to convert the video signal into an optical signal, and a signal processor configured to perform at least one of the conversion using the first converter and the conversion using the second converter with respect to the obtained video signal.

Abstract: A cable assembly includes a cable, a connector that is provided at an end of the cable in a direction in which the cable extends, a plurality of electric transmission lines configured to transmit an electric signal, and a plurality of optical transmission lines configured to transmit an optical signal. The plurality of electric transmission lines and the plurality of optical transmission lines are provided in the cable assembly so as to extend across the cable and the connector. The plurality of optical transmission lines are provided so that at least one of the plurality of optical transmission lines is provided at each of ends of the cable assembly in a width direction perpendicular to the direction in which the cable extends. The plurality of electric transmission lines are provided inside the plurality of optical transmission lines in the width direction.

Abstract: A cable assembly includes a cable, a connector that is provided at an end of the cable in a direction in which the cable extends, a plurality of electric transmission lines configured to transmit an electric signal, and a plurality of optical transmission lines configured to transmit an optical signal. The plurality of electric transmission lines and the plurality of optical transmission lines are provided in the cable assembly so as to extend across the cable and the connector. The plurality of optical transmission lines are provided so that at least one of the plurality of optical transmission lines is provided at each of ends of the cable assembly in a width direction perpendicular to the direction in which the cable extends. The plurality of electric transmission lines are provided inside the plurality of optical transmission lines in the width direction.

Abstract: A cable assembly includes a cable, a connector that is provided at an end of the cable in a direction in which the cable extends, a plurality of electric transmission lines configured to transmit an electric signal, and a plurality of optical transmission lines configured to transmit an optical signal. The plurality of electric transmission lines and the plurality of optical transmission lines are provided in the cable assembly so as to extend across the cable and the connector. The plurality of optical transmission lines are provided so that at least one of the plurality of optical transmission lines is provided at each of ends of the cable assembly in a width direction perpendicular to the direction in which the cable extends. The plurality of electric transmission lines are provided inside the plurality of optical transmission lines in the width direction.

Abstract: An AV signal input/output system includes an AV signal output device, an AV signal input device, and a cable which connects between the devices. The AV signal output device includes an existing interface, an optical interface, a selection output controller which selects existing interface differential signals or optical output signals, and outputs an AV signal, and an information identification unit which reads out information of the connected destination of a connector through existing interface signal lines. The information identification unit includes an optical information identification unit which identifies optical information. The AV signal input device includes an existing interface, an optical interface, a selection input controller which selects existing interface differential signals or optical input signals, and outputs an AV signal, and information storage which causes a connector to read out information through existing interface signal lines.

Abstract: A cable assembly includes a cable, a connector that is provided at an end of the cable in a direction in which the cable extends, a plurality of electric transmission lines configured to transmit an electric signal, and a plurality of optical transmission lines configured to transmit an optical signal. The plurality of electric transmission lines and the plurality of optical transmission lines are provided in the cable assembly so as to extend across the cable and the connector. The plurality of optical transmission lines are provided so that at least one of the plurality of optical transmission lines is provided at each of ends of the cable assembly in a width direction perpendicular to the direction in which the cable extends. The plurality of electric transmission lines are provided inside the plurality of optical transmission lines in the width direction.

Abstract: A transmission apparatus includes a video obtainer configured to obtain a video signal, a first converter configured to convert the video signal into an electrical signal complying with a high definition multimedia interface (HDMI (registered trademark)) standard, a second converter configured to convert the video signal into an optical signal, and a signal processor configured to perform at least one of the conversion using the first converter and the conversion using the second converter with respect to the obtained video signal.

Abstract: A connector includes a receptacle connectable to the conventional plug being compliant with an HDMI specification, and a plug connectable to the receptacle. The receptacle includes a tubular body forming a holding space that enables insertion of the conventional plug, a first recessed part forming a space that narrows heading from the holding space in an insertion direction of the plug, and a first transmission body having, as an end of an optical transmission line, a first end that is disposed to be exposed to the inserted plug. The plug includes an insertion part shaped to be insertable into the tubular body, a first projection that projects from the insertion part in the insertion direction and can fit into the first recessed part, and a second transmission body having, as an end of an optical transmission line, a second end that is disposed to face the first end.

Abstract: An AV signal input/output system includes an AV signal output device, an AV signal input device, and a cable which connects between the devices. The AV signal output device includes an existing interface, an optical interface, a selection output controller which selects existing interface differential signals or optical output signals, and outputs an AV signal, and an information identification unit which reads out information of the connected destination of a connector through existing interface signal lines. The information identification unit includes an optical information identification unit which identifies optical information. The AV signal input device includes an existing interface, an optical interface, a selection input controller which selects existing interface differential signals or optical input signals, and outputs an AV signal, and information storage which causes a connector to read out information through existing interface signal lines.

Abstract: A connector includes a receptacle connectable to the conventional plug being compliant with an HDMI specification, and a plug connectable to the receptacle. The receptacle includes a tubular body forming a holding space that enables insertion of the conventional plug, a first recessed part forming a space that narrows heading from the holding space in an insertion direction of the plug, and a first transmission body having, as an end of an optical transmission line, a first end that is disposed to be exposed to the inserted plug. The plug includes an insertion part shaped to be insertable into the tubular body, a first projection that projects from the insertion part in the insertion direction and can fit into the first recessed part, and a second transmission body having, as an end of an optical transmission line, a second end that is disposed to face the first end.

Abstract: An AV signal transmission and receiving system capable of appropriately receiving an AV signal includes a source apparatus and a sink apparatus connected to the source apparatus via an HDMI (registered trademark) cable. The sink apparatus includes: an AV signal receiving unit which receives an AV signal via the HDMI cable; a memory which holds the EDID; a rewriting unit which rewrites the EDID; an HPD control unit which controls output of an HPD signal; and a determining unit which: determines whether the AV signal which has been received is an HDMI signal conforming to an HDMI standard or a digital visual interface (DVI) signal; and when the determining unit determines that the AV signal is a DVI signal, instructs the rewriting unit to rewrite the EDID and instructs the HPD control unit to output the HPD signal indicating that reading of the EDID which has been rewritten is possible.

Abstract: An AV signal transmission and receiving system capable of appropriately receiving an AV signal includes a source apparatus and a sink apparatus connected to the source apparatus via an HDMI (registered trademark) cable. The sink apparatus includes: an AV signal receiving unit which receives an AV signal via the HDMI cable; a memory which holds the EDID; a rewriting unit which rewrites the EDID; an HPD control unit which controls output of an HPD signal; and a determining unit which: determines whether the AV signal which has been received is an HDMI signal conforming to an HDMI standard or a digital visual interface (DVI) signal; and when the determining unit determines that the AV signal is a DVI signal, instructs the rewriting unit to rewrite the EDID and instructs the HPD control unit to output the HPD signal indicating that reading of the EDID which has been rewritten is possible.

Abstract: In a system which attaches update information required to create a content key used for content encryption/decryption to encrypted content and transmits the encrypted content, there is used an authorized content verification method including a verification request step of, by a receiver, transmitting an authorization verification request including update information received from a transmitter, an update information check step of, by the transmitter, checking whether the update information included in the received authorization verification request is predetermined update information, a message-of-acceptance transmission step of creating a message of acceptance using the update information and an exchange key shared between the transmitter and the receiver and transmitting the message of acceptance if the update information matches the predetermined update information, and an authorized content determination step of, by the receiver, determining that content is authorized content on the basis of reception of

Abstract: A system including a server holding content and a terminal using the content, whereby the terminal is registered in the server if a communication time between the terminal and the server is less than or equal to a reference value. A measuring unit of the server measures a communication time from transmitting measuring information to the terminal until receiving response information from the terminal, and repeats the transmission, the reception, and the measurement until the measured communication time is less than or equal to the reference value. An elapsed-time measuring unit measures an elapsed time from when the measuring unit first begins measuring the communication time, and a transmission unit transmits, to the terminal, status notification information showing a processing status depending on the elapsed time. A response unit of the terminal receives measuring information from the server and transmits response information to the server when the measuring information is received.

Abstract: The conventional data transmitting/receiving system has problems: that a correct measurement cannot be performed because a measurement result is an addition of a verification processing time and a transmission time; that an authentication processing which is necessary for a transmission time measurement processing needs to be separately required; and that an unnecessary key exchange processing is executed.

Abstract: A packet transmitting apparatus (401) capable of transmitting a copyright-protected content across an IP network includes: a transmission condition setting/managing unit (403) that extracts from inputted non-A/V data or A/V data at least one information of billing information, reproduction control information, copy control information for the A/V data, and packet output control information, and generate encryption mode information indicating an encryption mode which becomes a condition during transmission of the A/V data; an encrypted data generation unit (422) that encrypts inputted A/V data based on a transmission condition determined by combining input terminal information, data format information, and attribute information, and adds an encryption information header based on the encryption mode information and time-based discontinuity information to the encrypted A/V data so as to generate encrypted data; and a packetization unit (406) that generates a packet by adding a packet header and information repre

Abstract: To provide a packet transmitter apparatus which can transmit contents protected by a content protection technique such as DTCP or the like, using packets such as IP packets which have become widespread. The packet transmitter apparatus includes a transmitting condition setting management unit (404) which extracts at least one of charge information, playback control information and copy control information of AV data from the inputted non-AV data or AV data and generates, based on the extracted information, encryption mode information indicating an encryption mode which becomes a condition at the time of transmitting the AV data; an encrypted data generation unit (406) which generates encrypted data by encrypting, based on the transmitting condition, the inputted AV data and adding encryption information headers based on the encryption mode information to the encrypted AV data; and a packet generation unit (403) which generates packets by adding packet headers to the generated encrypted data.

Abstract: A device registration system including a server which holds content and a terminal apparatus which uses content, whereby the terminal apparatus is registered in the server if a communication time between the terminal apparatus and the server is less than or equal to a reference value. A measuring unit of the server measures the communication time, being a time period from transmitting measuring information to the terminal apparatus until receiving response information from the terminal apparatus, and repeats the transmission, the reception, and the measurement until the measured communication time is less than or equal to the reference value. An elapsed-time measuring unit measures an elapsed time from when the measuring unit first begins measuring the communication time, and a transmission unit transmits, to the terminal apparatus, status notification information showing a processing status which depends on the elapsed time.

Abstract: A device registration system for registering a terminal device for obtaining and using contents in a server that stores contents. The server stores a contents list indicating contents stored and a registration list for registering specific information to the terminal device. The server receives the specific information and transmits the contents list to the terminal device. The terminal device receives a selection of a content from the contents list according to input by a user and requests the server to transmit the selected content. When the specific information to the terminal device of the request source is not registered in the registration list, the server performs a registration process and transmits the requested content to the terminal device.

Abstract: The conventional method of limiting the number of receiving apparatus has a problem that if the limited number of appliances is reduced to limit distribution to unspecified appliances outside a home, distribution to appliances in the home is limited unnecessarily. If the limited number of appliances is increased, distribution to appliances outside the home cannot be sufficiently limited. The invention provides at least one receiving apparatus, (e.g., digital television sets and PCs,) connected to a network and capable of receiving and using predetermined data, and a transmitting apparatus, (e.g., an AV server) for transmitting the data to the receiving apparatus via the network. Use of the data on the network is managed based on the transmission time required for transmission of predetermined information between the transmitting apparatus and the receiving apparatus.