Abstract: According to one embodiment, an AV device comprises a receiving section, a processing section, a storage section and a control section. The receiving section receives a digital voice signal. The processing section applies a predetermined signal processing operation to the digital voice signal received by the receiving section. The storage section stores information indicating time required for the signal processing operation at the processing section, and when a voice has been set in a mute state, stores the information indicating the time required for the signal processing operation by the processing section which is rewritten into a value that cannot be taken in general. The control section outputs information stored in the storage section upon an external request. Other embodiments are also described.

Abstract: According to one embodiment, a power supply circuit includes a source, a sink, and a connection unit. A first control circuit of the source is configured to send an inquiry about the presence/absence of a power supply function to a second control circuit of the sink using a first line, to turn on a changeover switch and turn off a power reception notification switch when a response indicating the presence of the power supply function is received, and to send a power supply request to the second control circuit using the first line, and the second control circuit is configured to turn on a power supply switch and turn off a power source direction notification switch when the power supply request is received from the first control circuit, and to continue power supply during a first level period of a potential of the second line.

Abstract: According to one embodiment, a bidirectional communication interface apparatus including, a first converting module configured to convert a mixed output of a video signal and audio signal from a source device to an optical signal, an optical cable configured to transmit the optical signal converted by the first converting module, and a second converting module configured to convert the optical signal transmitted via the optical cable to a mixed output of a video signal and audio signal and input a result of conversion to a sink device.

Abstract: According to one embodiment, video image and audio signals are transmitted to a plurality of electronic devices each having at least one of a video image display function and an audio reproducing function. Information indicating the fact that at least one of a video image and audio has been set in a mute state is acquired from each of the electronic devices. Based on the information, a processing operation is applied to the video image and audio signals supplied to each of the electronic devices.

Abstract: According to one embodiment, video image and audio signals are transmitted to a plurality of electronic devices each having at least one of a video image display function and an audio reproducing function. Information indicating the fact that at least one of a video image and audio has been set in a mute state is acquired from each of the electronic devices. Based on the information, a processing operation is applied to the video image and audio signals supplied to each of the electronic devices.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: According to one embodiment, video image and audio signals are transmitted to a plurality of electronic devices each having at least one of a video image display function and an audio reproducing function. Information indicating the fact that at least one of a video image and audio has been set in a mute state is acquired from each of the electronic devices. Based on the information, a processing operation is applied to the video image and audio signals supplied to each of the electronic devices.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: The present invention provides a data reading method, and a video transmitter and a video receiver using the same in which there is no video interruption time or a video interruption time is short during rewriting of EDID. In a video transmitter which transmits a digital video signal obtained by performing a contents protection process to a video receiver through digital interfaces, after the video transmitter reads information related to the characteristics of the video receiver and performs a default setting of a video signal format on the basis of the information by a default setting process to be executed when power is started to be supplied from the video transmitter to the video receiver, the video transmitter performs a CP process and transmits a digital video signal.

Abstract: According to one embodiment, a repeater receives content data from a sender device through a first content protection technology and transmits the content data to another device through a second content protection technology. The repeater includes a receiver, a preparation module, and a transmitter. The receiver receives identification information that identifies a device compliant with the second content protection technology through the second content protection technology. The preparation module prepares an identification information list based on the first content protection technology that contains the identification information based on the second content protection technology received by the receiver and identification information based on the first content protection technology that identifies the repeater. The transmitter transmits the identification information list to the sender device through the first content protection technology.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: A communication device includes: a first communication module configured to perform a first communication with a counterpart communication device using a first set of communication lines; a second communication module configured to confirm with the counterpart communication device using a second set of communication lines whether the counterpart communication device is capable of establishing a second communication; a storage module configured to store information related to an extended communication capability provided in the counterpart communication device; and a controller configured to establish a third communication with the counterpart communication device based on the information stored in the storage module when the second communication module confirms that the counterpart communication device is capable of establishing the second communication.

Abstract: According to one embodiment, video image and voice signals are transmitted to a plurality of electronic devices each having at least one of a video image display function and a voice reproducing function. Information indicating the fact that at least one of a video image and a voice has been set in a mute state is acquired from each of the electronic devices. Based on the information, a processing operation is applied to the video image and voice signals supplied to each of the electronic devices.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: A repeater comprises an EDID memory to store a control data and a memory control unit. The memory control unit is configured to make access to the EDID memory to read the control data therefrom, store the read control data into the EDID memory and, when access is made to the EDID memory by the set-top box, transfer the control data stored in the EDID memory to the set-top box. In this case, the memory control unit outputs an inhibiting signal to a set-top box to inhibit it from making access to the EDID memory until the completion of an operation of storing the control data from the EDID memory in the set-top box into the EDID memory in the repeater.

Abstract: A data transmission apparatus includes: a communication interface including: a first communication interface receiving first signals transmitted through a communication line having a pair of first and second lines, the first signals being transmitted in opposite phase; and a second communication interface receiving second signals transmitted through the communication line, the second signals being transmitted through the first and second lines in same phase; a signal detector configured to detect an unbalanced signal that appears as one of: a first signal component in the second signals that are received by the second communication interface; and a second signal component in the first signals that are received by the first communication interface; and a notification module configured to notify an occurrence of an unbalance in the communication line when a level of the unbalanced signal detected by the signal detector is equal to or higher than a given value.

Abstract: The invention provides a data transmitting apparatus including: a data transmitting circuit (100) having a differential signal line through which a differential signal is transmitted/received by a first line (161, 165) through which hot plug detection information of a communication line is transmitted, and a second line (162, 167) paired with the first line (161, 165), a hot plug-driving portion (158) for driving a signal on the first line (161, 165) so that a level of the signal is changed either to an L level or to an H level, and a differential communicating portion (168, 169) connected to the differential signal line for transmitting the differential signal, the differential communicating portion (168, 169) being operated in an operable range when the level of the signal on the first line (161, 165) is changed from the L level to the H level and from the H level to the L level by the hot plug driving portion; and a signal processing portion for executing signal processing for the differential signal which

Abstract: A content playback apparatus includes an SKF selecting unit that selects one segment key file from plural segment key files recorded in a DVD media at a time of playback of a content of the sequence key section, a data selecting unit that selects each content corresponding to a segment number of each key entry registered in the selected segment key file, a moving picture data decrypting unit that decrypts the selected moving picture data by a segment key corresponding to the segment number, and a decoder that plays back the decrypted moving picture data.

Abstract: According to one embodiment, an optical information recording medium includes pre-grooves with an irregular shape and lands each of which is sandwiched between the pre-grooves adjacent to each other, where the pre-grooves and lands are defined on an interface between a recording layer and a light reflection layer in a recording film, where the recording film includes a light reflectivity that enables reproduction with light of 650±5 nm, the recording layer includes a recording sensitivity with respect to light by a wavelength shorter than 650±5 nm, and a recording mark can be formed on the pre-groove by using light with a wavelength shorter than 650±5 nm.