Kabushiki Kaisha Toshiba

Toshiba Corporation

Hitachi Maxell, Limited

Hitachi Consumer Electronics Co., Ltd.

Masahiko Mawatari

Makoto Sato

Nobuaki Suzuki

Takashi Doi

Yutaka Kawada

Takanobu Mukaide

Nobuaki Kabuto

Seiichi Tanaka

Hideki Ohkita

Yuji Nagai

Taku Kato

Naoki Matsuda

Yutaka Kashihara

Tatsuyuki Matsushita

Atsushi Ishihara

Hiroshi Isozaki

Seiichi Nakamura

Tooru Kamibayashi

Takashi Koga

Kosuke Haruki

Yoshikata Tobita

Masatoshi Sumiyoshi

Tatsuyuki Ohno

One embodiment provides a communication device for transmitting a video to an external device through first to third transmission lines, the communication device including: a transmission module configured to transit first color difference information and second color difference information concerned with adjacent two pixels through the first transmission line, to transmit first luminance information concerned with one of the two pixels through the second transmission line, and to transmit second luminance information concerned with the other of the two pixels through the third transmission line.

Communication device and communication method

One embodiment provides a communication device for transmitting a video to an external device through first to third transmission lines, the communication device including: a transmission module configured to transmit first color difference information and second color difference information concerned with adjacent two pixels through the first transmission line, to transmit first luminance information concerned with one of the two pixels through the second transmission line, and to transmit second luminance information concerned with the other of the two pixels through the third transmission line.

The present invention relates to system and method of reading and rewriting EDID in a video transmission system includes a transmitter transmitting a video signal and a receiver receiving the video signal that the transmitter transmitted which are connected to each other through digital interface, the method includes a reading step where the transmitter reads the EDID of the receiver through the digital interface; a first transmitting step where the transmitter transmit the video signal to the receiver on the basis of the EDID which the transmitter read; a second transmitting step where the receiver transmits a first message related to the EDID of the receiver; and a third transmitting step where the receiver transmits a second message related to the EDID of the receiver; wherein the transmitter, which received the first message from the receiver, does not read the EDID of the receiver until the second message is received.

System and method for transmitting a video signal from a transmitter to a receiver and reading and writing EDID

A device includes a transmitter that transmits, via an interface comprising first, second, and third transmission channels, video data having a 4:1:1 format to a display device. 4:1:1 represents a ratio of a sampling frequencies of a brightness component, to a first color difference component, to a second color difference component. The first and second color difference components of one pixel in a first horizontal line of a first frame of the video data are allocated and transmitted within two clock cycles of the first transmission channel. Brightness components of four pixels in the first horizontal line are allocated and transmitted within two clock cycles of the second and third transmission channels. The transmitter transmits the video data for all of the pixels of the first horizontal line, and thereafter, sets pixels in a second horizontal line as a target to be transmitted.

Video transmission device, video display device, and video transmission method

According to one embodiment, a signal transmission apparatus being AC-coupled with a receiving apparatus through a digital transmission line includes a transmitting module configured to transmit a differential signal based on an encoded bit serial input signal such that a low frequency component of the differential signal to be transmitted is maintained at a constant level when the differential signal based on the encoded bit serial input signal is transmitted to the digital transmission line where the encoded bit serial input signal includes a ratio of the number of logic 1 to the number of logic 0 which is different from 5:5.

Signal transmission apparatus and signal transmission method

According to one embodiment, a transmitter including an AV transmission unit including a first transmission unit which transmits video/audio data according to a method 1, and a second transmission unit which transmits video/audio data according to a method 2, with a clock signal inserted in a data signal, and a communication unit which performs the information communication with the receiver by a predetermined standard signal, a communication channel switch unit which transfers a video clock signal to a clock terminal of an HDMI if the video/audio data is transmitted by the first transmission unit, or transfers a first predetermined standard signal output from the communication unit if the video/audio data is transmitted by the second transmission unit, while the communication channel switch unit transfers a second predetermined standard signal received by an HPD/RSV terminal of the HDMI even in transmission by any of the first and second transmission units.

Transmitter, receiver, and communication path switch method

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.

Audiovisual (AV) device and control method thereof

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.

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.

Growing community of inventors

Yokohama, Japan

Masahiko Mawatari