Abstract: A data player for reading contents encrypted by a decoding key from a digital medium, and playing the encrypted contents by using the decoding key which is stored in a key storage unit, comprises: a key obtaining unit for performing mutual authentication with the key storage unit to obtain the decoding key stored in the key storage unit; a key holding unit for holding the decoding key; a playback state obtaining unit for monitoring the playback state of the digital medium; and a contents decoding unit for decoding the encrypted contents by using the decoding key. The decoding key is obtained by the key obtaining unit and stored in the key holding unit, and the encrypted contents read from the digital medium is decoded with the decoding key by the contents decoding unit to play the contents. The decoding key stored in the key holding unit is discarded according to the playback state of the digital medium which is obtained by the playback state obtaining unit.

Abstract: A data player for reading contents encrypted by a decoding key from a digital medium, and playing the encrypted contents by using the decoding key which is stored in a key storage unit, comprises: a key obtaining unit for performing mutual authentication with the key storage unit to obtain the decoding key stored in the key storage unit; a key holding unit for holding the decoding key; a playback state obtaining unit for monitoring the playback state of the digital medium; and a contents decoding unit for decoding the encrypted contents by using the decoding key. The decoding key is obtained by the key obtaining unit and stored in the key holding unit, and the encrypted contents read from the digital medium is decoded with the decoding key by the contents decoding unit to play the contents. The decoding key stored in the key holding unit is discarded according to the playback state of the digital medium which is obtained by the playback state obtaining unit.

Abstract: A data player for reading contents encrypted by a decoding key from a digital medium, and playing the encrypted contents by using the decoding key which is stored in a key storage unit, comprises: a key obtaining unit for performing mutual authentication with the key storage unit to obtain the decoding key stored in the key storage unit; a key holding unit for holding the decoding key; a playback state obtaining unit for monitoring the playback state of the digital medium; and a contents decoding unit for decoding the encrypted contents by using the decoding key. The decoding key is obtained by the key obtaining unit and stored in the key holding unit, and the encrypted contents read from the digital medium is decoded with the decoding key by the contents decoding unit to play the contents. The decoding key stored in the key holding unit is discarded according to the playback state of the digital medium which is obtained by the playback state obtaining unit.

Abstract: A data player for reading contents encrypted by a decoding key from a digital medium, and playing the encrypted contents by using the decoding key which is stored in a key storage unit, comprises: a key obtaining unit for performing mutual authentication with the key storage unit to obtain the decoding key stored in the key storage unit; a key holding unit for holding the decoding key; a playback state obtaining unit for monitoring the playback state of the digital medium; and a contents decoding unit for decoding the encrypted contents by using the decoding key. The decoding key is obtained by the key obtaining unit and stored in the key holding unit, and the encrypted contents read from the digital medium is decoded with the decoding key by the contents decoding unit to play the contents. The decoding key stored in the key holding unit is discarded according to the playback state of the digital medium which is obtained by the playback state obtaining unit.

Abstract: An on-vehicle recording/reproduction apparatus (700) of a data transmission/reception system includes: an extraction unit (502) which compares a database file (710) with a received database file (610) and extracts information regarding audio data recorded in a home recording/reproduction apparatus (600) but not recorded in the on-vehicle recording/reproduction apparatus (700); a sending unit which sends the audio data that is recorded in the on-vehicle recording/reproduction apparatus (700) but not recorded in the home recording/reproduction apparatus (600) and which is extracted by the extraction unit (502) to the home recording/reproduction apparatus (600); a delete determination unit (701) which determines whether to copy a song to the home recording/reproduction apparatus (600) or to delete the song from the recording unit (101) of the on-vehicle recording/reproduction apparatus (700) itself, by checking items “copy origin,” “copy destination,” and “priority level” in the database file (710).

Abstract: A transmission system includes a transmission apparatus and a receiving apparatus for repeatedly transmitting and receiving a frame with plural time slots at a constant frequency, in which digital audio data of plural channels and auxiliary data required to playback the digital audio data are transmitted using previously allocated time slots. A multiplexer is provided for multiplexing, assuming an area made up of previously allocated time slots that are included in respective frames amounting to a number of a multiple of n as block data when the predetermined encryption unit is n bytes. The digital audio data and the auxiliary data are allocated as the block data wherein the auxiliary data is allocated to the time slots that are located at the same positions of respective plural frames within the block data, and the digital audio data is allocated in the time slots that are located at the same position in the respective frames amounting to the number of a multiple of n in the block data.

Abstract: A data player for reading contents encrypted by a decoding key from a digital medium, and playing the encrypted contents by using the decoding key which is stored in a key storage unit, comprises: a key obtaining unit for performing mutual authentication with the key storage unit to obtain the decoding key stored in the key storage unit; a key holding unit for holding the decoding key; a playback state obtaining unit for monitoring the playback state of the digital medium; and a contents decoding unit for decoding the encrypted contents by using the decoding key. The decoding key is obtained by the key obtaining unit and stored in the key holding unit, and the encrypted contents read from the digital medium is decoded with the decoding key by the contents decoding unit to play the contents. The decoding key stored in the key holding unit is discarded according to the playback state of the digital medium which is obtained by the playback state obtaining unit.

Abstract: First through third light reception elements 111–113 receive infrared data D from an operation input transmission section 2, and output the received data to an operation input permission determination section 12a. The operation input permission determination section 12a distinguishes among the first through third infrared light reception elements 111–113, thereby determining in which space an operation input has been performed, and analyzes the description of the operation input, thereby determining whether to accept the operation input. A calculation processing section 13a performs various processes based on the description of the operation input from the operation input permission determination section 12a, a processing result of a position detection section 17, and map data stored in a map data storage section 16. A drawing processing section 14a performs a process of outputting a processing result of the calculation processing section 13a to first and second displays 3 and 4.

Abstract: A video display system for suppressing variations of a video image display position and improving viewing comfort includes: a projector (1100) which projects a video projection light; and a screen unit (1150) which receives the video projection light and displays the video image. The screen unit (1150) includes first and second light detection units (1161 and 1162) which detect the received video projection light. The projector (1100) includes a control unit (1205) and an adjustment unit (106) which derive displacement in the display position of the video image based on the light detection results of the first and second light detection units (1161 and 1162) and control the output mode of the video projection light so as to suppress the displacement.

Abstract: In a stream reception device, before the user operates an input section (15), a control section (12) uses locational information of each of n number of selected stream transmission stations (2) to generate and send a distribution request (R), which is data for requesting distribution of a stream (ST) stored in each of the stream transmission stations (2). Then, each stream (ST) is buffered in a stream storage section (14) sequentially from a reproduction start portion thereof. Then, in the case where a stream (ST) to be a target is stored, the control section (12) reads the target stream (ST) from the stream storage section (14), sequentially from the reproduction start portion thereof, and reproduces the target stream (ST), in response to an operation on the input section (15).

Abstract: A display system (100) is provided which includes two display devices (101a and 101b); a coupling section (102) for coupling the two display devices such that one display device can be displaced relative to the other display device; a detection section (111-114) for detecting a value by which a position of the one display device relative to the other display device can be identified; and a display control section (115) for generating an image to be displayed on each of the one and the other display devices, based on the position detected by the detection section. The one and the other display devices display their respective images generated by the display control section.

Abstract: In a display system, a projector is mounted inside a vehicle, and emits a light beam, which is generated based on an image signal, toward an opening formed at a portion near a rear end of the vehicle. An exterior screen is extendable toward the opening and is made of a material having low stiffness. While being extended toward the opening, the exterior screen displays an image by allowing the light beam emitted by the projector to pass therethrough. A screen housing unit is mounted on or near one of a rear hatch and a back door of the vehicle for accommodating the exterior screen.

Abstract: A transmitter is capable of compressing an incoming image with a relatively small delay time and transmit the compressed image data to a receiver. Image data contains at least i pixel values of pixels arranged in line along a single direction, each pixel value being expressed in n bits. A transmitter for compressing such image data and transmitting the image data to a receiver via a transmission path includes a blocking section, a data compression section, and a data sending section. The blocking section takes every p pixel values among the i pixel values in the image data to form a data block, and sequentially outputs a plurality of the data blocks each including the p pixel values. The data compression section reduces an amount of data from each data block outputted from the blocking section and thereby outputs a compressed block. The data sending section sends the compressed block outputted from the data compression section onto the transmission path.

Abstract: A control device determines whether an image generated by merging several concurrently picked-up images has consistent image quality on a display device. If determined No, image quality parameters set in each image pickup device are so controlled as to make the image quality of the merged image consistent. Therefore, the merged image can assuredly have consistent image quality. Further, a signal processing device detects, based on positions of nodes and attributes of cameras, a connection indicating which node is connected to which camera and with what attribute. The signal processing device in advance stores every detectable connection and a plurality of image processing programs corresponding to each connection, and selects and carries out one of the image processing programs corresponding to the detected connection.

Abstract: A cryptographic apparatus reads, from a portable storage medium, content data and cryptographic information specifying a certain part of the content data on which cryptographic processing is to be performed, specifies the certain part in the read content data based on the read cryptographic information, and performs one of encryption and decryption on the certain part. When, for example, the content data is formed from alternating headers and variable-length data sections, the cryptographic information is a program formed from an instruction sequence. The instruction sequence has the cryptographic apparatus detect a header in the content data, read the length of the variable-length data, and perform cryptographic processing on a part of the content data between a start point and an end point, the start point being a position relative to the header position, and the end point being a value resulting from adding the length to the start point.

Abstract: There is provided a method for producing a metal/ceramic bonding circuit board, which can form a fine pattern even if a circuit forming metal plate is thick and which can shorten the time required to carry out etching, when a molten metal is caused to contact to a ceramic substrate to be cooled and solidified to bond the circuit forming metal plate to the ceramic substrate to etch the circuit forming metal plate to form a metal circuit plate having a desired circuit pattern. After a molten metal is caused to contact both sides of a ceramic substrate 10 to be cooled and solidified. Thus, a circuit forming metal plate 12 having a shape similar to a desired circuit pattern is bonded to one side of the ceramic substrate 10, and a metal base plate 14 is bonded to the other side thereof. Then, etching resists 16 are printed on the circuit forming metal plate 12 to etch the circuit forming metal plate 12 to form metal circuit plates 12 having the desired circuit pattern.

Abstract: The video displaying system for enabling a user to view the video more easily by enlarging the display size of the video without narrowing the space of a car in which a front seat 1A and a rear seat 1B are set comprises a projector 100A, which is placed around the lower part of the front seat 1A, for projecting the light for showing the video, a mirror 10A for reflecting the light that is projected from the projector 100 and a screen 20, which is set on the front seat 1A, for displaying the video after receiving the light that is reflected on the mirror 10A.

Abstract: An image displaying apparatus includes a projector unit mounted on an automotive vehicle to project an image; a display screen mounted on the automotive vehicle to display the image projected from the projector unit; an operation icon projected on one assigned area of the display screen by the projector unit; and a controller for controlling the projector unit by producing an operation signal in correlation with the operation icon to the projector unit when the operation icon is selected. The image displaying apparatus thus constructed can facilitate the operation of the projector with no need for a special remote controlling unit and an operation panel.

Abstract: Stream data and a command outputted from a drive device (101)are individually packetized in a first packet processing unit (102a). The stream data packet and the command packet are further multiplexed, and the multiplexed data is transmitted to a transmission path (104) using a synchronous channel. When the command outputted from a decoding unit (105) is packetized in a second packet processing unit (102b), it is packetized by multiplexing flow control information outputted from the decoding unit (105) on it, and transmitted to the first packet processing unit (102a) using a synchronous channel of the transmission path (104), and based on this flow control information, reading from and writing in the drive device (101) is controlled.

Abstract: First through third light reception elements 111-113 receive infrared data D from an operation input transmission section 2, and output the received data to an operation input permission determination section 12a. The operation input permission determination section 12a distinguishes among the first through third infrared light reception elements 111-113, thereby determining in which space an operation input has been performed, and analyzes the description of the operation input, thereby determining whether to accept the operation input. A calculation processing section 13a performs various processes based on the description of the operation input from the operation input permission determination section 12a, a processing result of a position detection section 17, and map data stored in a map data storage section 16. A drawing processing section 14a performs a process of outputting a processing result of the calculation processing section 13a to first and second displays 3 and 4.