Abstract: A client 2 includes a transmission unit 2d for transmitting the input speech information over a network to a server system 3 and an output unit 2b for receiving the contents selection information from the server system 3 over the network to output the received information. The server system 3 includes a prepared information storage unit 9b for memorizing one or more pieces of the preparation information pertinent to each contents, from one contents to another, and an information preparing server 7 for preparing the contents selection information based on the speech information received from the client 2 over the network and on the preparation information to send the so-prepared contents selection information to the client 3 over the network.

Abstract: An improvement in protecting information transmitted via a network from illegal copying is disclosed. While data input from an information provider via a network is stored in a storage device, an ID inherent in an information terminal unit stored in a ROM, the time information which is output from a real-time clock counter, an ID of the owner of an ID card read by a card reader are multiplex-recorded as identification information on the input data. Identification information is also multiplex-recorded on the data read from the storage device and to be output through the output terminal.

Abstract: In a data providing method and device thereof for providing data in a simple manner at a highly efficient transmission rate, first data of a configuration where information relating to a valid period of data is added to the data is made and provided, with the first data being categorized and stored in accordance with the information. Information for second data of the same configuration as the first data is then recognized and the first data is replaced with the second data in accordance with results of the recognition.

Abstract: In a data providing method and device thereof for providing data in a simple manner at a highly efficient transmission rate, first data of a configuration where information relating to a valid period of data is added to the data is made and provided, with the first data being categorized and stored in accordance with the information. Information for second data of the same configuration as the first data is then recognized and the first data is replaced with the second data in accordance with results of the recognition.

Abstract: A method and apparatus for improving the efficiency of providing updated data over a transmission medium. Each data has associated information indicating the presence or absence of validity data. An absence of validity data indicates that the data does not need to be updated. The presence of validity data allows only that data which needs updating to be transferred on the transmission medium, thereby improving its performance.

Abstract: An improvement in protecting information transmitted via a network from illegal copying is disclosed. While data input from an information provider via a network is stored in a storage device, an ID inherent in an information terminal unit stored in a ROM, the time information which is output from a real-time clock counter, an ID of the owner of an ID card read by a card reader are multiplex-recorded as identification information on the input data. Identification information is also multiplex-recorded on the data read from the storage device and to be output through the output terminal.

Abstract: There is disclosed a method of digital signal transmission in which, for serially transmitting digital data of N channels, where N may for example be 16, 24 or 32, these data are serially and successively transmitted in groups of M, where M may for example be 2, 3 or 4, with each said group including data of K channels, where K may for example be 8, and in which a preamble with a pattern violating the rule of modulation for data transmission is provided, for example, at the foremost part of each such group, a data validity evaluation bit is added to the data of each such channel, and parity data is also provided to the totality of bits of each such group. A group address may also be provided to each such group for indicating its group number within the M groups.

Abstract: Described is a method for PCM signal recording in which, when single-channel or multichannel PCM signals are recorded so that one-channel PCM signals are recorded in plural recording tracks, the input PCM signals of one channel are correspondingly distributed to the plural recording tracks with at least one word as a unit, and in which the distributed plural signals are subjected to an encoding operation independently of one another and are recorded on the plural recording tracks. In distributing the input PCM signals by word units, word groups consisting of a predetermined number of consecutive words are sequentially distributed to the recording tracks, or plural consecutive words equal in number to the number of recording tracks are distributed to the tracks.

Abstract: An error correcting encoding and decoding system for transmission and reception of digital data is arranged for high error-correcting ability of both burst errors and random errors. In encoding apparatus a digital signal is processed as a plurality of word sequences. The words are interleaved into a different arranging order and are subjected to different relative amounts of delay. Then, first check words are generated to satisfy a parity detection matrix, such as a Reed-Solomon code matrix. After this, the resulting data words and first check words are again interleaved and are provided with respective different amounts of delay. Then, second check words are generated to satisfy a similar matrix. Finally, the first and second check words and the data words are interleaved prior to transmission.

Abstract: Successive data words are distributed to a plurality of respective channels to form successive data blocks, each data block being comprised of the data words in the plural channels. A first error correcting code is generated as a function of the words included in the data block, this first error correcting code being adapted for use in correcting at least one word which may be erroneous in the data block, as when the data block subsequently is received or reproduced. The data words included in the data block are selectively delayed, by different respective time delays, to form a time-interleaved data block comprised of time-interleaved data words. A second error correcting code is generated as a function of the words included in the time-interleaved data block, this second error correcting code being adapted for use in correcting at least one word which may be erroneous in the time-interleaved data block, as when the time-interleaved data block subsequently is received or reproduced.

Abstract: A method and appratus are provided for communicating a sequence of digital information words. The information words are separated into a sequence of odd information words and a sequence of even information words. The separated odd and even information words are time-displaced from each other by a predetermined amount. The odd information words are encoded in an error-correcting code, and the even information words are separately encoded in a similar error-correcting code. The encoded time-displaced odd and even information words are combined into a transmission block, and this transmission block is transmitted or recorded. In one embodiment, the information words are encoded by generating an error-correcting word in response to the odd information words and by generating an error-correcting word in response to the even information words. The respective error-correcting words are interleaved with the odd and even information words.

Abstract: In a digital signal transmission system in which interleaved sequences of digital words are transmitted on respective channels, the words in each sequence are added bit-by-bit in a first modulo-two adder to produce a first parity signal, the latter and selected ones of the sequences of digital words have imparted thereto different respective delay times, and then the sequences of digital words and the first parity signal are added bit-by-bit in a second modulo-two adder to produce a second parity signal. The second parity signal is delayed a predetermined amount and fed back to the first modulo-two adder. Then, the interleaved sequences of digital words and the first and second parity signals are serially transmitted on a transmission medium, which can be a video tape. The transmission system is capable of correcting burst errors occurring in more than three successive digital words.

Abstract: In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to have different delay times to each other, and the signals thus delayed are again added bit by bit in a modulo-2 adder to produce a second parity signal. The predetermined number of words of information signals and first and second parity signals are serially transmitted through a transmission line.

Abstract: A PCM (pulse code modulation) signal transmission system processes sequentially transferred digital information words including two error correcting words consisting of a parity code word and a b-adjacent code word and adds them to the digital information words, time-interleaves each of the information words and its error correcting words in the block into time-interleave blocks distributed over a predetermined time, adds an error detecting code to at least one of the time-interleaved blocks, and transmits at least one time-interleaved block and error correcting code associated therewith. Method and apparatus for de-interleaving and error correction based on the three appended codes are included.

Abstract: Blocks of digital words containing an error correcting word are time interleaved into time-interleaved blocks of words, each of which contains no more than one word from any one of the original blocks. The time-interleaved blocks of words are converted to a bit-by-bit serial digital data stream which is time-base compressed to permit insertion therein of an error detecting code word and synchronizing signals. The resulting serial data stream may be recorded on a VTR. After reproduction, each time interleaved block is checked for errors and is then time de-interleaved to reconstruct the original blocks of digital words. If one or more errors exist in words in a time-interleaved block, no more than a single word in any one of the time de-interleaved blocks contains an error. Single-word errors in a reconstructed block are corrected using the error correcting word accompanying the reconstructed block.

Abstract: Groups of primary multi-bit digital signals arranged in digital words are spaced apart in sequence and are interleaved with related groups of secondary multi-bit digital signals, each of which is derived from, and encodes substantially the same information as, one of the primary signals. To minimize errors in processing signals, either the primary signals are delayed relative to the secondary signals, or vice versa, before they are interleaved. Cyclic redundancy check code signals are derived for each group of primary signals and each group of secondary signals and are interleaved in sequence with the primary and secondary signals. At a further stage in processing the signals, the checked code signals are analized and the related pairs of primary and secondary signals, which have been brought back into coincidence, are checked to determine whether one or both of the primary and the secondary signals of each related pair has been processed without error.

Abstract: Digital signals consisting of sets of simultaneous bits have an error-correcting signal encoded into them by adding an error-correcting bit to each set. The sets thus enlarged are referred to as digital words. The digital signals are then converted from simultaneous, or parallel, form to serial, or sequential, form and the digital words from a block of several digital signals at a time are interleaved in such a way that corresponding words from each of the digital signals in the same block are placed in immediate sequence. Prior to adding the error-correcting bits error-detecting bits can be added to the original bits in intersecting sets can that intersect the first-mentioned sets in row by column relationship, and parity bits can also be formed simultaneously with the formation of the error-correcting bits as extensions of the intersecting sets.

Abstract: A fluid flow control system has a fluid source and plural flow pipes connected to the fluid source. Each of the pipes has an opening of a specific area corresponding to one of the bit orders of a PCM (Pulse Code Modulated) input signal. The flow-condition of the fluid through each of the pipes is controlled by the PCM signal without changing the PCM signal to an analog signal. The summation of the outflow from each of the pipes combines to produce an analog flow output signal in response to the PCM input signal.

Abstract: A plurality l of data blocks, each comprised of at least two data words and a parity word associated bit for bit with the data words, together with an error correcting code word associated with each data and parity word, are transmitted in interleaved relation. L data words and associated error correcting code words followed by l parity words and associated error correcting code words and followed by l data words and associated error correcting code words, all transmitted in seriatim, are received and stored, and each error correcting word is decoded to ascertain the presence of an error in each received data or parity word.

Abstract: In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to have different delay times to each other, and the signals thus delayed are again added bit by bit in a modulo-2 adder to produce a second parity signal. The predetermined number of words of information signals and first and second parity signals are serially transmitted through a transmission line.