摘要:
Main data and a sub code supplied from input terminals 1a and 1b are processed by encoders 2a and 2b, respectively. The encoded main data and sub code are supplied to an EFM modulating portion 4 through a multiplexer 3. The EFM modulating portion 4 is composed of an 8-14 converting portion 5a and a connection bit selecting portion 5b. For the EFM modulating portion 4, a DSV normal controlling portion 7a and a DSV special controlling portion 7b are disposed. In only a predetermined region designated on an optical disc, the DSV special control is performed. The DSV special control causes the absolute value of the DSV to increase so that data will be prevented from being normally reproduced. The normal control causes the absolute value of the DSV to converge at 0. When data is reproduced from the optical disc, if the reproduction state of the predetermined region is abnormal, it is determined that the disc is an original disc. An encryption key can be recorded in the predetermined region.
摘要:
An optical recording medium having plural recording layers includes a first recording layer on which first data is to be recorded and a second recording layer on which second data is to be recorded. The first and second recording layers are layered, with the second data being recorded at a location in the second recording layer in the vicinity of a location in the first recording layer where the first data relevant to the second data is recorded. Replay signals of variable configurations can be obtained by suitably synthesizing data read out from the respective recording layers.
摘要:
An information distributing apparatus and method wherein value standards of content information to be distributed to a user exhibit different usage values distinguished by a trait of the content information and selectable by the user. Billing for receipt of the information is based on the value standards, and the content, standards and billing information are distributed to the user.
摘要:
Data broadcast data, which is broadcast in data broadcasts, is constructed by disposing, for example, EMD (Electric Music Distribution) links required to acquire song data as actual broadcast data, which is broadcast in actual broadcasts by a transmitting device, the actual broadcast data is transmitted, and the data broadcast data wherein the EMD links for the song data in the actual broadcasts are disposed, is transmitted periodically during the transmission of the actual broadcast data. The actual broadcast data and the data broadcast data are received by a user terminal, and the EMD links disposed in the data broadcast data are stored whenever there is an input of an operation to attach a “bookmark”. Thus, audio data such as songs in programs broadcast can easily be acquired by radio.
摘要:
Data areas AR1 and AR2, lead-in areas LIN1 and LIN2, and lead-out areas LOUT1 and LOUT2 are provided on a disc. For example, in case of encrypting and recording data into the data area AR2, copyright management information R2 and key information K2 are recorded into the lead-out area LOUT2. Only information in a Q channel of a subcode is recorded in the lead-out area and this area is filled with dummy data. A position of the lead-out is obtained from TOC information. The fact that a light spot has entered the lead-out area can be judged from the information in the Q channel. The copyright management information and key information are recorded by using the lead-out area. The lead-out area is not rewritten or accessed by an ordinary CD player, so that the copyright management information and the key information can be safely held.
摘要:
A method for processing content data includes the steps of, when content data is transmitted from a data provider, adding usage rule information prescribing a rule of usage of the content data to the content data and transmitting the content data with the usage rule information; receiving the transmitted content data; extracting the usage rule information from the received content data; and notifying a user of the content data of the extracted usage information.
摘要:
Reproduction data is supplied to a decoder and encryption is decoded. A reproducing conditions label is detected by a reproducing conditions label detecting unit. Compression encoding is decoded by a decompressor. A watermark detecting unit discriminates whether the reproducing conditions label has been falsified or not. In a listening right counter, each time the reproduction data is decoded, listening right data is changed. The listening right data transmitted from a prepaid data charger by an antenna and a communicating module is stored into a memory unit. An encrypting module and a decoding module are provided in the communicating module. In a watermark adding unit, a watermark is added to output data. The data is converted into an analog output by a D/A converter and outputted to the outside.
摘要:
A recording medium having an area in which data that has been encoded with a first error correction code is recorded, wherein data that can be decoded with a second error correction code that is different from the first error correction code is recorded to the area along with the data that has been encoded with the first error correction code, and wherein the data that can be decoded with the second error correction code composes at least part of encryption key data.
摘要:
When encoded data is divided every predetermined length, a header is added, the data is packetized, a header is further added to thereby form pack data, and the data is recorded onto a recording medium which is divided into sectors and can be accessed on said sector unit basis, encode units are stuffed and recorded into each packet and a position of a complete encode unit existing at the head of the sector is indicated by a pointer. If the pointer is used, the position of the encode unit serving as a complete encode unit is known, so that the decoding can be immediately started from the head of the encode unit. A length up to the head of the complete encode unit can be specified by the sector number if the encode unit is determined by a fixed length.
摘要:
A system control circuit 5 determines whether or not an external apparatus connected to an interface 14 is one that can store data, by transmitting data to the apparatus through the interface 14. It the system control circuit 5 determines that the external apparatus can store data, the circuit 5 turns off a switch 13, stopping the transmission of audio data to the external apparatus through the interface 14. As a result, illegal copying of the data can be effectively prevented.