摘要:
A multiplexing apparatus for multiplexing audio data into transport stream (TS) packets includes a first encoding section encoding the audio data by a first encoding method; a second encoding section encoding the audio data by a second encoding method, which is a variable-length encoding method and which differs from the first encoding method, for attaching a timing value indicating a timing used when audio data is decoded in units of predetermined audio data; a packetization section packetizing the audio data encoded by the first encoding section and the audio data encoded by the second encoding section into TS packets and for attaching the same ID to a plurality of packetized TS packets; a determination section determining a TS packet to be multiplexed from among the plurality of TS packets packetized by the packetization section; and a multiplexing section multiplexing the TS packet determined by the determination section.
摘要:
A block key to encrypt block data is generated using an ATS (arrival time stamp) appended to each of TS (transport stream) packets included in a transport stream correspondingly to the arrival time of the TS packet. The ATS is a random data depending upon an arrival time, and so a block-unique key can be generated, which enhances the protection against data cryptanalysis. A block key is generated from a combination of an ATS with a key unique to a device, recording medium or the like such as a master key, disc-unique key, title-unique key or the like. Since an ATS is used to generate a block key, any area for storage of an encryption key for each block may not be provided in a recording medium.
摘要:
A video information recording apparatus includes a first obtaining unit operable to obtain video information to be recorded; a second obtaining unit operable to obtain thumbnail picture information to be recorded in correspondence with the video information; an encrypting unit operable to encrypt the thumbnail picture information; and a recording unit operable to record the video information and the encrypted thumbnail picture information onto a recording medium.
摘要:
The present invention relates to an apparatus and a method for reproducing a recording medium that require input of a code number only once when the code number is required to be inputted to both a directory and a PlayList for reproduction. A plurality of directories such as DVR, DVR1, DVRn and the like are formed on a disk. One directory DVR has a flag DVR_protect_flag set therein for controlling reproduction of information belonging in the directory. Also, .rpls in PLAYLIST, which is one piece of information in the directory DVR, has a playback_control_flag set therein for controlling reproduction thereof. In a case where the DVR_protect_flag is 1, the reproduction is allowed only when a correct code number is inputted. In a case where the DVR_protect_flag and the playback_control_flag are both 1, input of the code number for the playback_control_flag is omitted when the correct code number has already been inputted for the DVR_protect_flag.
摘要:
A block key to encrypt block data is generated using an ATS (arrival time stamp) appended to each of TS (transport stream) packets included in a transport stream correspondingly to the arrival time of the TS packet. The ATS is a random data depending upon an arrival time, and so a block-unique key can be generated, which enhances the protection against data cryptanalysis. A block key is generated from a combination of an ATS with a key unique to a device, recording medium or the like such as a master key, disc-unique key, title-unique key or the like. Since an ATS is used to generate a block key, any area for storage of an encryption key for each block may not be provided in a recording medium.
摘要:
A multiplexing apparatus for multiplexing audio data into transport stream (TS) packets includes a first encoding section encoding the audio data by a first encoding method; a second encoding section encoding the audio data by a second encoding method, which is a variable-length encoding method and which differs from the first encoding method, for attaching a timing value indicating a timing used when audio data is decoded in units of predetermined audio data; a packetization section packetizing the audio data encoded by the first encoding section and the audio data encoded by the second encoding section into TS packets and for attaching the same ID to a plurality of packetized TS packets; a determination section determining a TS packet to be multiplexed from among the plurality of TS packets packetized by the packetization section; and a multiplexing section multiplexing the TS packet determined by the determination section.
摘要:
A multiplexing apparatus for multiplexing audio data into transport stream (TS) packets includes a first encoding section encoding the audio data by a first encoding method; a second encoding section encoding the audio data by a second encoding method, which is a variable-length encoding method and which differs from the first encoding method, for attaching a timing value indicating a timing used when audio data is decoded in units of predetermined audio data; a packetization section packetizing the audio data encoded by the first encoding section and the audio data encoded by the second encoding section into TS packets and for attaching the same ID to a plurality of packetized TS packets; a determination section determining a TS packet to be multiplexed from among the plurality of TS packets packetized by the packetization section; and a multiplexing section multiplexing the TS packet determined by the determination section.
摘要:
Control data subsequent to an extension start code is stored in an encoding apparatus when transmitted after each header data of a video sequence layer, a GOP layer, a picture layer and a slice layer. And in transmission of the next header data, the content of the control data subsequent to the extension start code in the header data to be transmitted is compared with the content of the preceding header data of the same layer stored in the encoding apparatus. And if the result of such comparison signifies that the compared data are mutually the same, neither the extension start code nor the subsequent control data is transmitted. At the reception of each header data of the video sequence layer, the GOP layer, the picture layer and the slice layer, the control data decoded subsequently to the extension start code is stored in the decoding apparatus. And when the extension start code is not existent in the next header data to be decoded, the preceding header data of the same layer stored in the decoding apparatus is duplicated and used as the control data of the layer being currently encoded.
摘要:
For a large capacity recording medium, a user interface having high flexibility and enriched representation is accomplished. A flag that represents whether a play item has a multiple angle structure of which the play item is reproduced with a plurality of angles is described. In addition, a flag that represents whether the beginning of each decode unit is an angle switchable point is described. In a seamless multiple angle structure, the current angle can be switched without need to increase the number of interleave units. In a nonseamless multiple angle structure, with the flag, in a predetermined region on the rear end side of each angle, the current angle is prohibited from being switched. Thus, when a play item exits from the multiple angle, discontinuity in the reproduction can be prevented. In addition, with a flag that represents whether a sub play item should be reproduced not in synchronization with a main path, the sub play item of only audio data can be used as a BGM.
摘要:
A data processing apparatus receives files reproduced from a recording medium, the recording medium having recorded thereon an AV stream file and a PlayList file specifying a method of reproducing the AV stream file. The PlayList file is received. The received PlayList file and additional information associated with the PlayList file are recorded to a management information file for managing the PlayList file.