Abstract:
In jumping reproduction, when an MPEG transport stream processed by the jumping reproduction is decoded and displayed, many noises occur in the video and the audio corresponding to the vicinity of the jumping. Provided are: a hard disk section 208 of reading and reproducing AV data recorded as an MPEG transport stream in a recording medium; and an AV transfer control block 211 of controlling the hard disk section 208 in such a manner that during the reproduction of the AV data, when the reproduction is performed with skipping a predetermined portion of the AV data, before the skipping of the predetermined portion, transport packets are outputted up to the last one among those constituting a frame, and that after the skipping of the predetermined portion, transport packets are outputted starting from the beginning transport packet of the next I frame.
Abstract:
There is a PSI receipt waiting time of two seconds or so from a start of decoding of an MPEG transport stream to actual display of AV data. There are provided first means of recording 3 for recording a predetermined signal discretely including additional information of a program; means of controlling records 2 for having said predetermined signal recorded by first means of recording 3; means of controlling reproduction 4 for having said predetermined signal reproduced from said first means of recording 3; means of detecting PSI 1 for detecting program specific information (PSI) from said predetermined signal; and means of adding PSI 5 for adding said PSI to said predetermined signal.
Abstract:
Continuous transfer of AV data without a break necessitates to perform replacement processing of a disk access unit and takes labor and time. A characteristic is that an HDD 2 is disposed which writes AV data in a recording medium, that an AV recording/reproducing controller 3 is disposed which, when there is a write error in writing of AV data in a disk access unit which is a minimum unit for continuously accessing the recording medium, controls the HDD 2 such that this disk access unit will be skipped and said AV data will be written in the next disk access unit, that skip processing judging means 5 is disposed, and that a replacement area is not formed in the recording medium.
Title translation:AUFZEICHNUNGSVORRICHTUNG,WIEDERGABEVORRICHTUNG,DATENVERARBEITUNGSVORRICHTUNG,AUFZEICHNUNGS- / WIEDERGABEVORRICHTUNG UNDDATENÜBERTRAGUNGSVORRICHTUNG
Abstract:
In the case that data such as AV data is recorded in a recording apparatus and/or in the case that data is reproduced by a reproduction apparatus, there is no concrete mechanism that protects copyright. An encryption means 11 for encrypting AV data sent from an interface 4, a control means 14 for controlling the encrypted AV data to be recorded and a recording means 15 controlled by the control means 14 for recording the encrypted AV data in a magnetic disk are provided such that the control means 14 controls the recorded data to be reproduced, the recording means 15 is controlled by the control means 14 so as to reproduce the data recorded on the disk and a decryption means 12 decrypts the reproduced data that is sent to the interface.
Abstract:
In order to obtain a data transfer rate required to record/reproduce audiovisual data, the present invention is intended to provide a file control apparatus capable of immediately carrying out recording without executing any garbage collection process immediately before recording audiovisual data, a method therefor, and a recording medium with recorded file control programs; the file control apparatus of the present invention comprises a means for generating a contiguous free area in a disk apparatus, a means for generating fixed files in the contiguous free area, a means for structuring a large-capacity volume file by connecting the plural fixed files, and a means for maintaining the file arrangement of the fixed files at the time of the recording or renewal of the data of the fixed files.
Abstract:
The problem to be solved is that once copyright claimed AV data is passed to application software, the application software can freely process the AV data for recording, etc., defeating the purpose of copyright protection. The invention provides a computer which comprises a system section 12 and an application software section 13, and which takes in copyright claimed, encrypted data via a digital interface 1 for processing therein, wherein the system section 12 judges that the application software section 13 is legitimate application software for the protection of copyright, and if the application software is a legitimate one, the system section 12 passes a key for the encrypted data to the application software section 13.
Abstract:
A virtual RAM read address generating circuit (41) generates a virtual address on the basis of an output signal of a crystal oscillation circuit (36). A phase comparison circuit (39) which performs phase comparison with a write address, and a spindle control circuit (3) which controls rotation of a disk with reference to outputs of a frequency comparison circuit (38) and the phase comparison circuit (39) are disposed. Therefore, a phase error can be fed back to a spindle motor, thereby preventing linear velocity deviation from occurring in a steady state. By using the thus configured reproducing device, the reproduction quality in the case where a disk wherein recording was performed by the CLV system is reproduced by the variable linear velocity reproduction system is ensured, and both high-speed access and low power consumption are realized.
Abstract:
A reproducing device for disk is provided with a phase comparator circuit (39) which compares the phase of a virtual address generated by a virtual RAM read address generating circuit (41) based on the output signal of a crystal oscillation circuit (36) with that of a write address, and a spindle control circuit (3) which controls the rotation of a disk while referring to the outputs of a frequency comparator circuit (38) and the phase comparator circuit (39). Therefore, the phase error is fed back to a spindle motor, and the linear velocity does not vary in a steady state. When data recorded on a disk by the CLV system are reproduced by such a reproducing device by the variable linear velocity reproducing system, the quality of the reproduced data is ensured and both the access speed and power consumption are improved.
Abstract:
When performing special playback while recording AV data at the same time, there are cases where the necessary frame rate cannot be secured. The invention discloses a recording apparatus equipped with a recording and playback means 7, 8, 9 capable of performing simultaneous recording and playback, allowing recorded image data to be played back in special playback mode while simultaneously recording incoming image data, wherein the incoming image data is at least two or more kinds of data having different transfer rates, and when the recording and playback means 7, 8, 9 performs simultaneous recording and playback, the frame rate of the image data to be played back in special playback mode is changed according to the mode of the two or more kinds of incoming image data.
Abstract:
In a conventional hard disk apparatus, as the amount of data becomes large, just as in the case of AV data, the number of times a data reading or writing command is issued increases, and the overhead of an interface increases, whereby the usability of the CPU of a microcomputer increases. A hard disk apparatus in accordance with the present invention comprises a hard disk 5 of recording data, a hard disk controller 4 of controlling the hard disk 5, an IDE controller 103 of controlling the hard disk controller 4, and a command controller 102 of creating a command to be issued by the IDE controller 103 from a predetermined command used to reproduce or record data and transferring the command to the IDE controller 103.