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 is disposed which writes AV data in a recording medium, that an AV recording/reproducing controller 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 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 is disposed, and that a replacement area is not formed in the recording medium.

Abstract: Alternation processes reduce the recording and reproducing speed of a hard disk apparatus. A hard disk apparatus comprising: an HDD 10 for recording AV data onto a hard disk; and stream controlling means 8 which is connected to the HDD 10 and thereby processes the signal of AV data transmitted from an IEEE1394 I/F 7 or the signal of AV data transmitted to the IEEE1394 I/F 7; whereby the hard disk apparatus can record and/or reproduce the AV data, wherein when AV data transfer is not normally completed for a disk access unit which is a minimum continuous unit in the access to the hard disk, an alternation process on a disk access unit basis is carried out so that another disk access unit is used hereafter in place of that disk access unit.

Abstract: A reproduced image transmission apparatus which can display reversely reproduced images normally even when the transfer order of asynchronous transfer and isochronous transfer is not ensured on IEEE1394, in cases where an apparatus for generating the reversely reproduced images and an apparatus for decoding the reversely reproducing images are connected with each other via an IEEE1394 network. An MPEG transport stream processing means 15 embeds control signal for controlling decoding in an MPEG picture, and transmits the signal together with the MPEG picture through the IEEE1394 network in the isochronous transfer mode, whereby the synchronization between the MPEG picture and its control signal is surely obtained, thereby to generate reversely reproduced images according to MPEG using P and B pictures.

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 for recording a predetermined signal discretely including additional information of a program; means of controlling records for having said predetermined signal recorded by first means of recording; means of controlling reproduction for having said predetermined signal reproduced from said first means of recording; means of detecting PSI for detecting program specific information (PSI) from said predetermined signal; and means of adding PSI for adding said PSI to said predetermined signal.

Abstract: A multichannel display data generating apparatus displays AV data on a plurality of screens. A channel displayed on one of the screens is displayed without a program clock reference.

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: An encryptor is provided for encrypting AV data sent from an interface. A controller controls recording of the encrypted AV data by controlling a recorder for recording the encrypted AV data in a magnetic disk. The recorder is controlled by the controller so as to reproduce the data recorded on the disk. A decrypter decrypts the reproduced data that is sent to the interface.

Abstract: An encryptor is provided for encrypting AV data sent from an interface. A controller controls recording of the encrypted AV data by controlling a recorder for recording the encrypted AV data in a magnetic disk. The recorder is controlled by the controller so as to reproduce the data recorded on the disk. A decrypter decrypts the reproduced data that is sent to the interface.

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: 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: In a multimedia information sharing system, multimedia information is shared between multiple devices over a network to which a server is connected. The server includes: a management table for managing identifiers to identify terminal devices and the addresses of the devices on the network; a server receiving section receiving the identifier from a first terminal device; a processing section for getting the address of the first terminal device by reference to the identifier received and the address of a second terminal device, identified by another identifier received, by reference to the identifier and the management table; and a server transmitting section for sending the address of the second terminal device to the first terminal device if the first terminal device retains the multimedia information and sending the address of the first terminal device to the second terminal device if the second terminal device retains the multimedia information.

Abstract: A multichannel display data generating apparatus for generating data for displaying AV data on a multiscreen has a plurality of screens for displaying AV data of a plurality of channels, said apparatus comprising: input means for inputting AV data of a plurality of channels being transferred using a transport packet of a transport stream; a smaller number of PCR extracting means for extracting in a time-sharing mode the PCR of a plurality of channels displayed on said plurality of screens than the number of said plurality of screens; the same number of PLL means for establishing PLL synchronization by using said extracted PCR as the number of said plurality of screens; the same number of STC (system time clock) counter means for counting the times of the channels displayed on said plurality of screens by using the oscillation frequency of said PLL means as the number of said plurality of screens; AV decoding means for AV-decoding the AV data of the channels displayed on said multiscreen in AV synchronization

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.

Abstract: Continuous transfer of AV data without a break necessitates to perform replacement processing of a disk access unit and takes labor and time.

Abstract: Alternation processes reduce the recording and reproducing speed of a hard disk apparatus.

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.

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.

Abstract: A recording and reproducing apparatus is characterized in that said apparatus has: inputting means for receiving a packet data which is based on IEEE 1394, and in which signal information for indicating copy right information of an AV data (hereinafter, referred to as EMI) is provided in a header of a packet according to IEEE 1394; and recording and reproducing means for recording and reproducing an AV data and the EMI which are held in the packet data received by said inputting means. Four kinds of EMI are used, and, when an AV data indicating allowance “copy one generation” among them is to be recorded, said recording and reproducing means performs recording while rewriting the EMI to EMI indicating “no more copy.