Notes

All digital input audio sign sources are linked to primary MPU 30. This is done to make use of such signals in the “audio synchronization process” to be described later. Of the execution outcomes of primary MPU 30, the contents that the DVD video recorder consumer is informed of are displayed on a display unit of the DVD video recorder, or are displayed on a monitor display in an on-screen show mode. Main MPU 30 features a ROM written with management packages and the like, a RAM that provides a piece area required for executing a program, an audio information synchronization processor, a phone I/F or Internet I/F, and the like. As within the above example, when formula or can't be glad, some cells are moved , thus reducing the entry frequency.
The transmission fee of the video info sent from optical head 202 to buffer 219 might be referred to as a physical transmission rate hereinafter. Also, wd elements not detected of the transmission price of the video information externally transferred from buffer memory 219 is known as a system transmission fee . In common, bodily and system transmission rates PTR and STR assume completely different values. As the recording progresses, disc drive 32 returns address info utilized in recording to major MPU 30.
toshiba external usb 3.0 usb device not recognized , as shown in audio synchronization flags #1, #2, . 9, a flag indicating whether or not or not audio synchronization information is recorded is about for every audio stream number, and when the audio synchronization knowledge is to be recorded , the number of audio samples of each VOBU is expressed by 2 bytes in the audio synchronization data in FIG. An MPU in disc drive 32 reads out sector data from disc 10 in accordance with the received command, and information processor 36 makes error correction of the readout information and sends the info to decoder 60 in the type of pack data. Main MPU 30 then sends the beforehand determined tackle of playback knowledge and a read command to disc drive 32. Audio encoder fifty four has a function of changing the enter digital audio sign into a digital signal compressed at a fixed bit fee by MPEG or AC-3. A digital video sign including this visible menu as wanted is output exterior the equipment shown in FIG.
21 is a schematic view of a recording system for explaining continuity of a recording signal. 15 is a schematic view of a playback system for explaining continuity of a playback signal. 10 is a view that exemplifies the hierarchical structure of knowledge included in management information DA21 shown in FIG.
As a outcome, upon rewriting knowledge later, information could be overwritten in models of ECC blocks (ECC needn't be re-encoded). In addition, when the AV handle makes use of an ECC block made up of sixteen sectors as a unit, handle management is straightforward even when overwrite is made after video recording. Since this overwrite is made irrespective of VOBU#g who knowledge has not changed, playback of data of VOBU#g never fails as a result of rewrite of the info change space. Problems posed when the position of a sector as a minimum unit of tackle has deviated from that of video object unit VOBU shown in FIG.
As a consequence, a continuous recording course of in NTSC video recording that requires a frame fee of 30 frames per sec is disturbed. Assume that a recording data cluster, which pertains to a single cell in the structure order of ECC blocks that can be used is one cell information set . In this case, particular cell #1 is considered as one cell data set until it is divided by another cell #2.
When the time map information (TMAPI in FIG. 31) is on the market, even when the user has modified the playback order using user-defined PGC info to be completely different from an authentic one, the VOBU from which playback is to begin could be detected utilizing the VOBU entries in time map data TMAPI. By rewriting the user-defined PGC data without re-recording information whereas altering the preliminary recording order, video playback may be made in an arbitrary order. That is, the begin place (I-picture begin time) of the “GOP completed by correction” can be specified utilizing “I-picture audio position” info within the audio synchronization information in FIG. More specifically, the place of particular info such because the audio gap could be detected by exploiting the contents of the audio synchronization data shown in FIG. The consumer can access the recorded sources of DVD video, DVD video ROM, DVD audio, and laptop information as if she or he were working a private laptop, while observing a menu display or window show display screen displayed with the listing structure proven in FIG. The VOBU basic information included in cell VOBU desk #m in FIG.
Details of cell time search info (CTI #m) will be defined later close to FIG. Allocation map table AMT consists of info that pertains to deal with setups along the precise data allocation, identification of recorded/unrecorded areas, and the like on the data storage medium . In the instance proven in FIG. four, allocation map desk AMT includes user space allocation descriptor UAD, spare space allocation descriptor SAD, and tackle conversion desk ACT. A DVD digital video recorder could be designed to attain write many/read many (read/write) for a DVD-RAM disc (or DVD-RW disc), write once/read many for a DVD-R disc, and skim many for a DVD-ROM disc. When optical disc 10 is a write-once DVD-R, a polycarbonate substrate is used, gold can be utilized as a mirrored image layer , and an ultraviolet setting resin can be used as a protection layer .
Since the VOBU measurement is introduced in models of sectors, as described above, VOBUs could be accessed utilizing addresses in units of sectors. The recorded contents of knowledge space DA correspond to those shown in FIG. four that has already been explained. C) even when multi-channel audio data of, e.g., AC-3 is re-arranged or mix-down edit from digital sources having totally different sampling frequencies is done, synchronization among channels could be assured. In order to forestall such error, within the current invention, the variety of audio samples in units of VOBUs for the digitally dubbed audio info can be recorded as an option in the management space (control information DA21 in FIG. 4).
By setting the aforementioned AV address, video info in a plurality of DVD-ROM and/or DVD-RAM discs inserted right into a a quantity of disc pack (disc changer 100 in FIG. 27) could be loaded as a half of an AV file. At the beginning of switch of those packet knowledge, presentation time stamp PTS is loaded to STC 38. After that, the respective decoders in decoder 60 execute playback processes in synchronism with the PTS worth in packet data , thus displaying a shifting image with audio and superimposed dialog on a TV monitor . Similarly, ADC fifty two converts the enter analog audio signal into a digital signal at a sampling frequency of, e.g., forty eight kHz and sixteen quantization bits.
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