JP2004159231A - Digital coding information recording and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve difficulty in economically and effectively processing a plurality of information even though a plurality of information processing (typically mixing of AV series stream and data) are realized due to performance improvement of a disk media. <P>SOLUTION: The apparatus is selectively provided with a usage status determination means (13), a scheduling means (14), a transfer volume changing means (15), a schedule transfer volume changing means (16), an error processing changeable means (17), a coding rate information acquisition means (18), a buffer allocation means (19), the number of frames detection means (20), and a transfer processing ratio allotment means (21), etc. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention can simultaneously process digitally encoded AV streams (so-called digital broadcasting, streams used in digital storage media (DVDs and the like)) and data broadcasting (so-called BML) described in a script language or the like. The present invention relates to a possible recording / reproducing apparatus, and typically relates to an apparatus for recording / reproducing an AV stream and data using a disk medium.
[0002]
[Prior art]
Digital broadcasting has begun in Japan as well as in countries around the world. In digital broadcasting, in addition to ordinary television broadcasting, data accompanying a program such as a broadcasting schedule, data broadcasting, and the like are transmitted at the same time. In addition to the viewing services, users can be provided with advanced services.
[0003]
On the other hand, DVDs have also appeared as digital recording media following AV CDs as package media of AV systems other than broadcast systems. Further, with the development of digital encoding technology such as an MPEG encoder, a means for converting analog AV information into a digital code can be easily realized, and devices capable of self-recording / reproducing have appeared. Against this background, devices that record digitally encoded AV streams in a digital format have appeared. Conventionally, tape media has been widely used for AV-based recording devices in terms of recording capacity. However, the recording technology has been widely used due to the combination of encoding technology and improved recording density. I have.
[0004]
Disk media have excellent random access properties and are very difficult with tape media. Simultaneous recording / playback, recording / playback of multiple AV streams, AV stream and data (a typical example of the present invention is data Broadcast, etc.).
HDDs (hard disk drives) have the limitation of being fixed (non-replaceable), but in addition to their advantages in terms of storage capacity, and because of their excellent data transfer speed during recording and playback, they are built into digital broadcast receivers. Devices that improve the user's convenience by handling a plurality of streams and information at the same time, such as configuring the device in combination with other recording media (eg, DVD), have appeared.
[0005]
Although the present invention is applicable to all types of disk media, a conventional example of broadcast media is shown in FIG. 15 and will be briefly described. In the figure, a high frequency signal transmitted from a digital broadcasting station is input to a tuner (1) via an antenna (not shown). The tuner (1) selectively amplifies a predetermined band from the high-frequency signal, performs frequency conversion, and serves as an input to the demodulation unit (2). The demodulation unit (2) demodulates the modulated signal and converts it into digital data. The digital data is input to the AV stream data selection means (3), and the digital data is journalized for each packet ID to be reconfigured as AV stream data. In normal reception (viewing), the AV stream data is input to the decoding unit (4) along a path indicated by a broken line in the upper part of the figure. The decoding section decodes the encoded AV stream, converts the decoded AV stream into a projectable signal, and presents the signal to the viewer through the projecting means (5).
The above is the normal reception (viewing) operation. When performing recording and reproduction, the output from the AV stream data selection means (3) is transmitted via the AV stream data recording buffer (6) to the recording means ( Recorded in 7). Typical recording media include an HDD and a DVD, but the present invention does not limit the recording media including media that will appear in the future.
[0006]
In the reproduction operation, the reproduction stream is input from the recording means (7) to the decoding section (4) via the AV stream data reproduction buffer (8), and thereafter the projection means (5) is operated by the same operation as the normal reception operation. ) Is presented to the viewer.
[0007]
The data broadcasting process is performed in the lower part of FIG. The digital data of the demodulation unit (2) is input to the data broadcast data selection unit (9) as in the AV stream data selection unit (3). The data broadcast data selection means (9) selectively reconfigures the digital broadcast data by journaling the digital data for each packet ID. In a normal receiving (viewing) operation, the data broadcast data processing unit (10) converts the signal into a signal format that can be viewed by the user along the path indicated by the broken line, and then presents the converted signal to the projection unit (5).
[0008]
Recording and reproduction of the data broadcast are performed in the same manner as the AV stream, and are recorded in the recording means (7) via the data broadcast data recording buffer (11).
The same applies to the reproduction operation. The data read from the recording means (7) is converted into a signal format that can be viewed by the user in the data broadcast data processing unit (10) via the data broadcast data recording buffer (12). After the conversion, it is presented to the projection means (5).
[0009]
The above is the outline of the operation of the conventional example. The difference between the processing of the AV stream and the processing of the data broadcast data will be briefly described below. AV streams are required to have isochronous properties. In other words, a difference in processing speed between devices is not allowed, there must be no underrun of data, and particularly, buffer management of a read operation is important. On the other hand, for data broadcast contents, the processing speed generally depends on the device, and the time for data development and display depends on the device (model). Therefore, in an extreme example, the function can be realized by mounting a very small-capacity reproduction-side buffer. However, it goes without saying that the faster the processing, the better.
[0010]
[Problems to be solved by the invention]
As described above, a plurality of information processes (typically, a mixture of an AV stream and data) can be performed with the improvement in the performance of a disk medium. As described in the conventional example, a buffer is required in addition to the cache built in the (drive) and added to the processing device (circuit). As the buffer, a semiconductor storage device is often used for the purpose of matching the access timing of the disk medium with the timing of the processing device.
[0011]
Normally, it is necessary to provide a buffer for each processing system and ensure the maximum performance and capacity required for each processing system.However, in order to reduce the cost of equipment, if a device can be configured with a small-capacity buffer, If the benefits are great and the load on the processing processor involved in the data transfer process can be reduced, the ratio of the capacity allocated to the processing itself can be improved, and the processing speed can be improved or the equipment can be implemented using a low-cost processing processor. Can be reduced.
[0012]
In addition, when accessing the disk media, it takes a lot of time to determine the position on the disk media, move the head, etc. from issuing an access control command to receiving data. However, overhead occurs in portions other than the data transfer. In other words, it can be said that the larger the amount of data to be transferred at one time is as large as possible, the more the overhead is reduced and the better the access is, but on the other hand, the AV stream is isochronous. ) Is an indispensable requirement, so that the data transfer amount in the simultaneous processing cannot be increased without limit, and processing must be performed after satisfying the transfer requirements on the AV stream side.
[0013]
Normally, the buffer size, the transfer amount, and the transfer frequency are set so that the transfer of the maximum information amount (high-definition image program) of the AV stream does not break down. However, when handling a low-rate AV stream, Obviously, it is over-spec, and if the amount of information to be transferred at one time can be dynamically allocated, as in the case of the buffer size, optimization of buffer capacity, improvement of data broadcasting processing capability, and reduction of the performance requirements of the processing processor, etc. Can be made possible.
Also, in the case of a disk-type recording medium, a retry is performed when a read error occurs and a read error recovery is performed. However, since recovery is a dead time especially for isochronism, the number of times of recovery and the like depends on the processing content. If it is possible to control adaptively, it is possible to reduce the processing capacity devoted to data transfer, and to use that amount for improving the processing capacity of data broadcasting and the like.
[0014]
[Means for Solving the Problems]
Of the above-mentioned problems, regarding the problems according to claim 1, claim 2, claim 3, claim 7, claim 8, and claim 9, the user can select any one of the AV stream (normal TV program) and the data broadcast. It is equipped with a means for detecting and judging whether or not it is mainly used, and based on the information of the detecting and judging means, it is possible to adaptively change the transfer schedule of each data related to the simultaneous processing and the data transfer amount per time. The solution can be attained by providing the means described above.
According to the fourth and tenth aspects of the present invention, there is provided a device for detecting and determining whether a user mainly uses an AV stream or a data broadcast, and a recording device based on information of the detection and determination device. The problem can be solved by making it possible to adaptively perform processing when a read error occurs.
[0015]
According to the fifth and eleventh aspects of the present invention, a buffer size for reading stored AV data and a buffer size for reading data broadcast data are dynamically set based on encoding rate information of a digitally encoded AV stream. It is possible to solve the problem by making it possible to assign to the.
[0016]
Regarding the problems according to claims 6 and 12, when transferring an AV stream to a read buffer, the number of playback (decoding) screens (the number of frames) or a group unit of encoded frames (GOP; Group Of Picture) The above problem can be solved by providing the detecting means and dynamically assigning the ratio of the data broadcast data transfer and reproduction processing based on the number of frames or the number of GOPs.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
[0018]
FIGS. 1 to 7 are diagrams for explaining embodiments of claims 1, 2, 3, 3, 7, 8 and 9 of the present invention. 1, 3 and 5, a tuner (1), a demodulation unit (2), an AV stream data selection unit (3), a decoding unit (4), a projection unit (5), an AV stream data recording buffer ( 6), recording means (7), AV stream data reproduction buffer (8), data broadcast data selection means (9), data broadcast data processing section (10), data broadcast data recording buffer (11), data broadcast data The operation of the reproduction buffer (12) is the same as that of FIG. 15, and the operation is the same as that of the conventional example. Note that the tuner (1) is merely an example, and a unit for acquiring a signal from a disk medium such as a DVD may be added thereto.
[0019]
In FIGS. 1, 3, and 5, a use state determination means (13) is newly added as compared with the conventional example, and the state of the data transfer operation of the recording means (7) is made variable depending on the use state. Further, in the inventions described in claims 1 and 7, as shown in FIG. 1, a schedule means (14) is newly added as compared with the conventional example, so that the user can set the AV stream (normal). Which data (AV stream data or data broadcast data) is used at which time (in the AV stream data recording buffer (6) or data broadcast data) depending on which of the TV program) and the data broadcast is mainly used. A transfer schedule for deciding whether to transfer from the recording buffer (11) to the recording means (7) or from the recording means (7) to the AV stream data reproduction buffer (8) or the data broadcast data recording buffer (12). Control is possible. FIG. 2 is an operation flowchart according to the first and seventh aspects of the present invention. The operation will be described with reference to FIG. 2. The usage status of the AV stream and the data broadcast data is determined (step S100), and the data transfer schedule is adaptively varied according to the result of the usage status determination step S100 (step S101). ), The data is transferred according to the data transfer schedule determined in step S101 (step S102). According to the second and eighth aspects of the present invention, as shown in FIG. 3, a transfer amount variable means (15) is newly added as compared with the conventional example, and the user can use the AV stream (normally). TV program) or data broadcasting, the data is transferred from the AV stream data recording buffer (6) or the data broadcasting data recording buffer (11) to the recording means (7) or recorded. It is possible to control the amount of transferred data per transfer from the means (7) to the AV stream data reproduction buffer (8) or the data broadcast data reproduction buffer (12). FIG. 4 is an operation flowchart of the invention according to claims 2 and 8. The operation will be described with reference to FIG. 4. The usage status of the AV stream and the data broadcasting data is determined (step S200), and the data transfer amount per time is adaptively varied according to the result of the usage status determination step S200. (Step S201), data is transferred with the data transfer amount per one time determined in step S201 (step S202). According to the third and ninth aspects of the present invention, as shown in FIG. 5, a schedule transfer amount variable means (16) is newly added as compared with the conventional example, and the user can set the AV stream ( The transfer schedule and the amount of data transferred per transfer can be controlled depending on which of the TV program (a normal TV program) and the data broadcast is mainly used. FIG. 6 is an operation flowchart according to the third and ninth aspects of the present invention. The operation will be described with reference to FIG. 6. The usage status of the AV stream and the data broadcasting data is determined (step S300), and the data transfer schedule and the data transfer amount per time are determined according to the result of the usage status determination step S300. The data is adaptively changed (step S301), and the data is transferred according to the data transfer schedule and the data transfer amount determined at step S301 (step S302). Various modes are conceivable for the use status judging means, but the simplest case is that the press of a data broadcast receiving button (so-called d button) provided on the apparatus main body or remote control means capable of controlling the apparatus main body is detected. For example, it is conceivable to determine that data broadcasting is mainly used. In addition, in order to make a determination based on an event closed on the device side, the transfer status is made variable using information on which of the TV plane and the graphic plane among the display planes (not shown) is displayed at the top. Things are possible.
FIG. 7 schematically shows a typical operation of the recording means (7). FIGS. 7A and 7B are described with reproduction in mind, and the recording means (7) specifies a recording location on the board of the corresponding data (seek) in a form corresponding to the command set of the processor. ) And the like, reading from the recording medium and data transfer are performed. The operation is the same in recording. The series of sequences is common to both (A) and (B), but (B) has more data to be transferred at a time than (A), and in this example is about twice as large. As is clear from comparison between (A) and (B), the larger the amount of data for one command issuance, the more advantageous the data transfer efficiency. However, as described in the conventional example, the AV stream has its own limit because data underrun is not allowed. However, in the present invention, for example, when the user is viewing a data broadcast, the graphic plane is displayed and the operation of the graphic plane is not performed. Since it is the main subject, the data transfer margin of the AV stream, which normally has a sufficient margin, is reduced, and the processing speed is improved by performing scheduling that focuses on data transfer and processing of data broadcasting. Things. It should be noted that the same function can be used not for improving the performance but for realizing the same function with a cheaper CPU.
[0020]
FIG. 8 is a diagram for explaining the fourth and tenth embodiments.
[0021]
(1) to (12) are common to FIG. 15, and the operation is the same as in the conventional example.
According to the fourth and tenth aspects of the present invention, as shown in FIG. 8, an error processing variable means (17) is newly added as compared with the conventional example, so that the user can set the AV stream (normally). (TV program) or data broadcasting, the read error processing of the recording means (7) can be controlled. The gist of the fourth and tenth aspects of the present invention is illustrated in FIG. FIGS. 10A, 10B, 10C, and 10D schematically show the operation of the recording means 7 as in FIG. 7, but an error occurred during reading and a retry operation occurred. The case is explained. (A) shows a state without an error (normal operation), (B), (C), and (D) show a case where an error occurs, (B) shows a case where the number of retries is large, and (C) shows a case where an error occurs. When the number of retries is small, (D) shows the case where there is no retry. In the figure, the data transfer portion is shown as an X shape, which indicates that data containing errors may be transferred. In the invention according to the fourth and tenth aspects, the trigger for controlling is the same as in the first, second, third, seventh, eighth and ninth aspects. ), And controls the number of retries according to the situation. As an example of the control, for example, it is conceivable to reduce the setting of the number of retries or not to perform the retries when the d button is pressed or the graphic plane is preferentially displayed. For error processing, besides making the number of retries variable, for example, when the data stream is mainly used and the AV stream is used secondarily, the error rate of the AV stream becomes high. A method for changing the error rate threshold for error correction of data, such as raising the error rate threshold for error correction and giving priority to data broadcast processing, for correcting data error The playback method can be changed according to the error rate for correcting data errors, such as changing the playback rate according to the error rate, or switching to black and white when color display is not performed normally in the AV stream. And the like.
FIG. 9 is an operation flowchart of the invention according to claims 4 and 10. The operation will be described with reference to FIG. 9. The use status of the AV stream and the data broadcast data is determined (step S400), and the processing at the time of occurrence of a read error of the recording unit is adaptively performed according to the result of the use status determination step S400. The data is changed (step S401), and the data is transferred in the processing at the time of occurrence of a read error of the recording means determined in step S401 (step S402).
[0022]
FIG. 11 shows an embodiment according to the fifth and eleventh aspects.
[0023]
(1) to (12) are common to FIG. 15, and the operation is the same as in the conventional example.
In FIG. 11, an encoding rate information acquiring unit (18) and a buffer allocating unit (19) are newly provided as compared with the conventional example. In order to realize the encoding rate information acquisition means, it is possible to detect the actual AV stream by extracting the corresponding stream and counting it. However, in digital broadcasting, the detection is described in the program arrangement information. (More specifically, the value of the default coding rate in the case of unspecified is specified, and by describing only when the value deviates from the default value, the data band to be transferred is saved.) Therefore, the program arrangement information can be extracted and recognizable relatively easily by a method similar to the data broadcast data selection means (9). The gist of claim 5 and claim 11 is that, based on the coding rate obtained by the above-mentioned means and the like, an AV stream data reproduction buffer (8) and a data broadcast data reproduction buffer (12) are managed integrally, and The buffer allocation means (19) allocates the buffer capacities of the AV stream data reproduction buffer (8) and the data broadcast data reproduction buffer (12) according to the result of the coding rate information acquisition means (18). In allocating the buffer, a buffer type such as a volatile memory such as a DRAM or an SRAM is assigned to an AV stream, and a rewritable unit such as a nonvolatile memory such as an HDD is assigned to data broadcasting data, or vice versa, or a combination thereof. May be assigned.
[0024]
As an example of the operation of the integrated buffer, if the AV stream has a high rate, the ratio of the AV stream reproduction buffer is increased as shown in FIG. In this case, it is more efficient to increase the amount of data transfer at one time. Conversely, when the AV stream has a low rate, it is possible to increase the capacity of the data broadcast reproduction buffer and improve the processing capability of the data broadcast, as shown in FIG. As a result, it is possible to save the buffer capacity and effectively use the CPU capacity. FIG. 12 is an operation flowchart of the invention according to claims 5 and 11. The operation will be described with reference to FIG. 12. Encoding rate information is obtained from an AV stream or the like (step S500), and a buffer size for AV stream data reproduction and a data broadcast data reproduction A buffer size is dynamically allocated (step S501), and data is transferred using the AV stream data reproduction buffer size and the data broadcast data reproduction buffer size determined in step S501 (step S502).
[0025]
Also in this section, it is possible to use the same function for realization with a cheaper CPU instead of improving the same function.
[0026]
FIG. 13 shows an embodiment according to the sixth and twelfth aspects.
Similar to the first, second, third, seventh, eighth, and ninth aspects, (1) to (12) are common to FIG. 15, and the operation is the same as that of the conventional example. It is. In FIG. 13, a frame number detecting means (20) and a transfer processing ratio allocating means (21) are newly provided as compared with the conventional example. In MPEG2 used in digital broadcasting and the like, a code (PSC; Picture Start Code) representing the head of a frame (picture) or a code (SHC; Sequence) representing the head of a frame unit (GOP; GroupOf Picture) used for encoding. Since various types of frame information such as a header code and a GSC (Group Start Code) are included, it is possible to know the number of frames by appropriately using such detection information. Based on the number of frames or the number of GOPs detected by the number-of-frames detecting means (20), the transfer processing ratio allocating means (21) determines the buffer capacity used for data broadcast data transfer and playback processing, and the AV stream data transfer and playback processing. Of the buffer capacity to be used can be dynamically allocated. Note that the number of frames may be detected both from coded data and from data after decoding. Normally, transfer control from the recording means (7) to the AV stream data reproduction buffer (8) is controlled by the amount of data (in an encoded state) stored in the AV stream reproduction buffer. Sometimes the amount is not directly reflected in the number of frames, leaving room for improvement. In particular, when the amount of data and the number of frames in a coded state greatly change, such as in a VBR (variable transfer rate system), this phenomenon becomes remarkable, and waste of buffer control increases. In the sixth and twelfth aspects of the present invention, this point is improved by performing control based on the number of frames after decoding instead of the amount of encoded data. In FIG. 13, (B) shows a case where a large capacity of a buffer used for AV stream data transfer and reproduction processing is allocated, and (C) shows the reverse case. FIG. 14 is an operation flowchart of the invention according to claims 6 and 12. The operation will be described with reference to FIG. 14. The number of frames is detected from an AV stream or the like (step S600), and the ratio of data broadcast data transfer and reproduction processing is dynamically allocated according to the result of the frame number detection step S600 ( Step S601), the data is transferred at the rate of the data broadcast data transfer and reproduction processing determined in step S601 (step S602).
[0027]
【The invention's effect】
According to the first, second, third, seventh, eighth, and ninth aspects of the present invention, by reducing the overhead in the operation of the recording medium, the effect of reducing the load on the processor involved in data transfer can be obtained. In addition, the speed of the data broadcasting process can be increased as a secondary effect. If the processing capacity is the same as that of the system to which the present invention is not applied, the same function can be applied to lower the price of the processor.
[0028]
According to the fourth and tenth aspects, it is possible to increase the speed of the data broadcasting process as a secondary effect by reducing the overhead of the processor involved in the data transfer by reducing the overhead when an error occurs in the recording medium. Will be possible. If the processing capacity is the same as that of the system to which the present invention is not applied, the same function can be applied to lowering the processor price.
[0029]
According to the fifth, sixth, eleventh, and twelfth aspects, the buffer capacity of the AV stream and the data broadcast data can be efficiently used, and the cost can be reduced by reducing the buffer capacity. In addition, by optimizing the transfer control, it is possible to expect an effect of reducing the load on the processing processor related to the data transfer, and claims 1, 2, 3, 4, 7, 8, and 9. It is possible to obtain the same effects as those of the ninth and tenth aspects.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of an embodiment according to claims 1 and 7;
FIG. 2 is a flowchart of an embodiment according to claims 1 and 7;
FIG. 3 is a functional block diagram of an embodiment according to claims 2 and 8;
FIG. 4 is a flowchart of an embodiment according to claims 2 and 8;
FIG. 5 is a functional block diagram of an embodiment according to claims 3 and 9;
FIG. 6 is a flowchart of an embodiment according to claims 3 and 9;
FIG. 7 is an explanatory diagram of the operation of the recording means according to the embodiment according to claim 1, claim 2, claim 3, claim 7, claim 8, or claim 9;
FIG. 8 is a functional block diagram of an embodiment according to claims 4 and 10;
FIG. 9 is a flowchart of an embodiment according to claims 4 and 10;
FIG. 10 is an explanatory diagram of the operation of the recording unit according to the embodiment according to claims 4 and 10;
FIG. 11 is a functional block diagram of an embodiment according to claims 5 and 11;
FIG. 12 is a flowchart of an embodiment according to claims 5 and 11;
FIG. 13 is a functional block diagram of an embodiment according to claims 6 and 12;
FIG. 14 is a flowchart of an embodiment according to claims 6 and 12;
FIG. 15 is a functional block diagram of a conventional example.
[Explanation of symbols]
(1) ・ ・ ・ Tuner
(2) ... demodulation unit
(3)... AV stream data selection means
(4)... Decoding part
(5) ・ ・ ・ Projecting means
(6)... AV stream data recording buffer
(7) Recording means
(8)... AV stream data playback buffer
(9) Data broadcasting data selection means
(10) Data broadcasting data processing unit
(11) ・ ・ ・ Data broadcast data recording buffer
(12)... Buffer for reproducing data broadcast data
(13) ・ ・ ・ Usage status determination means
(14) ・ ・ ・ Schedule means
(15) ・ ・ ・ Transfer amount variable means
(16) ... schedule transfer amount variable means
(17) ・ ・ ・ Error processing variable means
(18) ... coding rate information acquisition means
(19) ・ ・ ・ Buffer allocating means
(20) ・ ・ ・ Frame number detecting means
(21) ・ ・ ・ Transfer processing ratio allocating means

Claims (12)

A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a usage status determining unit that determines which one of the AV stream and the data broadcast is mainly used by a user;
Schedule means for adaptively changing the transfer schedule of each data related to the simultaneous processing based on the output information of the use state determination means;
A digitally encoded information recording / reproducing apparatus, comprising: A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a usage status determining unit that determines which one of the AV stream and the data broadcast is mainly used by a user;
A transfer amount varying unit that adaptively varies a data transfer amount per data of each data related to the simultaneous processing based on output information of the use state determining unit;
A digitally encoded information recording / reproducing apparatus, comprising: A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a usage status determining unit that determines which one of the AV stream and the data broadcast is mainly used by a user;
A digital data transmission system comprising: a schedule transfer amount changing unit that adaptively changes a transfer schedule of each data and a data transfer amount per transfer based on output information of the use state determining unit. Encoded information recording / reproducing device. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a usage status determining unit that determines which one of the AV stream and the data broadcast is mainly used by a user;
A digital encoded information recording / reproducing apparatus comprising: an error processing variable unit that adaptively changes a process when a reading error occurs in the recording unit based on the output information of the use state determining unit. What is claimed is: 1. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, comprising: encoding rate information acquiring means for acquiring encoding rate information of a digitally encoded AV stream;
A buffer allocating means for dynamically allocating a buffer size for reproducing the stored AV stream data and a buffer size for reproducing the data broadcast data based on the coding rate information obtained by the coding rate information obtaining means;
A digitally encoded information recording / reproducing apparatus, comprising: A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast. When transferring the AV stream to a reproduction buffer, the number of frames of a reproduction screen or a set unit of a coded frame (GOP; Group) Of Picture) frame number detecting means;
Transfer processing ratio allocating means for dynamically allocating the ratio of transfer and reproduction processing of data broadcast data based on the number of frames or the number of GOPs detected by the frame number detecting means. Digital coded information recording and reproducing device. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a use state determining step of determining whether the user mainly uses the AV stream or the data broadcast;
A scheduling step of adaptively changing a transfer schedule of each data related to the simultaneous processing based on the output information of the use status determining means;
And a digitally encoded information recording / reproducing method. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a use state determining step of determining whether the user mainly uses the AV stream or the data broadcast;
A transfer amount changing step of adaptively changing a data transfer amount per data of each data related to the simultaneous processing based on output information of the use state determining means;
And a digitally encoded information recording / reproducing method. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a use state determining step of determining whether the user mainly uses the AV stream or the data broadcast;
Digitally encoded information recording / reproducing including a schedule for changing the transfer schedule of each data and the transfer amount of data per transfer adaptively based on the output information of the use status determining means. Method. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, wherein a use state determining step of determining whether the user mainly uses the AV stream or the data broadcast;
An error process changing step of adaptively changing a process at the time of occurrence of a read error of the recording unit based on output information of the use state judging unit. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast, the encoding rate information acquiring step of acquiring encoding rate information of a digitally encoded AV stream;
A buffer allocating step of dynamically allocating a buffer size for reproducing the stored AV stream data and a buffer size for reproducing the data broadcast data based on the coding rate information obtained by the coding rate information obtaining means;
And a digitally encoded information recording / reproducing method. A recording / reproducing apparatus capable of simultaneously processing a digitally encoded AV stream and a data broadcast. When transferring the AV stream to a reproduction buffer, the number of frames of a reproduction screen or a set unit of a coded frame (GOP; Group) Of Picture) frame number detection step;
And a transfer processing ratio allocating step of dynamically allocating a ratio of data broadcast data transfer and reproduction processing based on the number of frames or the number of GOPs detected by the frame number detecting means. Playback method.

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