JP2002204425A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file system that is suitable for recording and reproduction of a digital broadcast program. SOLUTION: The recording and reproducing device is provided with a reception means that receives a digital video audio signal, a recording medium that is divided into areas each of which a number is cross-referenced with, a recording means that records a program consisting of the digital video audio signal between a 1st address and a 2nd address in the division area, a storage means that stores a table that is used to cross-reference one program with a number cross-referenced with one area and to cross-reference one program with the 2nd address, an arithmetic means that calculates the 1st address on the basis of the number stored in the storage means, and a reproduction means that reproduces one program recorded on the recording medium on the basis of the 1st address calculated by the arithmetic means and the 2nd address stored in the table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for receiving a digital broadcast or an analog broadcast, converting it into a digital video / audio signal, and recording it on a recording medium.

[0002]

2. Description of the Related Art A typical digital video / audio signal M
A conventional apparatus capable of recording and reproducing a PEG (Moving Pictures Experts Group) stream is disclosed in JP-A-11-398.
There is a recording / reproducing apparatus disclosed in Japanese Patent Application Publication No. 50-205. FIG. 7 shows a configuration example of a recording / reproducing apparatus based on a computer disclosed in Japanese Patent Application Laid-Open No. 11-39850.
1 is a microprocessor, 702 is a main memory, 70
3 is a bus bridge, 704 is an I / O (Input / Output) interface, 705 is an auxiliary storage interface,
706 is a hard disk connected to the auxiliary storage interface, 707 is an MPE with a built-in TV tuner
G real-time encoder board, 708 an AV processing circuit, and 709 a memory (VRAM) used by the AV processing circuit 708 for image display processing.

[0003] The microprocessor 701, the main memory 702, and the bus bridge 703 are connected to each other via an internal bus, and the remaining blocks are connected to each other via an expansion bus. Bus bridge 703
Is an internal bus and, for example, a PCI (Peripheral Component).
Interconnect) bus and ISA (Industry Standard Arc)
hitecture) Controls the exchange of data with expansion buses such as buses.

The auxiliary bus includes an auxiliary storage interface 705 and an MPEG real-time encoder board 70.
7, an AV processing circuit 708 is connected, and a hard disk 706 is connected to the auxiliary storage interface 705.

[0005] The microprocessor 701 executes various application programs recorded on the hard disk 706 under the control of the operating system and recorded on the hard disk 706, for example, to record, reproduce, edit, and decode images. Processing and other predetermined processing are performed.

[0006] MPEG real-time encoder board 7
07 converts images and sounds in real time, for example,
It encodes according to the MPEG1 standard and has a built-in TV tuner for receiving a television broadcast program.
G encoding can be performed.

The AV processing circuit 708 is, for example, a VGA
(Video Graphics Array), a three-dimensional accelerator (both not shown), and the like, and perform video display on a display and audio output to a speaker. The AV processing circuit 708 has a built-in NTSC encoder, and can output an image conforming to the NTSC system to, for example, a VTR.

[0008] The hard disk 706 records
Image recording of images by application program,
Processing such as reproduction, editing, and decoding is performed. For example,
The television broadcast program received by the TV tuner of the MPEG real-time encoder board 707 is encoded into an MPEG stream, and the data is recorded on a hard disk 706 via an extension bus. Further, during the recording, the reproduction of an arbitrary scene of the already recorded video (image) is also performed.

The lower part of FIG. 7 shows a file system called FAT (File Allocation Table) generally used in a computer. 710 is a file table, and 711 is a cluster table.
712 is a file name index, 713 is an extension column, and 714 is a first cluster column, and these constitute a file table 710. 715 is an entry number index, 716 is a FAT ID column, 717
Is a cluster number string, and these constitute a cluster table 710.

A hard disk has a minimum unit of data recording called a sector. For example, an IDE (Integrat
ed Drive Electronics) type hard disk,
The sector size is 512B (bytes). In the case of recording data on a hard disk, a computer generally divides and records data in units called clusters in which sectors are raised to the power of 2, and the cluster size is fixed at 32 kB or 4 kB. Often. For example, if a file named abcd.exe is divided into four clusters (second cluster, third cluster, fifth cluster, and eighth cluster) and recorded on the hard disk, first, a file table The file name “abcd” is stored in the file name index 712 of “710”, and “exe” is stored in the extension column 713. The first cluster column 714 stores the first cluster number of the divided and recorded cluster (here, 2 indicating the second cluster).

When actually reading the data of the file "abcd.exe", an entry corresponding to the second cluster 2 is searched from the entry number index 715 of the cluster table 711. Also, the FAT of the second entry
The next entry number (here, 3 indicating the third cluster) is stored in the ID column 716. A symbol indicating the end of data (here, EOF, End Of File)
Repeat until you find the file "abcd.ex
e "can be recognized as being divided into a second cluster, a third cluster, a fifth cluster, and an eighth cluster and recorded. The microprocessor 701
The data of the file “abcd.exe” is obtained by reading the data of the second, third, fifth and eighth clusters of the hard disk 706 by controlling the auxiliary storage interface 705. The above-described series of procedures is the same whether the content of the file is normal computer data or video / audio signal data.

[0012]

A conventional recording / reproducing apparatus records and reproduces a digital broadcast using the above-described file system. However, this file system has been developed for computers and can efficiently record small files, but is not suitable for recording large programs such as digital broadcasts. In particular, there was a problem that the file system was complicated.

Further, since the file system of the computer employs a fixed-size recording unit (cluster) irrespective of the capacity of the hard disk, the size of the file system increases as the number of files to be recorded increases. Therefore, it has been difficult to store the file system in a relatively small memory device such as a nonvolatile RAM.

In general, the hard disk has a large difference in data transfer speed between the outer circumference and the inner circumference of the platter.
Since a fixed-size recording unit (cluster) is always used regardless of the data transfer speed, there is a problem that a large difference occurs in data transfer performance particularly in recording or reproduction in a state where fragmentation has progressed. there were.

The present invention provides a recording / reproducing apparatus having a file system suitable for recording / reproducing a large program such as a digital broadcast. Further, the present invention provides a recording / reproducing apparatus in which the size of a file system is hard to increase. Still further, the present invention provides a recording / reproducing apparatus provided with a file system having excellent data transfer performance during reproduction.

[0016]

A recording / reproducing apparatus according to the present invention comprises: receiving means for receiving a digital video / audio signal;
The recording medium is divided into a plurality of areas, and a number is assigned to each area, and the digital video / audio signal is provided between a first address and a second address in one of the divided areas. Recording means for recording one program, storage means for associating the one program with the number associated with the one area, and storing a table for associating the one program with the second address; Calculating means for calculating the first address based on the number stored in the storage means, and the recording based on the first address calculated by the calculating means and the second address stored in the table. Playback means for playing back the one program recorded on the medium.

Further, in the recording / reproducing apparatus according to the present invention, the recording medium is divided into a plurality of areas of a fixed size.

In the recording / reproducing apparatus according to the present invention, the recording medium is replaceable, and the recording medium is divided into a plurality of areas of a fixed size which do not change depending on the recording capacity of the recording medium.

Further, in the recording / reproducing apparatus according to the present invention, the recording medium is replaceable, and the recording medium is divided into a fixed number of areas which do not change depending on the recording capacity of the recording medium.

Further, in the recording / reproducing apparatus according to the present invention, the receiving means for receiving the digital video / audio signal, the recording medium divided into a plurality of exchangeable areas including different sizes, and the divided Recording means for recording one program composed of the digital video / audio signal between a first address and a second address in one area; and the one program, the first address, and the second address Storage means for storing a table for associating the first program with the second program, and reproduction means for reproducing the one program recorded on the recording medium based on the first address and the second address stored in the storage means. .

Further, in the recording / reproducing apparatus according to the present invention, the recording medium is divided such that the size of the recording medium on the inner peripheral side is larger than that on the outer peripheral side of the recording medium.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows a first embodiment of the present invention.
An input digital video / audio signal such as a PEG2 transport stream, 2 an input buffer device composed of a FIFO (First In First Out) memory or the like, 3 a recording device, 4 a recording medium such as a hard disk, 5 a reproducing device,
Reference numeral 6 denotes an output buffer device constituted by a FIFO memory or the like, and reference numeral 7 denotes an output digital video / audio signal. 8 is CPU
(Central Processing Unit), 9 is C
CPU bus 10 controlled by PU8, CPU bus 9
The memory device connected above, 11 is the memory device 10
Is a file system stored in Also, 1
01 is a zone obtained by dividing the recording medium 4, and 102 is a program recorded on the recording medium 4. 111 is a zone table constituting the file system 11, 112 is a zone number index, 113 is a program number sequence, and 114 is a chain information sequence. 115 is a program table constituting the file system 11, 116 is a program number index, 117
Is a start zone number column, and 118 is a program property column.

Here, the operation of the first embodiment will be described. The input digital video / audio signal 1 is, for example, a signal received from a digital satellite broadcast or the like, and transmits a program 102 composed of compression-coded video and audio signals in accordance with the MPEG2 transport stream format. Program 1
As an operation at the time of recording 02, the input digital video / audio signal 1 is temporarily buffered (accumulated) by a certain amount by the input buffer device 2 and then by the recording device 3 to the recording medium 4
Is recorded in bursts. The recording medium 4 is divided in advance into N zones 101 of a fixed size, and one zone 101 is configured to record a single program 102. The value of N is the size of the recording medium 4 and the zone 1
01 is determined by the size. When the program 102 extends for a long time, it is recorded in a plurality of zones 101, but one zone 101 does not include a plurality of different programs (for example, the first and second programs 102) at the same time. As an operation at the time of reproducing the program 102, data is read from the head of the zone 101 corresponding to the program 102 to be reproduced by the reproducing device 5, and is transmitted to the output buffer 6 in a burst manner and temporarily buffered. The output buffer 6 transmits the output digital video / audio signal 7 to a subsequent decoder device (not shown) and decodes the video / audio data to obtain reproduced video / audio. The input buffer device 2, the recording device 3, the reproducing device 5, and the output buffer device 6 are connected to the CPU bus 9 and are controlled by the CPU 8.

In general, in the recording medium 4 using a disk medium, as the continuity of data is secured, the overhead for moving the head is reduced, and the data transfer performance of recording and reproduction is improved. The recording medium 4 is divided into N areas in advance, and the program 1
By using it as a recording unit of 02, even if recording and erasing are repeated, data continuity for at least one area is secured as much as possible.

In the first embodiment, as shown in the figure, a first program 102 is stored in a first zone 101 (zone 1 in the figure).
However, the second program 102 is recorded in the second and third zones 101 (zones 2 and 3 in the figure).
It is assumed that information (file system 11) for associating 01 with a recorded program is stored in the memory device 10.

The file system 11 comprises a zone table 111 and a program table 115. The zone table 111 includes a zone number index 112, a program number column 113, and a chain information column 114.
The zone number index 112 corresponds to each zone 101 in the recording medium 4, and is composed of N indexes in this embodiment. The program number column 113 indicates that each zone 101
Indicates which program is recorded. The chain information sequence 114 includes the recording chain information of the program, and indicates in which zone 101 the program is recorded next by the number of the zone 101. If there is no zone 101 recorded next, that is, if it is the last zone, a symbol (here, EOF, End Of File) indicating the end of the program is shown.

The program table 115 includes a program number index 116, a start zone number column 117, and a program property column 118. The program number index 116 corresponds to each of the programs 102, and in this embodiment, is composed of M indexes. That is, the number of programs that can be stored in the recording medium 4 has an upper limit of M pieces. The value of M does not exceed the value of N at most. The start zone number column 117 indicates which zone 10
1 indicates whether the information is recorded. The program property column 118 indicates the attribute of each program. In particular,
Although program title information and character information indicating program contents are conceivable, the method of use is arbitrary.

When reproducing a program, the CPU 8 first extracts information corresponding to the program 102 to be reproduced from the program table 115. That is, the start zone number column 117 of the program number index 116 corresponding to the program 102 to be reproduced.
, The start zone number is detected, the reproducing device 5 is controlled to reproduce the program from the recording medium 4, and is transferred to the output buffer device 6.

Here, for example, when reproducing the second program 102 from the state of FIG.
By searching the number of the first zone 101 where the program 102 is recorded, it can be known that the program 102 is recorded from the second zone 101. The CPU 8 controls the reproducing device 5 to start reproducing data from the second zone 101 of the recording medium 4. When the data reproduction of the second zone 101 is completed, the CPU 8 sets the zone number index 112 corresponding to the second zone 101 in the zone table 111.
From the chain information sequence 114 of the zone 101 to be reproduced next.
Search for the number. In this case, the third zone 101
Can be reproduced. When the reproduction of the third zone 101 is completed, the chain information of the third zone 101 is similarly searched from the zone table 111. In this case, since the EOF is detected this time, the reproduction of the second program 102 is completed in the third zone 101.

When recording a program, the CPU 8 first searches the zone table 111 for a recordable zone 101. Specifically, the zone number where no program is recorded can be known from the program number column 113 of the zone number index 112. If the recordable zone 101 is found, the zone 1 to be recorded next in the start zone number column 117 of the program number index 116 in the program table 115
01 and the zone table 111
The number of the program 102 is entered in the program number column 113 in the middle.
If the recording of the program exceeds the size of the zone 101, the above procedure is further repeated and the recordable zone 10
Search for 1. When the program spans a plurality of zones 101 in this manner, the chain information sequence 1 in the zone table 111
14, the chain information (the number information of the zone 101 to be reproduced next) is entered. To end the recording of the program, a symbol (here, EOF) indicating the end of the program is entered in the chain information sequence 114 in the zone table 111. In the program property column 118 in the program table 115, information accompanying the program such as a program title character string can be recorded.

Here, for example, from the state of FIG.
When the program number is recorded, the program number column 113 in the zone table 111 is searched in order, and no program is recorded in the fourth zone 101 of the program number index 112, that is, the program is recordable. Therefore, the CPU 8 controls the recording device 3 to start recording in the fourth zone 101 of the recording medium 4 and, at the same time, searches for the zone number index 112 corresponding to the fourth zone 101 in the zone table 111. In the program number column 113, the third
"3" indicating the program 102 is entered. Program record is fourth
If the operation is completed in the zone No., EOF is entered in the chain information column 114 corresponding to the fourth zone in the zone table 111. If the program recording is not completed in the fourth zone, the above procedure is further repeated, and the recordable zone 10
Search for 1 and continue recording. Also, the program table 115
In the start zone number column 117 corresponding to the third program in the middle program number index 116, “4” indicating the fourth zone 101 is entered.

When erasing a program, the CPU 8 first selects a start zone number column 11 of a program number index 116 corresponding to the program 102 to be erased from the program table 115.
7, the number of the start zone 101 is detected. Next, all the zones 101 occupied by the program 102 to be deleted are detected from the program number column 113 and the chain information column 114 of the zone number index 112 corresponding to the detected start zone 101 in the zone table 111. All zones 101
Is detected, the program number column 113 and the chain information column 114 of the corresponding zone number index 112 in the zone table 111 are cleared, and the start zone number column 117 and the program property column 118 in the program table 115 are also cleared. By doing so, the deletion of the program can be completed.

Here, for example, when deleting the second program 102 from the state shown in FIG. 1, the start zone number column 117 of the program number index 116 corresponding to the second program 102 in the program table 115 is searched. It can be seen that the second program 102 starts from the second zone 101. Next, by searching the chain information sequence 114 corresponding to the second zone 101 in the zone table 111, it is found that the second program 102 is further continued to the third zone 101. Similarly, the zone table 111
By searching the chain information sequence 114 corresponding to the third zone 101 therein and detecting the EOF, it is possible to know that the second program 102 is completed in the third zone 101. These are the same as the procedure for reproducing the second program 102. Here, the program number column 113 and the chain information column 114 of the zone number index 112 corresponding to the second zone 101 and the third zone 101 in the zone table 111 are cleared (there is no data), so that the zone table 111 is cleared. The information about the second program is deleted. Also, the information on the second program is erased from the program table 115 by clearing the start zone number column 117 and the program property column 118 corresponding to the second program 102 in the program table 115.

In this embodiment, when the CPU 8 executes recording or reproduction of the program 102 in an arbitrary zone 101, position information of each zone 101 (address information of the recording medium 4) is required. From the predetermined size of the zone 101 and the number of the zone 101,
The position information can be obtained by the CPU 8 performing a simple calculation.

When the size of the zone 101 is set to be sufficiently large, a difference occurs between the size of the zone 101 (or a multiple thereof) and the size of the program 102, so that the last zone 101 of the program 102 is reproduced. In such a case, there is a possibility that invalid data is reproduced. In this case, the last address of the program 102 is entered as one of the attributes of the program property column 118 in the program table 115, and when the last address is reached during the reproduction of the last zone 101, the reproduction is terminated. Failures can be avoided.

In this embodiment, the file system 11
Is stored in the memory device 10, but a nonvolatile memory is used so that the information can be retained even when the power of the digital broadcast receiver is turned off, or the file system 11 is stored in the nonvolatile memory before the power is turned off. It is desirable to save. Alternatively, the file system 11 may be stored in the recording medium 4.

Embodiment 2 FIG. 2 shows a second embodiment of the present invention, in which 21 is a file system according to the present embodiment, 121 is a program zone table showing a relationship between the program 102 and the zone 101, 122
Is a program number index corresponding to the program 102;
Reference numeral 3 denotes a zone number column corresponding to the zone 101, reference numeral 124 denotes a program property column, and the other components are the same as those in the first embodiment.

Here, the operation of the second embodiment will be described. In the second embodiment, as in the first embodiment, the first program 102 is placed in the first zone 101 (zone 1 in the figure) and is placed in the second and third zones 101 (zone 2 and zone 3 in the figure). A second program 102 is recorded, and information (file system 2) that associates each zone 101 with the recorded program is recorded.
1) is stored in the memory device 10.

The file system 21 includes a program zone table 121. Program zone table 121
Is a program number index 122 and a zone number column 123
And a program property column 124. The program number index 122 corresponds to each recorded program, and is composed of M indexes in this embodiment.
That is, the number of programs that can be stored in the recording medium 4 has an upper limit of M pieces. The zone number string 123 corresponds to each zone 101 in the recording medium 4 and includes N indexes.
The value of N is determined by the size of the recording medium 4 and the size of the zone 101. The value of M does not exceed the value of N at most. A certain program 1 in the program zone table 121
In the zone number column 123 of the program number index 122 corresponding to “02”, order information for reproducing the program 102 is entered. The program property column 124 shows properties of each program. More specifically, program title information and character information indicating program contents can be considered, but the method of use is arbitrary.

When reproducing a program, the CPU 8 firstly reads the zone number column 1 of the program number index 122 corresponding to the program 102 to be reproduced from the program zone table 121.
Search for 23. That is, the program number index 122
From the index corresponding to the program 102 to be reproduced, a zone 101 in which the program 102 is recorded;
The reproduction order is detected, and from the zone 101 where the program 102 is recorded first, the reproduction apparatus 5 is controlled to control the recording medium 4.
, And transfers the data to the output buffer device 6.

Here, for example, when reproducing the second program 102 from the state of FIG. 2, the program number index 1 corresponding to the second program 102 in the program zone table 121 is set.
A search of the zone number string 123 of 22 indicates that the second zone 101 should be reproduced first and the third zone 101 should be reproduced second. The CPU 8 controls the playback device 5 to start playback from the second zone 101, and when the playback of the second zone 101 is completed, continues to the third zone 10
Playback is continued from 1. When the reproduction of the third zone 101 is completed, the reproduction of the second program 102 is completed.

When recording a program, the CPU 8 first searches the recordable zone 101 from the zone number column 123 in the program zone table 121. Recordable zone 1
01 is found, the program 10 is
Start recording the data of program 2
The reproduction order is entered in the zone number column 123 corresponding to the recordable zone 101 of the program number index 122 corresponding to the program number 02.

Here, for example, when a third program is newly recorded from the state of FIG. 2, the program reproduction order is not described in the fourth zone of the zone number string 123, that is, the recordable zone 101
"1" is entered as the reproduction order in the zone number column 123 of the program number index 122 corresponding to the third program.
Next, the CPU 8 controls the recording device 3 to transfer the data of the program 102 obtained from the input buffer device 2 to the recording medium 4.
Recording is started for the fourth zone 101 in the middle. 4th
Of the third program 10 has been completed.
When the recording of No. 2 is continued, the above procedure is further repeated to search for a recordable zone 101. In the program property column 124 of the program zone table 121, information accompanying the program such as a program title character string may be recorded.

When erasing a program, the CPU 8 first searches the program zone table 121 for a program number index 122 corresponding to the program 102 to be erased, and finds a zone number column 123 corresponding to the zone 101 in which the program is recorded.
Clear all the reproduction order information of (No).

Here, for example, when the second program 102 is deleted from the state of FIG. 2, when the zone number column 123 corresponding to the second program 103 in the program zone table 121 is searched, the second zone 101 is deleted. It can be seen that the second program 102 is recorded in the third zone 101. CP
U8 clears all of these written playback orders,
The second program 1 entered in the program property column 124
By clearing the accompanying information on the second program 102 as well, the information on the second program 102 can be deleted. As a more simplified erasing method, the procedure for detecting the zone 101 where the second program 102 is recorded is omitted, and the zone number column 123 and the program property column of the program number index 122 corresponding to the second program 102 are omitted. 124 may be cleared unconditionally.

In this embodiment, when the CPU 8 executes recording or reproduction of the program 102 in an arbitrary zone 101, position information of each zone 101 (address information of the recording medium 4) is required. From the predetermined size of the zone 101 and the number of the zone 101,
It can be obtained by a simple calculation.

When the size of the zone 101 is set to be sufficiently large, a difference occurs between the size of the zone 101 (or a multiple thereof) and the size of the program 102, so that the last zone 101 of the program 102 is reproduced. In such a case, there is a possibility that invalid data is reproduced. In this case, the final address of the program 102 is entered as one of the attributes of the program property column 124 in the program zone table 121, and when the final address is reached during the reproduction of the final zone 101, the reproduction is terminated. Can avoid the problem.

In this embodiment, the file system 21
Is stored in the memory device 10, but a nonvolatile memory is used so that the information can be retained even when the power of the digital broadcast receiver is turned off, or the file system 11 is stored in the nonvolatile memory before the power is turned off. It is desirable to save. Alternatively, the file system 21 may be stored in the recording medium 4.

Embodiment 3 FIG. 3 shows a third embodiment of the present invention. In the figure, reference numeral 31 denotes a file system according to the present embodiment. Reference numeral 103 denotes a zone obtained by dividing the recording medium 4, and reference numeral 131 denotes a file system 31.
, 132 is a zone number index, 133 is a program number sequence, 134 is a chain information sequence, and the rest is the same as in the first embodiment.

Here, the operation of the third embodiment will be described. The recording medium 4 is divided into a predetermined number of N zones 103 in advance, and one zone 103 is configured to record a single program 102. Unlike Embodiment 1, the value of N is always constant regardless of the capacity of the recording medium 4. The operations of recording, reproducing, and erasing the program 102 on the recording medium 4 are the same as those in the first embodiment.

Generally, in the recording medium 4 using a disk medium, as the continuity of data is ensured, the overhead for moving the head is reduced, and the data transfer performance of recording and reproduction is improved. The recording medium 4 is divided into areas of a certain size in advance, and the program 1
By using it as a recording unit of 02, data continuity of at least one area is ensured even when recording and erasing are repeated.

In this embodiment, the CPU 8 operates in any zone 1
When recording or reproducing the program 102 with respect to 03,
Although the position information of each zone 103 (address information of the recording medium 4) is required, if the size of each zone 103 is selected to be equal, the capacity of the recording medium 4 and the predetermined zone 103 From the number N, it can be obtained by a simple calculation.

In the third embodiment, since the value of N does not depend on the capacity of the recording medium 4, the number of rows of the zone number index 132 in the zone table 131 and the program number column 13
The number of columns of 3 and the chain information sequence 134 is constant. Thus, by keeping the number of zones 103 constant, the table size of the file system 31 is always constant regardless of the capacity of the recording medium 4. For example, the file system 31
It is necessary to store information even when the power of the digital broadcast receiver is turned off, and it is necessary to record the information in a non-volatile memory or the like. Since the size of the file system 31 does not increase, there is no need to expand the memory capacity.

Embodiment 4 FIG. 4 shows a fourth embodiment of the present invention. In the figure, reference numeral 41 denotes a file system according to the present embodiment, 103 denotes a zone obtained by dividing the recording medium 4, and 141 denotes a program 102 and a zone 103. The program zone table 142 showing the relationship
143 is the program number index corresponding to
The zone number string 144 corresponding to 03 is a program property string, and the rest is the same as in the second embodiment.

Here, the operation of the fourth embodiment will be described. The recording medium 4 is divided into a predetermined number of N zones 103 in advance, and one zone 103 is configured to record a single program 102. Unlike the second embodiment, the value of N is always constant regardless of the capacity of the recording medium 4. The operations of recording, reproducing, and erasing the program 102 on the recording medium 4 are the same as in the second embodiment.

In general, in the recording medium 4 using a disk medium, as the continuity of data is secured, the overhead for moving the head is reduced, so that the data transfer performance of recording and reproduction is improved. By dividing the recording medium 4 in advance into a predetermined number N of areas and using it as a recording unit of the program 102, even if recording and erasing are repeated, data continuity of at least one area is ensured.

In the present embodiment, the CPU 8 controls any zone 1
When recording or reproducing the program 102 with respect to 03,
Although the position information of each zone 103 (address information of the recording medium 4) is required, if the size of each zone 103 is selected to be equal, the capacity of the recording medium 4 and the predetermined zone 101 From the number N, it can be obtained by a simple calculation.

In the fourth embodiment, since the value of N does not depend on the capacity of the recording medium 4, the number of the zone number columns 142 in the program zone table 141 is constant. in this way,
By keeping the number of zones 103 constant, the table size of the file system 41 is always constant regardless of the capacity of the recording medium 4. For example, the file system 41 needs to retain information even when the power of the digital broadcast receiver is turned off, so it is necessary to record the information in a nonvolatile memory or the like. Even in this case, the size of the file system 41 does not increase, so there is no need to expand the memory capacity.

Embodiment 5 FIG. FIG. 5 shows a fifth embodiment of the present invention. In the figure, reference numeral 51 denotes a file system according to the present embodiment. Reference numeral 104 denotes a zone into which the recording medium 4 is divided, and 151 denotes a file system 51.
Is a zone number index, 153 is a program number column, 154 is a chain information column, 155 is a zone property column, and the rest is the same as in the first embodiment.

Here, the operation of the fifth embodiment will be described. The recording medium 4 is divided into N zones 104 in advance, and one zone 104 is configured to record a single program 102. Unlike the first embodiment, the size of each zone 104 is not constant. The operation of recording, reproducing, and erasing the program 102 on the recording medium 4 is the same as in the first embodiment.

In general, in the recording medium 4 using a disk medium, as the continuity of data is ensured, the overhead of moving the head is reduced, so that the data transfer performance of recording and reproduction is improved. By dividing the recording medium 4 into N areas in advance and using it as a recording unit of the program 102, data continuity of at least one area is ensured even when recording and erasing are repeated.

Therefore, in order to secure data transfer performance of recording and reproduction, that is, to secure data continuity, it is advantageous that the area size is large. On the other hand, when the data of the program 102 is less than one area (zone 104), the surplus in the area becomes an invalid data area that is not used, and as a result, the use efficiency of the recording medium 4 is reduced. It is desirable that the size of the zone 104 be small from the viewpoint of efficiency.

For example, a hard disk or the like has a high data transfer speed on the outer periphery of the platter, but in most cases the data transfer speed decreases on the inner periphery. Here, the data transfer speed means the data transfer speed between the platter and the head excluding the overhead such as the head moving time. Therefore, as the data transfer speed of the recording medium 4 is lower, it is necessary to secure more data continuity and reduce the overhead. In the present embodiment, the zone is divided such that the lower the data transfer rate, the larger the size of the zone 104. That is, each zone 10
The size of No. 4 is selected to be approximately inversely proportional to the data transfer rate. In this manner, by optimally selecting the size of each zone 104 according to the data transfer speed of the recording medium 4, it is possible to achieve both data transfer performance for recording and reproduction and recording efficiency.

In this embodiment, the CPU 8 operates in any zone 1
When recording or reproducing the program 102 with respect to the program 04,
Unlike the first embodiment, it is difficult to obtain the position information (address information of the recording medium 4) of each zone 104 by a simple calculation. In this case, the start address, end address, and the like of each zone 104 are described as attributes in the zone property column 155 of the zone number index 152 corresponding to each zone 104 in the zone table 151. Before performing recording or reproduction, address information can be obtained by referring to the zone property column 155.

Embodiment 6 FIG. FIG. 6 shows a sixth embodiment of the present invention. In the figure, reference numeral 61 denotes a file system according to the present embodiment, 163 denotes a zone obtained by dividing the recording medium 4, and 161 denotes a zone between the program 102 and the zone 104. The program zone table 162 showing the relationship is the program 10
2, a program number index 163 corresponding to the zone 104, a zone number sequence corresponding to the zone 104, 164 a program property sequence, 165 a zone property sequence, and others are the same as in the second embodiment.

Here, the operation of the sixth embodiment will be described. The recording medium 4 is divided into N zones 104 in advance, and one zone 104 is configured to record a single program 102. Unlike the second embodiment, the size of each zone 104 is not constant. The operations of recording, reproducing, and erasing the program 102 on the recording medium 4 are the same as those in the second embodiment.

Generally, in the recording medium 4 using a disk medium, as the continuity of data is ensured, the overhead for moving the head is reduced, and the data transfer performance of recording and reproduction is improved. The recording medium 4 is divided into N areas in advance, and the program 1
By using it as a recording unit of 02, data continuity of at least one area is ensured even when recording and erasing are repeated.

Therefore, in order to ensure data transfer performance of recording and reproduction, that is, to ensure data continuity, it is advantageous that the area size is large. On the other hand, when the data of the program 102 is less than one area (zone 104), the surplus in the area becomes an invalid data area that is not used, and as a result, the use efficiency of the recording medium 4 is reduced. It is desirable that the area size is small from the viewpoint of efficiency.

For example, a hard disk or the like has a high data transfer speed on the outer periphery of the platter, but in most cases the data transfer speed decreases on the inner periphery. Here, the data transfer speed means the data transfer speed between the platter and the head excluding the overhead such as the head moving time. Therefore, as the data transfer speed of the recording medium 4 is lower, it is necessary to secure more data continuity and reduce the overhead. In the present embodiment, the zone is divided such that the lower the data transfer rate, the larger the size of the zone 104. That is, each zone 10
The size of No. 4 is selected to be approximately inversely proportional to the data transfer rate. In this manner, by optimally selecting the size of each zone 104 according to the data transfer speed of the recording medium 4, it is possible to achieve both data transfer performance for recording and reproduction and recording efficiency.

In the present embodiment, the CPU 8 controls any zone 1
When recording or reproducing the program 102 with respect to the program 04,
Unlike the second embodiment, it is difficult to obtain the position information (address information of the recording medium 4) of each zone 104 by a simple calculation. In this case, the start address and end address of each zone are described as attributes in the zone property column 165 of the zone number column 163 corresponding to each zone 104 in the program zone table 161. Before recording or reproduction, address information can be obtained by referring to the zone property column 165.

[0071]

Since the present invention is configured as described above, it has the following effects. In the recording / reproducing apparatus according to the present invention, receiving means for receiving a digital video / audio signal, a recording medium divided into a plurality of areas, and a number associated with each area, and a recording medium in one of the divided areas Recording means for recording one program composed of the digital video and audio signals between the first address and the second address; and associating the one program with the number associated with the one area, Storage means for storing a table for associating the one program with the second address; calculating means for calculating the first address based on the number stored in the storage means; A reproducing unit that reproduces the one program recorded on the recording medium based on the first address and the second address stored in the table; Ruhodo even when large, it is possible to space management obtain easy recording and reproducing apparatus.

In the recording / reproducing apparatus according to the present invention, since the recording medium is divided into a plurality of areas of a fixed size, the management of the areas is easy, and
And a recording / reproducing apparatus in which the calculation of the address is easy.

In the recording / reproducing apparatus according to the present invention, the recording medium is exchangeable, and the recording medium is divided into a plurality of areas of a fixed size which do not change depending on the recording capacity of the recording medium. Even when the recording medium is replaced, the first address can be calculated without changing the calculation method in the calculation means.

In the recording / reproducing apparatus according to the present invention, the recording medium is exchangeable, and the recording medium is divided into a fixed number of areas which do not change according to the recording capacity of the recording medium. The size of the table can be constant regardless of the recording capacity of the recording medium.

Further, in the recording / reproducing apparatus according to the present invention, a receiving means for receiving a digital video / audio signal, a recording medium divided into a plurality of exchangeable areas each having a different size, Recording means for recording one program composed of the digital video / audio signal between a first address and a second address in one area; and the one program, the first address, and the second address Storage means for storing a table for associating the one program with the first address and the second address stored in the storage means, and reproduction means for reproducing the one program recorded on the recording medium based on the first address and the second address. Therefore, it is possible to obtain a recording / reproducing apparatus having excellent data transfer performance.

Further, in the recording / reproducing apparatus according to the present invention, the recording medium is divided so that the size of the recording medium on the inner peripheral side is larger than that on the outer peripheral side of the recording medium. Thus, it is possible to obtain a recording / reproducing apparatus having excellent data transfer performance.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a digital broadcast receiver with a built-in recording / reproducing function according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional recording / reproducing apparatus.

[Explanation of symbols]

1 input digital video / audio signal, 2 input buffer device, 3 recording device, 4 recording medium, 5 reproducing device, 6
Output buffer device, 7 output digital video / audio signal, 8
CPU, 9 CPU bus, 10 memory device, 11
File system, 21 file system, 31 file system, 41 file system, 51 file system, 61 file system, 101 zone, 102 program, 111 zone table, 112 zone number index, 113 program number column, 114
Chain information column, 115 program table, 116 program number index, 117 start zone number column, 118 program property column, 121 program zone table, 122
Program number index, 123 Zone number column, 12
4 Program property column, 131 Zone table, 13
2 zone number index, 133 program number sequence, 1
34 chain information sequence, 141 program zone table, 14
2 Program number index, 143 zone number string, 1
44 program property column, 151 zone table, 1
52 zone number index, 153 program number string, 1
54 Chain information column, 155 Zone property column, 16
1 Program zone table, 162 program number index, 163 zone number column, 164 program property column, 165 zone property column, 701 microprocessor, 702 main memory, 703 bus bridge, 704 I / O interface, 705 auxiliary storage interface, 706 hard disk , 707
MPEG real-time encoder board, 708 A
V processing circuit, 709 VRAM, 710 file table, 711 cluster table, 712 file name index, 713 extension column, 714 first cluster column, 715 entry number index, 716 FAT
ID column, 717 cluster number column

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/76 H04N 5/781 D 5/781 5/92 HF Term (Reference) 5B082 CA01 5C052 AA01 AB03 AB05 CC11 DD04 5C053 FA23 FA27 GB05 GB38 JA24 KA24 LA07 5D044 AB05 AB07 BC06 CC04 DE02 DE03 DE38 GK08

Claims (6)

[Claims] 1. A receiving means for receiving a digital video / audio signal, a recording medium divided into a plurality of areas, and a number associated with each area, a first address and a first address in one of the divided areas. Recording means for recording one program composed of the digital video and audio signals between two addresses, and associating the one program with the number associated with the one area, Storage means for storing a table for associating with a second address; calculation means for calculating the first address based on the number stored in the storage means; first address calculated by the calculation means; Recording means for reproducing the one program recorded on the recording medium based on the second address stored in the table. 2. The recording / reproducing apparatus according to claim 1, wherein the recording medium is divided into a plurality of areas of a fixed size. 3. The recording apparatus according to claim 2, wherein the recording medium is exchangeable, and the recording medium is divided into a plurality of areas of a fixed size which do not change according to the recording capacity of the recording medium. Playback device. 4. The recording medium according to claim 1, wherein the recording medium is exchangeable, and the recording medium is divided into a fixed number of areas that do not change according to the recording capacity of the recording medium. Recording and playback device. 5. A receiving means for receiving a digital video / audio signal, an exchangeable recording medium divided into a plurality of areas each having a different size, a first address and a first address in the divided area. Recording means for recording one program composed of the digital video / audio signal between two addresses; storage means for storing a table associating the one program with the first address and the second address; A recording / reproducing apparatus, comprising: reproducing means for reproducing the one program recorded on the recording medium based on the first address and the second address stored in the storage means. 6. The recording apparatus according to claim 5, wherein the recording medium is divided so that a size of an inner peripheral area is larger than an outer peripheral area of the recording medium. Playback device.