JP2000331423A - Disk recording/reproducing device and recording/ reproducing control thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize data recording of a moving image, etc. while securing the feature of real time with respect to a disk recording medium. SOLUTION: Data from a moving emage input part 4 are stored in a temporary storage means 1, and the storage state of the data in the specified amount is detected by a detecting means 9 of the data storage amount, then recording of the data to the disk recording medium is executed by a disk recording/ reproducing process means 2 without undergoing the control from an external system control part 6. By this procedure, a high recording bit rate is maintained, and the feature of real time for data recording is easily secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk recording medium such as a hard disk or an optical disk.
The present invention relates to a disk recording / reproducing apparatus for a moving image that requires real-time performance and a recording / reproducing control method thereof.

[0002]

2. Description of the Related Art In recent years, digitization of video / audio (moving image) data communicated through TV broadcasting or the Internet is rapidly progressing. A conventional disk recording / reproducing apparatus for recording / reproducing these moving images monitors a data input to the apparatus, and sequentially designates a recording length and a recording destination to a disk recording processing unit as necessary, thereby providing a disk recording medium. We have been recording moving images.

FIG. 5 is a diagram showing the basic configuration of a conventional disk recording / reproducing apparatus. Temporary storage means 1 for temporarily storing input data typified by a semiconductor memory such as a DRAM; disk recording / reproduction processing for recording and reproducing data on a disk recording medium typified by a DVD-RAM or MO; A disk recording / playback processing unit 3 comprising means 2 for converting analog data such as TV broadcasts into digital data, creating MPEG-compressed data to be recorded, and transmitting the data to the disk recording / playback processing unit 3 An image input unit 4, a moving image output unit 5 which converts digital data transmitted from the disk recording / reproducing processing unit 3 into analog data and outputs the analog data to a monitor or the like, a disk recording / reproducing processing unit 3, a moving image input unit 4, and a moving image output A system control unit 6 that controls the unit 5 and is in charge of application processing centering on a user interface (UI). I have.

FIG. 6 is a flowchart showing a control procedure for recording moving image data on a disk recording medium (not shown). First, the moving image input unit 4 is started to input data to be recorded into the disk recording / reproducing processing unit 3 in FIG. 5 (S2).
1). The buffer data amount stored in the temporary storage means 1 is calculated (S22). Based on the calculated data storage size, the recording position and recording length on the disk recording medium are given to the disk recording / reproducing processing unit 3 to execute data recording.
(S23). It is determined whether all necessary data (for example, the end of the recorded program) has been recorded, and if the recording has not been completed, the process returns to the calculation of the accumulated data amount (S24). The above (S21)
The data to be recorded is recorded by repeating the operations from (S24) to (S24).

FIG. 7 is a block diagram of a disk recording / reproducing apparatus for realizing simultaneous recording of two systems of input data. In order to handle two systems of input data, two moving image input units and two disk recording / reproducing processing units are provided (1) and (2), respectively, as compared with the configuration of FIG. That is, the disk recording / reproducing processing means (1) 2 records the program A input from the moving image input unit (1) 4 on the disk A, and records / records the program B input from the moving image input unit (2) 8 on the disk. The processing means (2) 7 records the data on the disk B. FIG. 8 shows the state of the recording operation.
Are sequentially recorded.

[0006]

In the conventional disk recording / reproducing apparatus, the system controller 6 prepares data to be recorded and performs recording control. However, since a recording command from the system control unit is waited for and recorded on the disk medium, the handling of moving image data that is constantly input is greatly affected by the storage capacity that can be secured by the temporary storage unit 1.

Further, since the system control unit needs to perform asynchronous processing such as user interface, program information processing, file system management, etc., it is necessary to record moving image data constantly input to the disk recording / reproducing apparatus. There was a problem that instructions were often delayed.

For these reasons, it has been difficult to ensure real-time performance when data from a moving image input unit that is input in real time is continuously recorded on a disk recording medium.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and realize data recording of a moving image and the like on a disk recording medium while securing real-time properties.

[0010]

According to the present invention, in order to solve the above-mentioned problems and to achieve the object, a disk recording / reproducing processing unit performs a recording operation on a disk recording medium without waiting for an instruction from a system control unit. In this configuration, the function of the actual recording operation is separated from the system control unit.

This makes it easy to secure real-time performance when performing continuous recording on a disk recording medium.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION
Waiting for the disk recording processing unit to accumulate a certain amount of data (for example, 512 kBytes) using the data accumulation amount detection means,
It has a device configuration for processing data of a predetermined size. As a result, the disk recording / reproducing processing unit can perform the data writing process by its own judgment, keep the recording bit rate high, and have the effect that it is easy to ensure real-time data recording.

According to a second aspect of the present invention, the system control unit issues a recording command to the disk recording / reproducing apparatus, activates the moving image input unit, and does not participate in the actual recording. It is only necessary to take charge of processes that occur asynchronously, and the operation of the system control unit can be reduced.

Also, since only the recording start command is issued without being involved in the actual recording, it is not necessary to divide the interface into two, one for command control and the other for recording data input, so that processing can be performed with one interface. It has a possible effect.

The invention according to claim 3 has at least two moving image input units and data storage amount detecting means, and reduces the image quality by reducing the bit rate to half (for example, 2.6 Mbps), so that a fixed amount of data can be obtained. Each time it is stored, two types of moving image data are alternately recorded on one disk recording medium,
It has the effect of recording two programs simultaneously on one disc.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

(Embodiment 1) FIG. 1 is a basic configuration diagram of a disk recording / reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a temporary storage unit.
It is a semiconductor memory such as a RAM. Reference numeral 2 denotes a disk recording / reproducing processing unit, for example, a DVD-RAM drive. A moving image input unit 4 is, for example, an MPEG encoder board. Reference numeral 5 denotes a moving image output unit, for example, M
PEG decoder board. Reference numeral 6 denotes a system control unit, for example, a host personal computer. Reference numeral 9 denotes a data storage amount detecting means, which is composed of, for example, a register for confirming that the input pointer of the DRAM matches the address.

Next, the operation will be described.
The moving image input unit 4 activated by (1) converts analog data such as a TV broadcast into digital data, and transfers the data to the data storage amount detecting means 9. When the data storage amount detecting means 9 to which the input pointer of the DRAM and the pointer indicating the position of the predetermined size are provided as information compare and match the two pointers, the disk recording / reproducing processing means 2
Is notified that a predetermined size (for example, 512 kBytes) has been stored. In response to this, the disk recording / reproducing processing means 2
Predetermined size (512 kByte) from the previous output pointer of RAM
Is recorded on a disk recording medium.

According to this embodiment, the disc recording / reproducing apparatus can detect the presence of recorded data every time a certain amount of data flowing in from the outside is accumulated. Can execute data recording on the disk recording medium. As long as there is data in the temporary storage means, data recording on the disk recording medium can be continued, and it is easy to ensure real-time data recording.

FIG. 2 is a flowchart showing a control procedure for recording a disc in the first embodiment of the present invention. First, the moving image input unit 4 in FIG. 1 is started (S25). With this activation, data input from the moving image input unit 4 to the disk recording / reproduction processing unit 3 is started. Next, a recordable area is designated to the disk recording / reproducing processing unit, and a command is issued to record data (S26). In the above control procedure, the system control unit 6 executes data recording on the disk recording medium only by starting data input and issuing a recording command.

According to the present embodiment, the system control unit does not need to be involved in data recording that requires real-time processing, and performs only the processing that must be performed asynchronously, such as a user interface.

(Embodiment 2) FIG. 3 is a block diagram of a disk recording / reproducing apparatus according to Embodiment 2 of the present invention.
A moving image input unit (2) 8 and a data storage amount detection unit (2) 10 are added to the first embodiment. The disk recording / reproducing processing unit 3 detects the amount of data input from the outside and voluntarily executes data recording on the disk recording medium without external control. By utilizing this characteristic, it is easy to record data input from a plurality of moving image input units (1) 4 and moving image input units (2) 8 on one disk recording medium. That is, simultaneous recording of two programs becomes possible. However, the bit rate from the moving image input section is reduced to about half of the average bit rate recordable by the disk recording / reproducing processing means 2.

FIG. 4 shows a state where two programs are recorded on one disk. The data of the program A input from the moving image input unit 4 (1) detected by the data storage amount detecting means (1) 9 and the data storage amount detecting means 10
FIG. 4A shows a state where the data of the program B input from the moving image input unit (2) 8 detected by (2) is alternately recorded on the disk recording medium. When data is stored at almost the same speed, the data is recorded as shown in FIG.

On the other hand, if the data storage from the two moving image input units 4 and 8 is performed at different speeds, a certain amount of storage is recorded on the disk recording medium each time it is detected. As shown in FIG.

[0025]

As described above, according to the present invention, by providing the data storage amount detection means in the disk recording / reproducing processing unit, the recording operation on the disk recording medium can be performed without waiting for an instruction from the system control unit. As a result, the effect of simplifying the processing of the system control unit and facilitating securing real-time properties when performing continuous recording on a disk recording medium is obtained.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a disk recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart showing a disc recording control procedure according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a disk recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a state diagram in which images of two programs are recorded according to the second embodiment of the present invention.

FIG. 5 is a diagram illustrating a basic configuration of a conventional disk recording / reproducing apparatus.

FIG. 6 is a flowchart showing a control procedure for recording a disc according to the related art.

FIG. 7 is a block diagram of a disk recording / reproducing apparatus for realizing simultaneous recording of a plurality of input data according to the related art.

FIG. 8 is a state diagram in which images of two programs according to the prior art are recorded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temporary storage means 2 Disk recording / reproducing processing means 3 Disk recording / reproducing processing unit 4,8 Moving image input unit 5 Moving image output unit 6 System control unit 9,10 Data storage amount detecting means

Claims (3)

[Claims] 1. Temporary storage means for temporarily storing recording data input from a moving image input unit, data storage amount detection means for detecting that a certain amount of data has been stored in the temporary storage means, and data. A disk recording / reproducing processing unit for recording on a disk recording medium, wherein a predetermined amount of data accumulation is detected by the data storage amount detecting unit in the temporary storage unit, and the disk recording / reproducing processing unit does not receive external control; A disk recording / reproducing apparatus for performing data recording on a disk recording medium at its own discretion. 2. When recording target data on a disk recording / reproducing apparatus, only a recordable area of the disk recording medium and input start of recording data are performed, and a recording destination and a recording length on the disk recording medium are sequentially specified. A recording / reproducing control method for a disk recording / reproducing apparatus, characterized in that the method is not performed. 3. An average bit rate which has at least two moving image input units and a data storage amount detecting means, and which allows a data transfer rate (bit rate) from said moving image input unit to be recorded by a disk recording / reproducing processing means. A disk recording / reproducing apparatus for alternately recording data on one disk recording medium in accordance with the amount of data stored from each moving image input unit.