JP2001326886A - Video recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a video recording and reproducing device having versatility, which is provided with 1st and 2nd storage reproduction means, an image processing encoder and an image processing decoder. SOLUTION: The video recorder is configured such that a 1st storage reproduction device 14, a 2nd storage reproduction device 17, a buffer memory 15, an encoder 11, a decoder 16, and a microcomputer 300 are connected to a bridge 12 and a mixing device 100 and a switcher 400 freely control an input/output of the encoder 11 and the decoder 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a versatile recording / reproducing apparatus using a hard disk or an optical disk (DVD, CD, etc.) as a storage medium of an information storage / reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, semiconductor memories, hard disks,
With the increase in capacity of information recording / reproducing media such as optical disks, recording / reproducing devices (such as disc players, small electronic cameras, video cameras, and personal computer systems) using information recording / reproducing devices have been reduced in size.

Along with this, there are various demands for the above-mentioned recording and reproducing apparatus. For example, simple editing functions and convenience in handling.

[0004]

Conventionally, however, the camera is a camera, the player and the player, and the editing device is configured as a single device as an editing device.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a versatile image storage / reproduction apparatus including first and second storage / reproduction means, an image processing encoder, and an image processing decoder. .

Another object of the present invention is to provide an image storage / reproduction device suitable for real-time recording or mixing.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a bridge serving as a data transfer path,
Buffer means having input / output terminals connected to the bridge,
A first storage / playback unit having an input / output terminal connected to the bridge, a second storage / playback unit having an input / output terminal connected to the bridge, an image processing encoder connected to the bridge, and the bridge A coder for image processing connected to, at least an analog video signal is input to a first input terminal, an analog output terminal of the decoder is connected to a second input terminal, and an analog output terminal for external connection is Mixing means connected to the input end of the encoder, and the control means causes the decoder to decode the video information read from the first storage / reproduction means. Mixing the analog signal from the decoder and the analog video signal from the first input terminal, and the encoder outputs an analog signal from the mixing means. Allowed encode grayed signal, in the second storage playback device is obtained so as allowed to store the output from the encoder.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic configuration of an image storage / reproduction device according to the present invention. The trunk signal device 100 has one input terminal 101.
An analog video signal from the tuner 21, the camera 22, or the external input device 23 can be input to the input terminal 102, and an analog video signal decoded by the decoder 16 is input to the other input terminal 102 via the switcher 400. Can be.

Further, the output of the mixing device 100 can be input to the encoder 11 via the switcher 400, and can also be input to the display 200. The switcher 400 includes an operation input processing unit 31
Microcomputer 300 responding to operation input from
Under the control described above, the output of the charming king device 100 can be supplied to the display 200 and can also be supplied to the encoder 11 at the same time. Further switcher
The 400 can supply the output analog video signal from the decoder 16 to the display 200 or the mixing device 100.

The output of the encoder 11 is output to a bridge 12 using a data bus. In the recording mode, the recording information output from the encoder 11 is
12. First storage / reproduction device 14 via controller 13
And recorded on a hard disk, for example. In this case, the recording information is stored in the buffer memory 15 which is connected to the bridge 12 once.
5 to the first storage / reproduction device 14.

When the first storage / reproduction device 14 is in the reproduction mode,
When the second storage / reproduction device 17 is in the recording mode, the reproduction information reproduced by the first storage / reproduction device 14
3. Once supplied to the decoder 16 via the bridge 12, it is decoded here. The decoded analog video signal is input to the input terminal 101 of the mixing device 100 via the switcher 400, and then output from the mixing device 100 and input to the encoder 11 via the switcher 400.

The digital video information output from the encoder 11 is temporarily stored in the buffer memory 15 via the bridge 12. Then, the video information read from the buffer memory 15 is transferred to the second storage / playback device 17 via the bridge 12 and the controller 18 by using, for example, an optical
W-DVD).

The microcomputer 300 controls each block of the whole apparatus. In accordance with an operation input given to the operation input processing section 31, a microcomputer 300 includes a recording mode, a reproducing mode, a recording and reproducing mode, and an editing mode. Set.

FIG. 2 shows the operation in the recording mode in which the video signal from the tuner 21, the camera 22, or the external input device 23 is recorded on the hard disk of the first storage / reproduction device 14.

An analog video signal from the input terminal 101 of the mixing device 100 is input via a switcher 400
It is input to the encoder 11 (steps S1, S2).
The encoder 11 converts an analog signal into a digital signal,
The data is compressed into a predetermined format and output to the bridge 12 (step S2). The compression format is, for example, MPE
This is the G method. This output is temporarily stored in the buffer memory 15. Here, the amount of data stored in the buffer memory 12 is monitored (step S3). If the memory has sufficient storage capacity, recording to the buffer memory 15 is continued, and at the same time, data is read from the buffer memory 15. The information is recorded on the hard disk in the first storage / reproduction device 14 (step S5).

Then, when the input signal to the mixing apparatus 100 ends or a stop operation signal is input (step S).
6), the recording process ends (step S7). When the data held in the buffer memory 15 becomes full (a certain upper limit of data amount) in step S3, the data compression ratio of the encoder 11 is changed (for example, the compression ratio (1 / N)).
Becomes smaller and the data amount becomes smaller), and step S
Go to 5.

The above flow chart is designed to first record all input signals from the outside on a hard disk. Therefore, the recording operation is not interrupted. In the above example, the example in which the compression rate of the encoder 11 is reduced has been described. However, the lower limit of the data amount of the buffer memory 15 is also monitored, and the data compression ratio (1 / N) is increased (the data amount is large and the resolution is good). Direction)
It is a matter of course that a routine for controlling the control may be added.

FIG. 3 is a flowchart showing the operation when the mixing mode is set.

In the mixing mode, the video input to the input terminal 101 of the mixing device 100 and the input terminal 10
The user can set the occupation ratio on the screen with respect to the video to be input to step 2 (steps A1 and A2).

Next, the first storage / reproduction device 14 is set to the reproduction state (step A3). The information reproduced by the device 14 is input to a decoder 16 via a controller 13 and a bridge 12, and is decoded. The decoded output is input to the mixing device 100 via the input terminal 102 via the switcher 400. Mixing device 10
At 0, an external video signal is supplied to the input terminal 101 side. The composite output video signal from the mixing device 100 is input to the encoder 11 via the switcher 400 and encoded (steps A4, A5, A).
6).

The encoded video information is transmitted to the bridge 1
2 is temporarily stored in the buffer memory 15. At the same time, the read information from the buffer memory 15 is recorded on the optical disk of the second recording / reproducing device 17 via the controller 18.

Here, the state of the data amount in the buffer memory 15 is constantly monitored. Then, the buffer memory 15
Is full (a certain amount of data), the data compression ratio of the encoder 11 is changed (for example, the compression ratio (1 / N) is reduced and the data amount is reduced) (step A9), and the process proceeds to step A8. I do. If there is enough capacity for the amount of data stored in the buffer memory 15, the process proceeds from step A7 to A8, and the recording by the second recording / reproducing device 17 is continued.

If the input signal is terminated or there is an operation input for stopping, the mixing process is terminated (step A1).
0).

FIG. 4 is a diagram showing the information stored in the hard disk of the first storage / reproduction device 14 and
In the case of rewriting the optical disk of FIG.

The first storage / reproduction device 14 is set to the reproduction state. The video information read from the hard disk of the first storage / reproduction device 14 (steps B1 and B2) is input to the decoder 16 via the controller 13 and the bridge 12. The decoder 16 decodes the video information (step B3), and the decoded video signal is supplied to the mixing device 10 via the switcher 400.
0 is input to the input terminal 102 (step B4). The video signal that has passed through the mixing device 100 is
Input to the encoder 11 via 400. The encoder 400 performs image compression processing in a predetermined format (step B5) and outputs the result to the bridge 12.

The video information output to the bridge 12 is temporarily stored in the buffer memory 15. Then, the data is sequentially read from the oldest data and input to the controller 18 via the bridge 12. The video information input to the controller 18 is recorded on the optical disk of the second storage / playback device 17.

Here, the amount of data stored in the buffer memory 15 is always monitored (step B6), and when approaching a preset upper limit, the compression ratio in the encoder 11 is varied (step B8), The data is compressed and recorded in the direction of decreasing the amount (step B8).
If the amount of data in the buffer memory 15 is small, recording on the optical disc is performed in the second storage / reproducing device 17 (step B8). When the input signal ends (the reading of the first storage / reproduction device ends or the operation input ends) (step B9), the copying process ends. If the input signal has not ended, the process returns to step B2.

In the rewrite mode, the user can monitor the image being transcribed while looking at the display 200. This image signal is output from the mixing device 400 via the switcher 400. The display 200 is sent to the display 200.

In the above description, recording, reproduction, and mixing of video information have been described. However, audio information is encoded and packetized once, and after being associated with a corresponding video packet, it is always associated with the video packet. Is transferred. Therefore, when the corresponding video packet is deleted, the corresponding audio packet is also deleted.

In the above description, the control means, which is a microcomputer, monitors the upper limit and the lower limit of the amount of data stored in the buffer memory 15, and changes the compression ratio when the upper limit is reached. However, the present invention is not limited to this. The reading speed of the first or second storage / reproducing device during reading may be varied.

FIG. 5 shows a configuration example of a transport stream in the bridge 12. Inside the bridge,
Packets read from the storage / reproduction device, packets to be recorded from now on, and packets input / output to / from the buffer memory are mixed. These packets exist in a time division manner. To manage such various packets,
The management packet mp exists. This management packet mp
Has a specific packet ID attached to its packet header. The management packet mp contains information of the packet that follows, and indicates what packets are included in what order. In the example shown in the figure, the video packet (v
1), video packet (v2), video packet (v
3), the audio packet (a1), and the audio packet (a2) in this order. The packet header of each packet contains a packet ID, and can identify video, audio, data, and the like. Therefore, in the example shown in the figure, V1, V2, V
3, A1 and A2 are sequentially described in each packet header.

The microcomputer 300 first reads the management packet mp, recognizes what kind of packet the subsequent packet is, and determines whether or not to perform image compression processing, decoding processing, and the like. Further, in this case, although not shown, the packet ID indicates which recording / reproducing apparatus has been read from the buffer memory 1.
5 also includes information indicating whether the packet is an input packet or a packet output from the buffer memory 15. If the packet is output from the coder 16, the identification information is also included.

The present invention is not limited to the above-described embodiment. It is also possible to add third and fourth recording / reproducing means, and to additionally provide an encoder and a decoder. Of course.

[0035]

As described above, according to the present invention,
It is possible to provide a variety of image storage / reproduction devices including first and second storage / reproduction means, an image processing encoder, and an image processing decoder.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an image storage / reproduction device according to the present invention.

FIG. 2 is a flowchart for explaining an operation example of the image storage / reproduction device of the present invention.

FIG. 3 is a flowchart illustrating another operation example of the image storage / reproduction device of the present invention.

FIG. 4 is a flowchart for explaining still another operation example of the image storage / reproduction device of the present invention.

FIG. 5 is an explanatory diagram showing an example of a transport stream in a bridge.

[Explanation of symbols]

11 encoder, 12 bridge, 13 controller, 14 first storage / reproduction device, 15 buffer memory, 16 decoder, 17 second storage / reproduction device, 18
... Controller, 21 ... Tuner, 22 ... Camera, 23
... external input device, 31 ... operation input processing unit, 100 ... mixing device, 200 ... display, 400 ... switcher.

Continued on the front page F term (reference) 5C023 AA11 AA34 AA35 AA37 BA11 CA03 EA02 5C053 FA06 FA14 FA22 FA23 GA11 GB11 GB28 GB37 JA05 KA24 KA25 LA01 LA07 5D044 AB05 AB07 BC01 BC06 CC04 FG23 HL11 HL14

Claims (6)

[Claims] A bridge serving as a data transfer path, buffer means having an input / output terminal connected to the bridge, first storage / reproduction means having an input / output terminal connected to the bridge, A second storage / reproducing means connected to the input / output terminal, an image processing encoder connected to the bridge, an image processing coder connected to the bridge, and at least an analog video signal connected to the first input terminal. A mixing means having an analog output terminal of the decoder connected to a second input terminal, an analog output terminal for external connection provided, and an output terminal connected to the input terminal of the encoder; The decoder decodes the video information read from the first storage / reproduction means, and the mixing means outputs an analog signal from the decoder and an analog signal from the first input terminal. And the analog video signal, the encoder encodes the output analog signal of the mixing means, and temporarily stores the encoded output in the buffer means via the bridge. A recording / reproducing apparatus comprising: a control unit for storing an output from the buffer unit via the bridge. 2. The recording / reproducing apparatus according to claim 1, wherein an upper limit and a lower limit for temporarily storing an output from the encoder are set in the buffer unit. 3. The method according to claim 2, wherein the control unit monitors a data amount stored in the buffer unit, and includes a unit that changes a data compression ratio of the encoder when the data amount reaches a preset upper limit. 3. The recording / reproducing apparatus according to claim 2, wherein: 4. A bridge serving as a data transfer path, a buffer unit having an input / output terminal connected to the bridge, a first storage / reproducing unit having an input / output terminal connected to the bridge, A second storage / reproducing unit connected to the input / output terminal, an image processing encoder connected to the bridge, an image processing decoder connected to the bridge, and at least an analog video signal connected to the first input terminal. A mixing unit having an analog output terminal of the decoder connected to a second input terminal thereof, an analog output terminal for external connection provided, and an output terminal connected to an input terminal of the encoder; The video information read from the storage / reproduction means or the second storage / reproduction means is decoded by the decoder, and input to the decoder via the mixing means. The decoder output is input to the encoder capable of changing the image compression ratio, the encoder output is temporarily stored in the buffer means via the bridge, and the output of the buffer means is output via the bridge. A recording / reproducing apparatus, comprising: a control unit for causing one of the second storage / reproducing unit and the first storage / reproducing unit to store the data. 5. The method according to claim 1, wherein the control unit monitors a data amount stored in the buffer unit, and includes a unit that varies a data compression ratio of the encoder when the data amount reaches a preset upper limit. The recording / reproducing apparatus according to claim 4, characterized in that: 6. The control means monitors the amount of data stored in the buffer means, and when the data amount reaches a preset upper limit, the first storage / reproduction means or the second storage means during data reading. 5. The recording / reproducing apparatus according to claim 4, further comprising means for variably controlling a read speed of said storage / reproducing means.