JP2002209174A - Display device and picture recording and reproducing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly perform picture recording with the just timing at picture recording and to prevent a break in picture recording. SOLUTION: When a user wants to quickly record a picture, storage processing to a first information storage means is controlled in accordance with the detection result of the start state of the information device side though a power source or a program on the information device side is not started or a data communication line is disconnected in the middle of picture recording. Thus, when data is stored on the display device side till the information device side enters into the start state, the picture which the user want to record is quickly recorded at the just timing and a break in recording data is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal computer (hereinafter referred to as P) capable of capturing and recording image data.
C) and a display device such as a liquid crystal display monitor capable of displaying image data from the information device on a screen and also displaying a television (hereinafter referred to as TV) image. The present invention relates to a recording / playback system used.

[0002]

2. Description of the Related Art Conventionally, as a recording / playback system, a TV tuner is built in a monitor device, connected to the PC side, and an image compression / decompression program is installed on the PC side. , Receiving the TV reception video signal on the monitor device side, transmitting the TV reception video signal to the PC side, performing data compression processing, and further compressing the compressed data into a built-in hard disk device (hereinafter referred to as HDD). ).

[0003]

In the above-mentioned conventional configuration,
When the user wants to record quickly, if the PC reads the OS and the application program and does not start, the recording cannot be performed at just timing because the recording HDD is provided on the PC.
Further, when the data communication line connected between the monitor device and the PC is accidentally disconnected during recording, there is a possibility that the recorded data is interrupted on the way and ruined.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a display device capable of recording at a just timing at the time of recording and preventing interruption during recording, and a recording / reproducing system using the same. The purpose is to provide.

[0005]

A display device according to the present invention comprises: a TV receiver for selecting and receiving a television signal; a data compressor for compressing the television signal;
A first information storage unit that can store data for a time required for activation of the information device, a first data communication unit that performs data communication with the information device, and information via the first data communication unit. An activation state detection unit for detecting an activation state of the device; and a storage control unit for controlling a storage process in the first information storage unit in accordance with a detection result by the activation state detection unit. The compressed data from the data compression means, including the stored compressed data, is transmitted to the information device via the first data communication means, thereby achieving the above object.

[0006] With this configuration, when the user wants to quickly record, even if the power supply or the program on the information device side is not activated or the data communication line is disconnected during the recording, the information device can be used. Since the storage process in the first information storage means is controlled according to the detection result of the activation state of the information device, if the activation state of the information device cannot be detected, the data may be stored on the display device side. It is possible to quickly record a video to be recorded at just timing, and to prevent interruption of recorded data.

Preferably, in the display device of the present invention, there is provided recording instruction means for instructing recording, and the storage control means, when a recording instruction is issued by the recording instruction means, the power activation state detecting means is provided on the information device side. Only when it is not possible to detect the activation state, the compressed data from the data compression means is stored and processed in the first information storage means.

With this configuration, if the user issues a recording instruction quickly, the start-up state of the information device is changed, for example, when the power supply or the program on the information device is not started or when the data communication line is disconnected during recording. Only if we ca n’t detect it,
Since the display device temporarily stores the data until the information device can detect the start-up state, it is possible to quickly record the video that the user wants to record at the just timing and also prevent interruption of the recorded data. Become.

Further, preferably, the storage control means in the display device of the present invention stops the processing of storing the compressed data in the first information storage means when the power supply activation state detection means detects the activation state of the information device. Then, the compressed data from the data compression unit, including the compressed data stored in the first information storage unit, can be transmitted to the information device via the first data communication unit.

Preferably, the storage control means in the display device of the present invention stops the processing of storing the compressed data in the first information storage means when the storage limit of the data storage capacity of the first information storage means is reached. Then, the compressed data from the data compression unit, including the compressed data stored in the first information storage unit, can be transmitted to the information device via the first data communication unit.

Further, preferably, in the display device of the present invention, the detection of the start-up state of the information device includes the detection of a recordable state (and a non-recordable state) when the information device is powered on and a recordable state at the time of recording. (And recording disabled)
At least one of the detections.

Further, the recording / reproducing system of the present invention comprises:
An information device, comprising: the display device according to any one of claims 1 to 5, wherein at least one of display data and a television reception signal from the information device can be displayed on a display screen. Second information storage means for storing the compressed data from the display device, decompression means for reproducing the compressed data from the second information storage means and decompressing the data before compression, and displaying the data decompressed by the decompression means on the display device And a second data communication means that enables transmission.
Thereby, the above object is achieved. Preferably, in the recording / playback system according to the present invention, after recording is completed, data obtained by continuously connecting recorded data stored in the first information storage means and other recorded data at the time of detection of an unrecordable state. And a data creating unit for creating the data.

With this configuration, in the recording / playback system according to the present invention, the data stored in the first information storage means and the other recorded data at the time of detection of recording failure are connected to form continuous data. It becomes possible to record and reproduce the recorded data and display it without discomfort.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a recording / playback system according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an external configuration of a recording / playback system according to an embodiment of the present invention, and FIG. 2 is a sectional view of the computer display terminal device of FIG. 1 and 2, a recording / reproducing system 10 includes a computer main body 20 as an information device, a monitor device 30 as a computer display terminal device, and a computer main body 2
0 and a computer signal cable 40 for data communication connected between the monitor device 30.

The computer main body 20 is composed of one independent housing, and is driven by an independent power supply device (not shown).
Various data processing, the Internet, e-mail, application programs such as image editing are stored in advance, in addition to this, a recording processing program and a recording and playback processing program of the present invention described in detail later Installed.

The monitor device 30 is composed of a single independent housing, is driven by a power supply device (not shown) independent of the computer main body 20, and has a liquid crystal display panel 31 as display means, Monitor control device 32
And an input device 35 as input operation means.

The liquid crystal display panel 31 includes an image display section having a backlight unit 311 and a TFT liquid crystal display unit (not shown) described later with reference to FIG.
6, the operability of the viewing angle is improved by being pivotally supported up and down with respect to the stand 37.

The monitor control device 32 includes a control board unit for recording control, recording and reproduction control, TV viewing control, and power supply management.

The input device 35 is composed of a remote controller (not shown) capable of inputting various operation commands, an operation panel 33, a mouse 34, and the like. A TV channel change instruction for selecting a TV receiving station and a TV display are provided. And a function to display a PC signal, to switch the display, and to perform a recording instruction to instruct recording.

The operation panel 33 is provided with a channel selection button of the TV receiver, a volume button, an AV peripheral device selection button, a display environment setting button, a recording instruction button (recording instruction means), a remote control receiver (not shown), and the like. Have been.

The computer signal cable 40 is connected to a DS
An analog RGB display data signal cable connecting between UB connectors, an audio signal cable connecting between audio connectors, and a USB (Universal Serial Bus).
s; Universal serial bus) port (USB hub)
And a USB cable for connection between them.

FIG. 3 is a block diagram showing a hardware configuration of a main part of the recording / playback system of FIG. In FIG. 3, a USB I / F (USB interface) 21 of the computer main body 20 and a USB I / F 320 of the monitor control device 32 are provided.
The compressed data for video recording is transmitted from the monitor control device 32 to the computer main body 20, for example. The display RGB I / F 22 of the computer main body 20 is connected to the A / D conversion device 321 of the monitor control device 32, and the display data obtained by decompressing the recorded data is transmitted to the A / D conversion device 321.

Although not shown in detail, the computer main body 20 includes a CPU module, a display controller, a VRAM, a modem for communication, and a PCI (Peripheral).
pheralComponent Interconnect) interface,
I / O controller and second enabling recording information to be stored
HDD 23 as information storage means (readable recording medium);
It has a BIOS-ROM, a key controller, and an audio controller for outputting audio information from an audio output terminal and reproducing the audio on the monitor device 30.

The CPU module is computer control means for executing operation control and data processing of the entire system.

The HDD 23 is used as a main storage unit of the system, and is used in each process to be described later in the HDD 23 and the MPI via the USB I / Fs 21 and 320.
An operating system (OS) 24 for managing access to devices such as the EG2 encoder 327, an application program to be processed, and user data created by the application program are stored. As one of the application programs, a recording processing program and a recording / reproduction processing program for realizing the present invention include:
It is installed in the main memory (HDD 23). Also,
The recording processing program includes a recording management process 25 such as recording reservation and recording reservation processing (recording setting processing) for executing the recording reservation. The recording management process 25
Recorded recording information, such as recording start date and time,
It has a recording information table that stores recording end date and time, channel information, recording density information corresponding to the compression rate, management information, and the like. The recording management process 25
Can be set at the time of recording reservation by using program information including program content distributed via the Internet, and the association between the program information and management information is also stored. The recording / reproducing processing program in the main memory (HDD 23) and the CPU module constitute a decompression means for restoring compressed data. Incidentally, there is a method of incorporating an MPEG2 decoder controller as a decompression means constituted by hardware as a peripheral device. In this case, however, the application program includes M
No PEG2 decoder is required.

This recording processing program has a GUI (Graph
a step of detecting an operation command for selecting a receiving station, recording, and recording reservation (operation command detection means) using a graphical user interface (Hical User Interface); A step of transmitting a command (recording setting information transmission) to the monitor device 30 via the USB device (second data communication means); and transmitting video information compressed in the MPEG2 format input from the monitor device 30 via the USB to the HDD 23 sequentially. (Second storage control means), after the recording is completed, the recorded data stored in the HDD 23 (second information storage means) after being stored in the first information storage means (to be described later) of the monitor device 30; HDD2 without using information storage means
3 (second information storage means) and a step (data creation means) of creating data by continuously connecting the recorded data to the recorded data.

The recording / playback processing program is a GUI
Detecting an operation command for recording / playback by using an operation command (operation command detection means);
The video information of the compressed data stored in the MPEG2
A step of decompressing the original data by the decoder process 26 (decompression means), and transmitting and outputting the decompressed display data to the monitor device 30 as the original display data;
Transmitting the audio data from the audio output terminal (second data communication means). Note that P
As display data output from C, it is natural to output display data of ordinary word processing, spreadsheet processing, and graphic processing, and these data are combined with reproduced video data (picture-in-picture). It is natural that the output can be made.

The display controller performs display control processing for outputting the data drawn in the VRAM as analog RGB display data and displaying the data on the monitor device 30 side.

The PCI interface includes an HDD 2
3, a control unit such as a CD-ROM drive and an FDD drive, and a USB device controller connected to a USB slot are included.

The I / O controller is for controlling various I / O devices.

Next, the monitor control device 32 controls the display RGB
An A / D converter 321 to which display data is input from an I / F (I / F indicates an interface), a graphic controller 322, an LCD driver 323, an inverter 324 for a backlight unit 311;
A TV tuner 325 as a V receiving means, a video decoder 326, and an MPEG (Mort
ion Picture ExpertGroup (enpeg) 2 encoder 327 and USB I / F 320 as data communication means
A first information storage unit 328, a control unit 330 for controlling each unit, and a memory 3 as an information storage unit storing data used when the control unit 330 controls each unit.
29.

The USB I / F 320 transmits compressed data from the MPEG2 encoder 327 to a PC as an information device, and allows the PC to specify a capture size, a bit rate, and the like.

The A / D converter 321 converts an analog RGB signal, which is display data from a PC, into a digital RGB signal.

The graphic controller 322 converts the input digital image signal so that it can be displayed in accordance with the number of display pixels of the liquid crystal display panel 31, and includes a color space conversion function, IP (Interlace to Progressive) conversion,
It has a scaling function, an FRC (Frame Rate Conversion) function, a γ correction function, a color correction function, and a synchronization detection function, and displays data generated from digital RGB signals and digital YUV video signals on a 16-bit display data bus 3.
22a.

The LCD driver 323 is a drive circuit that inputs output display data of the graphic controller 322 and controls image display on the liquid crystal display panel 31. The LCD driver 323 and the graphic controller 32
2 constitute a display control means.

The inverter 324 controls lighting of the backlight unit 311.

The TV tuner 325 is based on channel selection information of a TV receiving station from the computer main body 20 (PC) or channel setting information in response to channel selection information from a channel selecting operation means (input device 35) such as a remote controller. In addition, channel selection control of a receiving station is executed by the control means 330 described later via the IIC bus 330a. Further, the TV tuner 325 is connected to an antenna terminal, a desired TV signal from the antenna terminal is selected and received by channel selection control, an NTSC image signal is detected and output from the TV reception signal, and a signal line 325a is output. Video decoder 326 via
Is to be supplied to In addition, the TV tuner 325
An audio frequency signal is separated and output from the TV reception signal, and the audio frequency signal is converted to an audio processing circuit (not shown) to be described later.
Is to be supplied to

The video decoder 326 is a TV tuner 3
25, and a video signal from a video input terminal to which an external video device is connected (not shown).
To output a YUV digital video signal. The video decoder 326 includes a filter circuit, a sync separation circuit, a YC separation circuit, an A / D converter circuit, a color information adjustment circuit, an AGC circuit, a color decoder circuit, a horizontal / vertical synchronization circuit, and a desired image size determination. And the like. The video decoder 326
Is transmitted through a signal line 326 by arbitration between the MPEG2 encoder 327 and the graphic controller 322.
a and 326b, the output of the YUV digital video signal can be controlled independently, and the scaling process of the image size can be performed independently.

The MPEG2 encoder 327 performs data compression on an input NTSC image signal in a known MPEG2 format, and also performs data compression on a digitized audio signal.

The first information storage means 328 is capable of storing a data capacity corresponding to the time required for powering up the PC and activating the program. Specifically, the first information storage unit 328 is configured by an internal storage buffer, and the internal storage buffer is a buffer configured by a plurality of packet buffers, and is stored on the RAM of the monitor device 30.
With a storage capacity of about 300 packet buffers, TV
It has a storage capacity capable of storing about 5 minutes of video.

The control means 330 is constituted by a CPU (Central Processing Unit).
Based on the control program therein, RGB color adjustment is performed on the A / D converter 321 via the IIC bus 330a, drive control is performed on the LCD driver 323, and the backlight unit 3 is controlled on the inverter 324.
11, performs a tuning operation on the TV tuner 325, performs various controls such as color adjustment on the video decoder 326, and controls the graphic controller 322 via the 16-bit data bus 330 b.
To the input device 35.
The controller reads an instruction to switch between TV display and PC signal display, an instruction to change the channel of the TV, and other operation instructions, and controls each unit according to the instruction.
27 is controlled so as to instruct encoding, and overall control is performed so as to read and write data to and from the memory 329.

In particular, the control means 330 determines the receiving station in response to the tuning information of the TV receiving station from the PC based on the control program, and selects the tuning for the TV tuner 325. The data communication between the means 330A and the PC, for example, a data communication means 330B (first data communication means) for receiving recording command information and the like from the PC, and a start state of the PC side via the data communication means 330B. The activation state detection means 330C to be detected and the first information storage means 3 according to the detection result by the power activation state detection means 330C.
And a storage control means 330D for controlling the storage processing in the storage 28.

The storage control means 330D, when instructing recording,
Only when the power supply activation state detecting means 330C cannot detect the activation state on the PC side, the MPE is stored in the first information storage means 328.
This is for storing and controlling the compressed data from the G2 encoder 327. Further, when the power activation state detection means 330C detects the activation state of the PC, the storage control means 330D stops the processing of storing the compressed data in the first information storage means 328, and stores the compressed data from the data compression means. USBI
/ F320. Further, the storage control means 330D stops the processing of storing the compressed data in the first information storage means 328 at the storage limit of the data storage capacity of the first information storage means 328, and creates continuous recorded data on the PC side. The compressed data in the first information storage means 328 is transmitted to the PC side for the purpose. In this case, the detection of the activation state of the PC includes the detection of the recordable state after the power supply of the PC is started, and the transition from the recording impossible state to the recordable state by the power-on state detection means 330C again after the PC starts recording. Detection.

The memory 329 stores a control program for operating the control means 330 and various data. As the control program, the TV tuner 325
Tuner management process (not shown) that performs channel selection, etc.
A power supply management process for managing power supply / stop to each unit and each device, a screen display switching process for switching between TV display and PC signal display, and a message on the liquid crystal display panel 31
OSD display process, information device status reading process for reading the operating status of the PC, and recording management information
C, a recording management information processing process for performing editing, holding and transmission processes, a startup status detection process for detecting a startup status on the PC side, and a storage process for the first information storage unit 328 according to the startup status detection result. It has a storage control process for controlling.

In the audio reproduction processing, the audio processing circuit outputs an analog audio signal after D / A conversion of the audio signal from the audio input terminal to the audio controller, and the audio controller performs sound quality / volume adjustment, The analog audio signal after performing the surround control or the like is output to an amplifier circuit, and the amplified analog audio signal is output to a speaker. Further, the audio processing circuit is connected to the TV tuner 325, and in addition to the above configuration, the TV tuner 32
5 is A / D converted and further demodulated, and the digitized audio signal is MPEG2
The audio signal supplied to the encoder 327 and A / D converted is D / A converted and supplied to the audio controller. Note that the audio processing circuit performs an arbitration process between the MPEG2 encoder 327 and the graphic controller 322 to output an audio signal from an audio input terminal and a T
An output to the MPEG2 encoder 327 and an output to the audio controller are selectively switched with respect to each of the audio signals from the V tuner 325 to enable simultaneous processing of both signals.

The operation of the above configuration will be described below. Here, first, a brief description of the operations at the time of watching / listening to a TV, at the time of recording, at the time of recording / playback, and at the time of recording reservation will be given. This will be described in detail with reference to FIG.

At the time of TV reception, the TV tuner 325
A TV signal of a desired reception channel is selected based on the channel setting signal, and the video decoder 326 selects NT signal.
The SC image signal is converted into a digital image signal, further converted into display data by the graphic controller 322, displayed on the display screen of the liquid crystal display panel 31, and the user watches TV.

Next, at the time of recording, the TV
The TV tuner 325 is tuned to a desired reception channel based on the activation of the recording processing program or the recording instruction from the input device 35, and the video decoder 32
6, the digital image signal is data-compressed by the MPEG2 encoder 327, and the compressed data is stored in the first information storage unit 328 when the start-up state of the PC cannot be detected.
After storing and processing the compressed data from the PEG2 encoder 327, the compressed data from the MPEG2 encoder 327 is transmitted to the PC side from the USB I / F 320 when the activation state on the PC side is detected.
8 and transmitted to the PC side from the USB I / F 320.

Further, on the PC side, the USB I / F
The compressed data input via the PC 21 is sequentially stored in the HDD 23 in the PC together with desired attribute information. After the end of the recording, once stored in the first information storage unit 328,
The recording data stored in the DD 23 (second information storage means) and the recording data stored in the HDD 23 without going through the first information storage means 328 are continuously connected to create data and stored in the HDD 23.

Next, at the time of recording and playback, the TV
Based on the activation of the recording / playback processing program, the M
The PEG2 decoding program (or MPEG2 decoder circuit) sequentially calls and decompresses the connected compressed data stored in the HDD 23 as described above, and further decompresses audio data by the MPEG1 decoding program or MPEG1 decoder circuit. It is processed. Note that the decompression processing of audio data is not limited to this, and the MPEG2 decoding program or MP
Decompression processing of audio data is also possible by the EG2 decoder circuit. In this embodiment, in order to improve the sound quality, MP
An EG1 decode program or an MPEG1 decoder circuit is used.

The decompressed analog RGB display data is transferred from the display RGB I / F 22 to the A /
The image is displayed on the display screen of the liquid crystal display panel 31 via the D conversion device 321 and the graphic controller 322. Similarly, the audio data is input to an audio input terminal (not shown) on the monitor device 30 side, and is output through a predetermined circuit from a speaker in synchronization with a display image.

Next, when making a recording reservation, the monitor device 3 is set based on a TV recording processing program in the PC.
In conjunction with the GUI information displayed at 0, recording setting information such as recording start / end time, recording channel, recording density, etc. is input and set, and the recording is stored in the HDD 23 in the recording management process in the PC. Set information such as recording start / end time, recording channel, recording density, etc.
Stored in the recording management process. The above-described recording process is started by arbitration between the monitor device 30 and the PC according to the recording information.

That is, when the recording start time comes, the monitor device 3 according to the recording setting information of the recording reservation until the recording end time.
0 and the computer main body 20 (PC), the control means 330 controls the TV tuner 325 to select a recording channel, and the MPEG2 encoder 327
, The TV tuner 325, the video decoder 326, the MPEG2 encoder 327, and the USB I / F 320 are activated to perform a recording process.

Here, regarding the characteristic portion of the present invention, a flow 1 (FIG. 4) showing the operation of the alternative recording process by the monitor device.
And FIG. 5), a flow 2 (FIG. 6) showing a processing operation on the PC side for this alternative recording processing operation, and a flow 3 (FIGS. 7 and 8) showing a stop operation and a re-operation of the alternative recording processing by the monitor device. Flow 4 (FIGS. 9 to 11) showing the switching operation at the storage limit in the alternative recording process, and Flow 5 (FIGS. 12 to 14) showing the switching operation when the storage limit of the alternative recording process is reached. This will be described in detail sequentially with reference to FIG.

FIGS. 4 and 5 are flowcharts showing in detail the operation of the alternative recording process by the monitor device of FIG.

As shown in FIG. 4, first, the monitor 30
The side performs an event check until an event occurs (steps S101 and S102), and if there is an event, checks whether it is a recording start event (step S103). If the event is not a recording start event, another event process is performed (step S125), and the process returns to the event check again (A).

Next, if it is a recording start event,
It is checked whether or not the PC can record (startup state). First, a write start signal is transmitted to the PC (step S104). The timer counter is reset (step S105), and an attempt is made to receive an approval signal issued from the PC side (step S106). Timer counter is M
Unless the approval signal is received from the PC before the AX value is reached
(Steps S107 and S108), it is determined that the PC cannot record video (Step S109). If the approval signal has been received from the PC by then, the mode is determined to be the recording mode on the PC (step S126). The timer counter is a variable for determining a time-out error when communicating with the PC.
It is stored in M, and 0 is stored as an initial value. Also,
The MAX value of the timer counter is a fixed value when the timer counter determines a timeout error, and is stored in the ROM of the monitor device 30, for example, a value corresponding to about 30 seconds.

Further, after judging the state of the PC as described above, the actual recording process is started. First, frame data is created from the data (one frame) received from the TV tuner 325, and is used as reference frame data (step S110). Next, a packet buffer is newly opened to obtain a packet buffer pointer (step S11).
1). The created frame data is written at the position of the packet buffer pointer, and after updating the packet buffer pointer (step S112), the frame counter is reset (step S113). Thus, reference frame data is created on the packet buffer. Note that the frame data is image data of one frame of the image data transmitted from the TV tuner 325 at 30 frames per second, and is stored in the RAM of the monitor device 30 and is RGB.
8 bits for each color, 525 dots vertically × 720 dots horizontally × RG
B3 colors × 8 bits / color = compressed original data of about 1.1 Mbytes and stored. The reference frame data is a name of the frame data arranged at the head of the packet buffer. Further, the frame counter indicates the number of difference data stored in the packet buffer, is stored in the RAM of the monitor device 30, and is stored with 0 as an initial value every time reference frame data is determined.
Further, the packet buffer is a buffer in which recorded data is stored in a reproducible state, and is composed of one reference frame data and a plurality of difference data. It has a storage capacity that can store about one second. The packet buffer pointer is a pointer for specifying an access point in the packet buffer.
It is stored in the AM, and when the packet buffer is opened, the head position of the buffer is stored.

Subsequently, as shown in FIG. 5, frame data is created from the data (one frame) received from the TV tuner 325 (step S114), and the difference between the created frame data and the reference frame data is extracted. The difference data is created (Step S115). If the created difference data can be added to the packet buffer (step S116), the difference data is written at the position of the packet buffer pointer, the packet buffer pointer is updated (step S117), and the frame counter is incremented (step S118). ). It is determined whether the value of the frame counter becomes the MAX value (step S119). Until the difference data cannot be stored in the packet buffer (step S116), the difference data is created and written into the packet buffer (step S1).
14 to S119) are repeated. The difference data is
This is data obtained by extracting and compressing the difference between one frame of image data transmitted at 30 frames per second from the TV tuner 325 and the reference frame data, and is stored in the RAM of the monitor device 30. The frame counter MAX value is the maximum value of the number of difference data that can be stored in the packet buffer.
It is stored in the ROM of the display device. In order to have about 1 second as a packet buffer, it has 29 as a value. Therefore, reference frame (1/30 second) +30 frames per second × 29 = 1 second.

Further, it is determined whether or not the difference data does not fit in the packet buffer (step S116).
When the value of the frame counter reaches MAX (step S119), if the mode is not the recording mode on the PC side (step S120), recording is performed in the internal storage buffer (first information storage unit 328). If the internal storage buffer has not been opened (step S12
1) The internal storage buffer is newly opened to obtain an internal storage buffer pointer (step S122). In addition,
The internal storage buffer pointer is a pointer for specifying an access point in the internal storage buffer, and is arranged on the RAM of the monitor device 30 so that the head position of the buffer is stored when the internal storage buffer is opened. It has become.

Subsequently, the contents of the packet buffer are written at the position of the internal storage buffer pointer, and after updating the internal storage buffer pointer (step S123), the packet buffer is closed (step S124), and the next reference frame is created. The process is repeated (B).

In the case of a mode in which recording can be performed on the PC side,
(Step S120), the contents of the packet buffer are stored in the PC
And the packet buffer is closed (step S127).

FIG. 6 is a flowchart showing in detail the processing operation on the PC side for the alternative recording processing by the monitor device of FIG.

As shown in FIG. 6, in the processing on the PC side, first, an event check is performed until an event occurs (steps S201 and S202). If there is an event, whether or not it is a write start signal from the monitor device 30 is determined. Is checked (step S203). If it is a write start signal from the monitor device 30, the recording management software is activated (steps S210 and S211). If the recording management software is activated (step S212), an approval signal is transmitted to the monitor device 30 side. (Step S21
3), the process returns to the event check in step S201 again (P). Thus, when the recording management software cannot be started for some reason or when the power of the PC is not turned on, the approval signal is not transmitted to the monitor device 30 side.

Next, when the content of the event is a data transfer from the monitor device 30 (step S204), if the recording data file has not been opened yet (step S214), the recording data file is newly opened and recorded. A seek pointer is obtained (step S215).
At this time, if the recording data file has already been opened, the recording is already being performed, and the existing recording seek pointer is used. Further, the data transferred from the monitor device 30 is written at the position of the recording seek pointer, and the recording seek pointer is updated (step S216), and then the process returns to the event check of step S201 again (P). Thereby, the recording data can be sequentially stored in the recording data file on the PC side. The recording data file is a file in which the recording data is stored in a reproducible state, and is stored on a storage medium (HD or the like) of the PC. The recording data file pointer is a pointer for specifying an access point in the recording data file, and is stored in the RAM of the PC, and stores the head position of the file when the recording data file is opened.

Further, if the content of the event is a playback command of recorded data (step S205), it is checked whether or not there is recorded data (step S206). First, the first packet data of the recorded data file is decoded and reproduced. Is performed (step S207). Thereafter, until the final packet is reached (step S208), the packet data is sequentially decoded and reproduced (step S20).
9) When the reproduction is completed, the process returns to the event check in step S201 again (P). Thereby, the recorded data can be reproduced.

If the content of the event is other than the reproduction command (step S205), the processing of another event (step S217) is performed, and then the step S2 is performed again.
It returns to the event check of 01 (P).

As described above, when recording cannot be performed on the PC side, the recording data can be stored in the monitor device 30 by a predetermined storage capacity.

FIGS. 7 and 8 are flowcharts showing in detail the stop operation and the restart operation of the alternative recording process by the monitor device of FIG.

As shown in FIG. 7, in the processing operation on the display device side, the monitor device 30 first performs an event check until an event occurs (step S30).
If there is an event, it is checked whether the event is a recording start event (step S303). If it is not a recording start event, perform other event processing
(Step S323), and the process returns to the event check of Step S301 again (A).

Next, if it is a recording start event,
Start the actual recording process. First, the TV tuner 325
Frame data is created from the data (1 frame) received in step (1) and is used as reference frame data (step S30).
4). Next, a packet buffer is newly opened to obtain a packet buffer pointer (step S305). The created frame data is written at the position of the packet buffer pointer, and after updating the packet buffer pointer (step S306), the frame counter is reset (step S307). Thus, reference frame data is created on the packet buffer.

Subsequently, frame data is created from the data (one frame) received by the TV tuner 325 (step S308), and the difference between the created frame data and the reference frame data is extracted to create difference data (step S308). S309). If the created difference data can be added to the packet buffer (step S310), the difference data is written at the position of the packet buffer pointer, and the packet buffer pointer is updated (step S3).
11), the frame counter is incremented (step S312). It is determined whether the value of the frame counter reaches the MAX value (step S313). Until the difference data cannot be stored in the packet buffer (step S310), the creation of the difference data and the writing to the packet buffer (steps S308 to S313) are repeated.

Next, it is checked whether or not the PC can record. As shown in FIG. 8, first, a write start signal is transmitted to the PC (step S314). The timer counter is reset (step S315), and an attempt is made to receive an acknowledgment signal issued from the PC (step S31).
6). If the acknowledgment signal from the PC can be received before the timer counter reaches the MAX value (step S316),
Since the PC can record, the contents of the packet buffer are transferred to the PC, and the packet buffer is closed (step S324).

Further, if an approval signal from the PC is not received before the timer counter reaches the MAX value (steps S317 and S318), it is determined that recording cannot be performed on the PC, and recording to the internal storage buffer is performed. Do. That is, if the internal storage buffer is not already opened (step S319), the internal storage buffer is newly opened to obtain an internal storage buffer pointer (step S32).
0). Subsequently, the contents of the packet buffer are written at the position of the internal storage buffer pointer, and after updating the internal storage buffer pointer (step S321), the packet buffer is closed (step S322), and the next of step S304 in FIG. The process is repeated from the creation of the reference frame (B).

With the above processing, the state of the PC can be determined for each packet data. Since the processing on the PC side is the same as that in steps S201 to S217, the description thereof is omitted here.

According to the above description, when recording cannot be performed on the PC side, the state on the PC side can be determined in packet data units even when the recording data is stored on the monitor device 30 side. When the recording is started on the PC side, the storage of the recorded data on the monitor device 30 can be stopped at the same time.

Similarly, when recording cannot be performed on the PC side, the PC starts up from the state where the recording data is stored on the monitor device 30 side, and stops storing the recorded data on the monitor device 30 side. After that, when the PC becomes incapable of recording again, the storage of the recorded data in the monitor device 30 can be restarted.

FIGS. 9 to 11 are flowcharts showing in detail the switching operation at the storage limit of the alternative recording process by the monitor device of FIG.

As shown in FIG. 9, in the process on the monitor device 30, first, the monitor device 30 performs an event check until an event occurs (step S40).
If there is an event, it is checked whether the event is a recording start event (step S403). If it is not a recording start event, perform other event processing
(Step S423), the process returns to the event check again (A).

If the event is a recording start event in step S403, it is checked whether or not the PC can record. First, a write start signal is transmitted to the PC.
(Step S404). Reset the timer counter
(Step S405), an attempt is made to receive an approval signal issued from the PC side (Step S406). If no approval signal is received from the PC before the timer counter reaches the MAX value (steps S407 and S408), it is determined that the PC cannot perform recording (step S409). If an approval signal can be received from the PC by then, it is determined that the PC is in a recording mode (step S424).

As described above, after judging the state of the PC, the actual recording process is started. First, TV tuner 3
Frame data is created from the data (1 frame) received in step 25, and is used as reference frame data (step S4).
10). Next, a packet buffer is newly opened to obtain a packet buffer pointer (step S411).
The created frame data is written at the position of the packet buffer pointer, and after updating the packet buffer pointer (step S412), the frame counter is reset (step S413). Thus, reference frame data is created on the packet buffer.

Subsequently, as shown in FIG. 10, frame data is created from the data (one frame) received by the TV tuner 325 (step S414), and the difference between the created frame data and the reference frame data is extracted. The difference data is created (step S415). If the created difference data can be added to the packet buffer (step S416), the difference data is written at the position of the packet buffer pointer, the packet buffer pointer is updated (step S417), and the frame counter is incremented (step S418). ). It is determined whether the value of the frame counter reaches the MAX value (step S419). Further, until the difference data cannot be stored in the packet buffer (step S416), the difference data is created and written into the packet buffer (step S416).
414 to S419) are repeated.

Further, when the difference data does not fit in the packet buffer (step S416), when the value of the frame counter reaches MAX (step S419),
In the case of the mode in which recording can be performed on the PC side (step S42).
0), the contents of the packet buffer are transferred to the PC, and the packet buffer is closed (step S425).

If the mode is not such that recording can be performed on the PC side (step S420), recording is performed in the internal storage buffer. If the internal storage buffer is not already opened (step S421), the internal storage buffer is opened. Open new and get internal storage buffer pointer
(Step S422).

Next, as shown in FIG. 11, when writing the contents of the packet buffer to the internal storage buffer, the remaining capacity of the internal storage buffer is checked to determine whether there is sufficient capacity to write the data of the current packet buffer. Is checked (step S426).

Further, if the remaining capacity is sufficient, the contents of the packet buffer are written at the position of the internal storage buffer pointer, and after updating the internal storage buffer pointer
In (Step S433), the packet buffer is closed (Step S434), and the process is repeated from the creation of the next reference frame (B).

Further, when the remaining capacity is insufficient, it is checked again whether or not the PC can record.
First, a write start signal is transmitted to the PC (step S427). The timer counter is reset (step S428), and an attempt is made to receive an acknowledgment signal issued from the PC (step S429). Timer counter is MAX
If an approval signal is received from the PC before the value is reached (steps S430 and S431), the previous determination is changed to a mode in which recording can be performed on the PC (step S435). In addition, the contents of the internal storage buffer, which is
After transferring to the C side and closing the internal storage buffer (step S436), the contents of the packet buffer are transferred to the PC and the packet buffer is closed (step S4).
25). Thereafter, the process proceeds as a mode in which the PC can record.

On the other hand, if the mode in which recording cannot be performed on the PC continues, that is, if an approval signal has not been received from the PC before the timer counter reaches the MAX value (steps S430 and S431), then the PC performs recording. Since it is necessary to maintain the continuity of the recorded data when the state shifts to a state in which the recording can be performed, the first packet in the internal storage buffer is deleted, the internal storage buffer is repacked, and the internal storage buffer pointer is adjusted (step S432). . Then, after writing the contents of the packet buffer to the position of the internal storage buffer pointer and updating the internal storage buffer pointer,
(Step S433), the packet buffer is closed (Step S434), and the process is repeated from the creation of the next reference frame (B).

On the other hand, since the processing on the PC side is the same as the processing in steps S201 to S217, the description thereof is omitted here. However, when viewed from the PC side, the recorded data is sequentially transferred. Therefore, according to the above description, when the data storage capacity of the monitor device 30 reaches the limit, the PC can start up and create continuous data on the PC.

FIGS. 12 to 14 are flowcharts showing in detail the switching operation at the storage limit of the alternative recording process by the monitor device of FIG.

First, in the processing on the monitor device 30 side,
As shown in FIG. 12, the monitor device 30 performs an event check until an event occurs (step S5).
01, S502), and if there is an event, it is checked whether the event is a recording start event (step S503). If the event is not a recording start event, another event process is performed (step S517), and the process returns to the event check of step S501 again (A).

If the event is a recording start event in step S503, the actual recording process is started. First,
Frame data is created from the data (one frame) received by the TV tuner 325 and used as reference frame data.
(Step S504). Next, a packet buffer is newly opened to obtain a packet buffer pointer (step S505). The created frame data is written at the position of the packet buffer pointer, and after updating the packet buffer pointer (step S506), the frame counter is reset (step S507). Thus, reference frame data is created on the packet buffer.

At this point, the event check is performed again.
(Step S508), it is checked whether or not an event of recording end has occurred (Steps S509, S51)
0). If the recording has not been completed (step S510), frame data is created from the data (one frame) received by the TV tuner 325 (step S511), and the difference between the created frame data and the reference frame data is extracted to obtain the difference. Data is created (step S512). If the created difference data can be added to the packet buffer (step S513), the difference data is written at the position of the packet buffer pointer, the packet buffer pointer is updated (step S514), and the frame counter is incremented (step S515). ).

Further, it is determined whether or not the value of the frame counter reaches the MAX value (step S516). It is determined whether or not a recording end event occurs (step S
510), until the difference data cannot be stored in the packet buffer (step S513), the difference data is created and written into the packet buffer (steps S511 to S511).
516) is repeated.

Next, it is checked whether or not the PC can record. As shown in FIG. 13, first, a write start signal is transmitted to the PC (step S518). The timer counter is reset (step S519), and an attempt is made to receive an acknowledgment signal issued from the PC (step S52).
0). If the acknowledgment signal from the PC can be received before the timer counter reaches the MAX value (step S520),
Since recording is possible on the PC side, first, if there is an internal storage buffer (step S533), the contents are
C and the internal storage buffer is closed (step S534). Next, the contents of the packet buffer are transferred to the PC and the packet buffer is closed (step S5).
35). If the transition is from the recording end event (step S536), a write end signal is transmitted to the PC here.

Further, if an approval signal from the PC is not received before the timer counter reaches the MAX value (steps S520 and S521), it is determined that the PC cannot perform recording, and the recording to the internal storage buffer is performed. Do. That is, if the internal storage buffer is not already opened (step S523), the internal storage buffer is newly opened to obtain the internal storage buffer pointer (step S52).
4).

Subsequently, the contents of the packet buffer are written at the position of the internal storage buffer pointer, and after updating the internal storage buffer pointer (step S525), the packet buffer is closed (step S526). If it is not a recording end event (step S527), the process is repeated from the creation of the next reference frame (B).

Further, in the case of the recording end event in step S527, the transfer to the PC is tried again here. That is, first, a write start signal is transmitted to the PC side.
(Step S528). Reset the timer counter
(Step S529), an attempt is made to receive an approval signal issued from the PC side (Step S530). If the approval signal from the PC can be received before the timer counter reaches the MAX value (step S530), the PC is ready to record.
(Step S533), the contents are transferred to the PC, and the internal storage buffer is closed (Step S534). Next, the contents of the packet buffer are transferred to the PC and the packet buffer is closed (step S535). In this case, since the transition is from the recording end event (step S536), a write end signal is transmitted to the PC side.

If the PC does not receive an approval signal before the timer counter reaches the MAX value (steps S530 and S531), it is determined that the PC has not received the write start signal to the PC. Again, the transfer to the PC is retried (steps S528 to S532).

According to the above description, a process of transferring the data stored in the monitor device 30 to the PC at the end of recording can be realized.

Next, in the processing on the PC side, as shown in FIG. 14, an event check is also performed on the PC side until an event occurs (steps S601 and S60).
2) If there is an event, it is checked whether it is a write start signal from the monitor device 30 (step S603). If the write start signal is from the monitor device 30, the recording management software is started (steps S611 and S61).
2) If it can be started (step S613), an approval signal is transmitted to the monitor device 30 side (step S614), and the process returns to the event check in step S601 again (P).
Accordingly, when the recording management software cannot be started for some reason or when the power of the PC is not turned on, the approval signal is not transmitted to the monitor device 30 side.

Also, in step S603, the monitor 30
When the content of the event is not the write start signal but the content of the event is data transfer from the monitor device 30 (step S604), and the recording data file has not been opened yet (step S615), the recording data file is newly opened. To get the recording seek pointer
(Step S616). At this time, if the recording data file is already open, it is already being recorded.
Use existing recording seek pointer. Next, the data transferred from the monitor device 30 is written at the position of the recording seek pointer, and the recording seek pointer is updated (step S
617), and then return to the event check of step S601 again (P). This allows the recorded data to be sequentially transferred to the PC
Can be saved in the recording data file on the side.

Further, when the content of the event is not the data transfer from the monitor device 30 but the content of the event is a write end signal from the monitor device 30 in step S604 (step S605), the recorded data file is already opened. Check if recording is in progress
(Step S618). If the recording data file is not open, it means that recording is not being performed, and the process returns to the event check of step S601 without any processing (P). If the recording data file is open, the file is closed (step S619), the recording management software is terminated (step S620), and the process returns to the event check in step S601 again (P).

Further, in step S605, the content of the event is not a write end signal from the monitor device 30,
If the content of the event is a playback command for recorded data
(Step S606), it is checked whether or not there is recorded data (Step S607). First, the first packet data of the recorded data file is decoded and reproduced (Step S608). Thereafter, until the final packet is reached (step S609), the packet data is sequentially decoded and reproduced (step S610). When the reproduction is completed, the process returns to the event check of step S601 again (P). Thereby, the recorded data can be reproduced.

As described above, the recording data stored in the monitor device 30 when the recording cannot be performed on the PC side,
After that, the PC starts up and is ready for recording.
When the recording is completed, the data recorded on the side can be connected and stored on the PC side, and can be reproduced at the time of recording and reproduction.

As described above, according to the present embodiment, when the user wants to record quickly, if the recording instruction is given from the input device 35, the power supply or the program on the PC side is not activated, or the recording is stopped during the recording. When the activation state detection means 330C cannot detect the activation state on the PC side, such as when the data communication line is disconnected, the storage control means 33 is temporarily operated by the monitor device 30 until the activation state on the PC side becomes detectable.
0D stores the compressed data from the MPEG2 encoder 327 in the first information storage means 328 and transmits the compressed data from the MPEG2 encoder 327 including the compressed data stored in the first information storage means 328 to the first data communication means 330B. To send data to the PC side via
The user can quickly record the video that the user wants to record at just timing without interruption of the recorded data, and can also prevent interruption of the recorded data.

When the recording state is detected by the activation state detecting means 330C, the recorded data stored in the first information storage means 328 and the other recorded data are transferred to the PC.
If continuous data is created by joining together, the recorded data can be recorded and played back and displayed without any discomfort.

[0109]

As described above, according to the present invention, when the user wants to record quickly, the data communication line is disconnected during the recording even if the power supply or the program on the information device is not activated. Even in the case where the information device is activated, the storage process in the first information storage unit is controlled according to the result of detection of the activation status of the information device.
If the data is stored on the display device side, it is possible to quickly record the video that the user wants to record at just timing without interruption of the recorded data, and to prevent interruption of the recorded data.

Further, in the recording / reproducing system according to the present invention, if the recording data stored in the first information storage means and the other recording data are joined to generate continuous data when the recording impossible state is detected, In addition, the recorded data can be recorded and played back and displayed without a sense of incongruity.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an external configuration of a recording / playback system according to an embodiment of the present invention.

FIG. 2 is a sectional view of the computer display terminal device of FIG. 1;

FIG. 3 is a block diagram illustrating a hardware configuration of a main part of the recording / playback system of FIG. 1;

FIG. 4 is a flowchart showing in detail an operation (part 1) of an alternative recording process by the monitor device of FIG. 1;

FIG. 5 is a flowchart showing in detail an operation (part 2) of an alternative recording process by the monitor device of FIG. 1;

FIG. 6 is a flowchart showing in detail a processing operation on a PC side for an alternative recording process by the monitor device of FIG. 1;

FIG. 7 is a flowchart showing in detail a stop operation and a re-operation (part 1) of the alternative recording process by the monitor device of FIG. 1;

8 is a flowchart showing in detail a stop operation and a restart operation (part 2) of the alternative recording process by the monitor device of FIG. 1;

9 is a flowchart showing in detail a switching operation (part 1) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

10 is a flowchart showing in detail a switching operation (part 2) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

11 is a flowchart showing in detail a switching operation (part 3) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

12 is a flowchart showing in detail a switching operation (part 1) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

13 is a flowchart showing in detail a switching operation (part 2) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

14 is a flowchart showing in detail a switching operation (part 3) of the alternative recording process by the monitor device of FIG. 1 at a storage limit time point.

[Explanation of symbols]

 Reference Signs List 10 recording / playback system 20 computer main body (PC) 21 USB I / F 22 display RGB I / F 30 monitor device 31 liquid crystal display panel 32 monitor control device 35 input device 40 computer signal cable 320 USB I / F 322 graphic controller 323 LCD driver 325 TV tuner 326 Video decoder 327 MPEG2 encoder 328 First information storage means 329 Memory 330 Control means 330A Tuning control means 330B Data communication means 330C Activation state detection means 330D Storage control means

Claims (7)

[Claims] 1. A television receiver for selecting and receiving a television signal.
V receiving means, a data compressing means for compressing data of a television reception signal, a first information storing means capable of storing data for a time required for activation of the information equipment, and a data communication between the information equipment. First data communication means for performing the operation, activation state detection means for detecting an activation state of the information device via the first data communication means, and storage of the first information in accordance with a detection result by the activation state detection means Storage control means for controlling storage processing in the information means, wherein the compressed data from the data compression means, including the compressed data stored in the first information storage means, is transmitted to the information device via the first data communication means. Display device that sends data to the side. 2. The image processing apparatus according to claim 1, further comprising: a recording instruction unit that instructs recording, wherein the storage control unit performs the recording instruction only when the activation state detection unit cannot detect the activation state of the information device at the time of the recording instruction by the recording instruction unit. 2. The display device according to claim 1, wherein compressed data from said data compression means is stored in said first information storage means. 3. The storage control means stops a process of storing the compressed data in the first information storage means when the activation state detection means detects an activation state of the information device. 3. The display device according to claim 1, wherein compressed data from the data compression unit, including compressed data stored in the information storage unit, is transmitted to the information device via the first data communication unit. 4. 4. The storage control means stops the processing of storing the compressed data in the first information storage means when the storage limit of the data storage capacity of the first information storage means is reached, and 4. The display device according to claim 1, wherein compressed data from the data compression unit, including the compressed data stored in the information storage unit, is transmitted to the information device via the first data communication unit. 5. . 5. The information processing apparatus according to claim 1, wherein the detection of the activation state of the information device is at least one of detection of a recordable state at power-on of the information device and detection of a recordable state at the time of recording. The display device according to any one of the above. 6. An information device, comprising: a display device according to claim 1, wherein at least one of display data and a television reception signal from the information device can be displayed on a display screen. A second information storage means for storing compressed data from the display device, a decompression means for reproducing the compressed data from the second information storage means and decompressing the data before compression; And a second data communication means for transmitting the data decompressed to the display device side. 7. A recording device comprising: data recording means for continuously connecting recording data stored in the first information storage means and other recording data when a recording impossible state is detected after recording is completed. A recording and playback system according to claim 6.