JPH08172569A - Motion picture processor and transmitter - Google Patents

Abstract

PURPOSE: To eliminate the effect of flicker noise on moving image information by setting the video image reception frequency of a video camera in response to synchronization of illuminance change of a lighting fixture. CONSTITUTION: A lens mechanism drive section 47 drives an aperture, a zoom magnification and the focus of a lens mechanism 41. A CCD(charge coupled device) drive section 48 drives a CCD sensor 42 synchronously with a timing signal outputted from a timing generating section 49. Furthermore, a memory control section 50 controls the input output timing of a field memory 45 synchronously with a timing signal outputted from the timing generating section 49. Then the period of the timing signal generated by the timing generating section 49 is adjusted to revise properly the fetch period of an image by the CCD sensor 42. Thus, the flicker noise of a moving image signal obtained from the video camera is almost completely eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture processing device for coding and compressing a moving picture signal inputted from a video camera device by a predetermined coding method, and a moving picture signal inputted from a video camera device to a predetermined moving picture coding device. The present invention relates to a moving image transmission device that encodes and compresses by a method and transmits to a partner terminal.

[0002]

2. Description of the Related Art Generally, since a moving picture signal has a very large amount of information, it may not be cost-effective to process the moving picture signal as it is when storing or transmitting it. Many.

For example, in a communication conference terminal device and a videophone terminal device, ITU-T Recommendation H.264 is recommended. The moving picture information is coded and compressed according to the moving picture coding method of H.261, so that the picture information can be transmitted with the image quality of practical use even at the transmission speed of the ISDN basic interface of 64 Kbps or 128 Kbps.

On the other hand, since the subject of the video camera device for photographing a moving image is normally illuminated by an illumination device which uses a commercial AC power source as its power source, the illuminance of the subject is periodic at the cycle of this commercial AC power source. Changes to.

Such a periodical change in illumination appears in a moving image captured by a video camera device as a so-called flicker phenomenon that periodically changes the brightness of the moving image.

The above-mentioned Recommendation H.264. In the encoding method of H.261, since the difference between frames of a moving image is detected and the difference information is encoded, if such a flicker phenomenon occurs, flicker noise that causes the difference to increase, resulting in formation of This causes an inconvenience that the amount of moving image code information to be generated becomes large.

In order to eliminate such inconvenience, for example, a moving picture coding apparatus having a filter for removing flicker noise from an input signal has been put into practical use.

[0008]

However, in such a conventional apparatus, since the filter for removing the flicker noise is provided, the apparatus cost of the moving picture coding apparatus becomes high. Further, depending on the characteristics of the filter, a situation may occur in which the flicker noise cannot be removed sufficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a moving image processing apparatus and a moving image transmission apparatus capable of removing the influence of flicker noise on moving image information.

[0010]

SUMMARY OF THE INVENTION According to the present invention, in a moving picture processing apparatus for coding and compressing a moving picture signal input from a video camera apparatus by a predetermined coding method, an AC power supply for discriminating the frequency of an AC power supply being supplied. Based on the frequency discriminating means and the frequency discriminated by the AC power source frequency discriminating means,
It is provided with a control means for setting the image capturing frequency of the video camera device.

Further, the AC power supply frequency discriminating means can be composed of an AC power supply frequency detecting means for detecting the frequency of the supplied AC power supply.

Also, in a moving picture transmission apparatus for coding and compressing a moving picture signal input from a video camera apparatus by a predetermined moving picture coding system and transmitting it to a partner terminal, an AC power supply frequency for judging the frequency of an AC power supply being supplied. It is provided with a discriminating means and a control means for setting an image capturing frequency of the video camera device based on the frequency discriminated by the AC power source frequency discriminating means.

The AC power supply frequency discriminating means can be composed of an AC power supply frequency detecting means for detecting the frequency of the supplied AC power supply.

The AC power supply frequency discriminating means stores its own terminal number storage means for storing the telephone number of its own terminal and an AC power supply frequency table showing the type of AC power supply frequency corresponding to the station number of the telephone number. The power source frequency table storage means and the telephone number stored in the self terminal storage means before the video transmission are read out, the telephone number of the telephone number is extracted, and the AC power source frequency table is referred to and extracted. It can also be composed of frequency discriminating means for discriminating the AC power supply frequency corresponding to the station number.

[0015]

Therefore, since the image capturing frequency of the video camera device is set according to the illuminance change period of the illumination,
The flicker noise of the moving image signal obtained from the video camera device can be almost completely removed, and as a result, the data amount of the encoded and compressed moving image information can be significantly reduced.

[0016]

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

FIG. 1 shows a conference communication terminal device according to an embodiment of the present invention. This conference communication terminal device is
A basic interface of SDN is used as a transmission line, and a communication function of voice information, a communication function of moving image information, a communication function of still image information, a facsimile communication function, a telewriting function, and a multiplexed communication of these communication functions It has a function and can be connected to the ISDN basic interface to enable data communication using two information channels (B channels).

In the figure, the system control unit 1 controls the respective units of the conference communication terminal device, processes of the upper layer of the video conference communication, execution processes of various application programs included in the conference communication terminal device, In addition, various control processes such as a help display process corresponding to a help request from a user are executed, and the ROM (read only memory) 2 is a part of a control process program executed by the system control unit 1 or The RAM (random access memory) 3 stores various data necessary for executing the control processing program.
Is a work area of the system control unit 1 and the like.

The clock circuit 4 is for outputting current date and time information, the scanner 5 is for reading and inputting an original image at a predetermined resolution, and the plotter 6 is for reading an image at a predetermined resolution. It is for recording and outputting, and the encoding / decoding unit 7 encodes and compresses the image signal read by the scanner 5 by the encoding method of the group 4 facsimile function, and at the same time, based on the encoded image information. The image processing unit 8 executes various image processing such as image data scaling processing and resolution conversion processing, and the magnetic disk device 9 is system software. It is for storing a plurality of application programs and a large number of user data.

The liquid crystal display device 10 is used as a display device having a telewriting communication function and also as a display unit when a user operates this conference communication terminal device. The LCD display control unit 11 is a liquid crystal display device. This is for controlling the display content of the display device 10.

The touch panel device 12 is a liquid crystal display device 1.
The touch panel controller 13 is provided on the display screen of 0 and outputs coordinate data touched and touch state data, and the touch panel controller 13 controls the operation of the touch panel device 12.

The voice input / output device 14 is for inputting a voice for a call with a microphone and outputting it with a speaker. An analog voice signal input from the voice input / output device 14 with a microphone is output to the voice CODEC 15. ,
The analog audio signal output from the audio input / output device 14 through the speaker is output from the audio CODEC 15 and added to the audio input / output device 14.

The audio CODEC 15 is for performing signal conversion processing of analog signal / digital data for transmitting an analog audio signal using the B channel of ISDN. The voice control unit 16 is for controlling the operation of the voice input / output device 14.

The video camera device 17 is for taking an image on the user side of the conference communication terminal device,
The moving image signal output from the video camera device 17 is
It is added to the video signal input end of the moving picture CODEC 18 and is also added to the moving picture signal input end of the display control section 19. The video camera control unit 20 uses the video camera device 17
Is for controlling various operation operations such as shooting on / off, zoom-in / zoom-out, and pan.

The moving picture CODEC 18 converts the moving picture signal of the video camera device 17 into the TTC standard JT-H. In addition to encoding and compressing with the H.261 encoding system to form moving image information,
The moving picture information in the encoded and compressed state is converted into the original moving picture signal.

The still image camera device 21 is for taking a still image, and the still image signal output from the still image camera device 21 is added to the still image CODEC 22.

The still image CODEC 22 encodes and compresses a still image signal applied from the still image camera device 21 by a predetermined encoding method (for example, JPEG method), and
The still image information in a compressed state is decoded into the original still image signal, and the formed still image signal for one frame,
Alternatively, the display controller 19 displays the still image signal obtained by decoding.
It is output to the still image signal input terminal of.

The display controller 19 includes a video monitor device 24.
It controls the display contents of the screen displayed on the screen of the video camera device 17 according to a command from the system control unit 1.
Display screen information of video signal output from video, video CODE
The display of the video monitor device 24 is formed in such a manner that the display screen information of the moving image signal output from C18 and the display screen information of the still image signal added from the still image CODEC 22 are formed, and the display screen information is appropriately combined. Configure the screen.

The ISDN interface circuit 25 is an IS
In addition to being connected to the DN, the signal processing function of the layer 1 of ISDN and the integration / separation function of the D channel signal and the two B channel signals are provided. Exchange and again
The signals of the two B channels are exchanged with the multiplexer / demultiplexer 27.

The D channel transmission control unit 26 has a D channel layer 2 signal processing function and a call control processing function for connecting / disconnecting one or two B channels.

The multiplexer / demultiplexer 27 multiplexes data of a plurality of media such as voice, moving images, and general-purpose data (other data such as still image data) exchanged using the B channel, and the TTC standard JT. -H. The frame data defined in 221 is formed and transmitted to the line side, and the data of a plurality of media multiplexed in the received frame data is separated. The multiplexer / demultiplexer 28 converts the audio data into audio CODE.
It exchanges with C15, and the video data is video CODE.
It exchanges data with the C18 and also exchanges general-purpose data with the system control unit 1.

These system control unit 1, ROM 2 and R
AM3, clock circuit 4, scanner 5, plotter 6, encoding / decoding unit 7, image processing unit 8, magnetic disk device 9, LC
D display control unit 11, touch panel control unit 13, voice CO
The DEC 15, the audio control unit 16, the moving image CODEC 18, the display control unit 19, the video camera control unit 20, the D channel transmission control unit 26, and the multiplexing / demultiplexing device 27 are connected to the internal bus 28, and each of these is connected. The exchange of element-related data is mainly performed via the internal bus 28.

Further, the power supply unit 29 takes in a commercial AC power supply and generates a plurality of DC power supplies required for each unit of this conference communication terminal device, and each DC power supply outputs to a corresponding element. Has been done. In addition, the power supply unit 29
Forms a commercial power supply frequency signal SF that is a pulse signal that rises in synchronization with the waveform of the commercial AC power supply, and the commercial power supply frequency signal SF is added to the system control unit 1.

In this conference communication terminal device, as shown in FIG. 3A, the own terminal number representing the ISDN number (telephone number) set in the own terminal is stored. This own terminal number is composed of a country code, an area code, and a subscriber number, and is stored in a predetermined storage area of the RAM 3. The own terminal number is set and input by an operation of the user or the like.

FIG. 2 shows an example of the operation display section of the conference communication terminal device shown in FIG.

The operation display unit 30 includes a liquid crystal display device 1
0 and a touch panel device 12 attached to the display screen of the liquid crystal display device 10 are provided. The touch pen 31 is for appropriately touching the operation surface of the touch panel device 12.

Further, as shown in FIG. 3B, the ROM 2 stores an area code AC frequency table showing the relationship between the area code in Japan and the frequency of the commercial AC power supply. This area code AC frequency table is formed in advance and stored in the ROM 2.

FIG. 4 shows an example of the configuration of the video camera device 17.

In the figure, by the lens mechanism 41,
An image is formed on the CCD (charge coupled device) sensor 42,
The video signal output from the CCD sensor 42 is sampled and amplified by a sample hold / AGC (automatic gain amplification) amplifier 42, and then added to an analog / digital converter 44.

The analog / digital converter 44 converts the input video signal into a corresponding digital signal, and the converted digital video signal is stored in the field memory 45. The digital video signal stored in the field memory 45 is converted into an analog moving image signal of a predetermined range through the digital / analog conversion / video signal control unit 46, and then the external device (in this case, the moving image CODEC1
8 and the display control unit 19).

The lens mechanism drive unit 47 drives the aperture, zoom magnification, focus, etc. of the lens mechanism 41, and the CCD drive unit 48 synchronizes with the timing signal output from the timing generation unit 49. do it,
The memory control unit 50 drives the CCD sensor 42, and controls the input / output timing of the field memory 45 in synchronization with the timing signal output from the timing generation unit 49. Therefore, by adjusting the cycle of the timing signal generated by the timing generation unit 49, the image acquisition cycle of the CCD sensor 42 can be appropriately changed.

The stand mechanism 51 is used for the video camera device 1.
It is a pedestal that supports 7, and is provided with a mechanism for panning and tilting the photographing screen. Stand mechanism drive unit 52
Is for driving the pan and tilt mechanism in the stand mechanism 51.

The controller 53 controls the video camera device 17
While controlling the operation of each section of the video camera, various control signals are exchanged with the video camera control section 20 to perform the operation specified by the video camera control section 20, and the information such as the operation result is displayed to the video camera. Notify the control unit 20.

FIG. 5 shows an example of the configuration of the power supply unit 29.

In the figure, a plug 55 is for taking in a commercial AC power source, and the commercial AC power source is in a state where noise is removed via a line filter 56, and via a main switch 57 and a fuse 58. , Is connected to the primary side of the power transformer 59.

The secondary output of the power transformer 59 is full-wave rectified by the bridge rectifier 60, and then the constant voltage unit 61.
Is converted into a DC power supply having a predetermined voltage and output to the outside.

The secondary side output of the power transformer 59 is
It is added to the frequency detection circuit 62. In the frequency detection circuit 62, the diode 62a half-wave rectifies the input AC signal, and its output is applied to the Schmitt trigger circuit 62b.

The Schmitt trigger circuit 62b is for shaping the input plus side 1/2 sine wave.
The output signal of the Schmitt trigger circuit 62b is output to the system control unit 1 as the commercial power supply frequency signal SF.

Therefore, the commercial power supply frequency signal SF is
In synchronization with the rising cycle of the AC waveform of the commercial AC power supply,
The pulse signal has a rising edge, and the frequency of the commercial power supply can be determined by detecting the rising interval of the edges of the commercial power supply frequency SF.

Now, in the conference communication terminal device, in the B channel, the TTC standard JT-H. Data is exchanged in the multi-frame format defined by 221.

As shown in FIG. 6, one multi-frame MFL includes eight sub-multi-frames SMF1 to SMF.
8 sub-multiframes SMF1 to 8
Each SMF 8 is composed of two frames. That is, one multi-frame MFL is composed of 16 frames FLM0 to FLM15.

Each frame FLM0 to FLM15
As shown in FIG. 7, it is composed of data of 80 octets, and the respective bit positions in which these octets are arranged in the bit order form subchannels SCH1 to SCH8.

The 8th bit of the 1st octet to the 8th octet is the frame synchronization signal (Frame Ali).
The 8th bit of the 9th octet to the 16th octet constitutes a bit rate allocation signal (Bit rate Allocation).
Signal) BAS. That is, the sub-channel SCH8 is assigned to the eighth bit of the 17th octet to the 80th octet, and this portion is applied to the application channel AC (Application Channel).
el) is sometimes called. Also, sub-channel SC
In the 17th to 24th octets of H8, data of an encrypted channel for exchanging key information for encrypting data may be set (optional).

In this way, the frame synchronization signal FAS
8 bits are arranged in one frame FLM0 to FLM15, and the bit allocation is configured in units of multi-frame MFL as shown in FIG.

That is, even frames FLM0, FLM
2, ..., The second to eighth octets of the FLM 14, and the odd frames FLM1, FLM3 ,.
A horizontal synchronization signal composed of an 8-bit data pattern "001101111" is arranged in the FLM 15, and a vertical synchronization composed of a 6-bit data pattern "001011" is arranged in the first octet of the odd-numbered frames FLM1, FLM3, ..., FLM11. A sync signal is placed.

By detecting the horizontal synchronizing signal and the vertical synchronizing signal, the synchronization of one multi-frame MFL can be detected.

The 0th frame, the 2nd frame, the 4th frame
Bits N1, N2, N3, N4, N5 of the first octet of the frame, the sixth frame and the eighth frame are used to indicate the multi-frame number. Of these, the bit N5 is used to indicate whether or not the multiframe number is used. In this way, since the data used for the multi-frame number is 4 bits, the multi-frame number changes in descending order with a value of 0 to 15, and the same multi-frame number appears every 16 multi-frames.

The tenth frame, the twelfth frame,
And bit L of the 1st octet of the 13th frame
1, L2, L3 are used to display the connection number indicating the order in which the B channels carrying the frame among the currently used B channels are connected. Also, the bit R of the first octet of the fifteenth frame is reserved (reserved) for future recommendation,
The value is set to 0.

The bit TEA of the first octet of the 14th frame is used to indicate that data transmission is not possible due to an internal failure of the data terminal device.

Also, odd-numbered frames FLM1, FLM3
.., bit A of the third octet of the FLM 15 is used to indicate whether frame synchronization or multi-frame synchronization is established or out of synchronization.

Also, odd-numbered frames FLM1, FLM3
..., bit C1 of the fifth octet, sixth octet, seventh octet, and eighth octet of FLM15
C2, C3 and C4 are for displaying a CRC (Cyclic Redundancy Check) code that is referred to for data error detection (that is, channel quality detection) of two consecutive frames (that is, sub-multiframe). , And the bit E of the fourth octet of the odd frames FLM1, FLM3, ..., FM15 is used to indicate that a transmission error has been detected on the receiving side.

The bit rate allocation signal BAS is, as shown in FIG. 9, even-numbered frames FLM0, FLM2.
.., FLM14, 8-bit data representing the capability BAS or BAS command is arranged, and in the subsequent odd numbered frames FLM1, FLM3 ,.
A double error correction code for error correcting the value of the capability BAS or BAS command transmitted in the immediately preceding frame is arranged.

Further, the transmission of the data of the multi-frame MFL is performed in the order of the frame numbers, and the respective frames FLM0 to FLM15 are transmitted in the octet order from the first octet to the 80th octet, as shown in FIG. The first bit of the octet is sent first.

That is, each of the frames FLM0 to FLM0
In the FLM 15, the first bit of the first octet is transmitted first and the eighth bit of the 80th octet is transmitted last.

FIG. 11 is a TTC standard JT-H.264 applied as a transmission control procedure executed when an audiovisual terminal such as a conference communication terminal apparatus transmits data using the B channel. 242 shows an example of a general procedure of 242. In this case, an example of a transmission procedure for exchanging audio data, general-purpose data, and moving image data between terminals using two B channels is shown.

First, the calling terminal makes a call to the destination terminal and performs a call setup procedure on the D channel to secure one B channel (hereinafter referred to as the first channel) (Phase A), Frame synchronization is performed while exchanging frame data in which PCM voice data (A-law or μ-law, 64 Kbps) is set on one channel (frame mode), and when frame synchronization is established, mutual capability BAS
Data and command BAS data are exchanged (phase B1-1), the transmission mode to be used at that time is determined, and an additional call setup request for securing the second B channel is started (phase B1-2). ).

Then, in principle, the modes having the highest functions common to each other are selected from the contents of the exchange of the transmission modes at that time (phase B1-3), and the calling terminal receives the selected operation mode. Send a BAS command that specifies the terminal function to operate the function to the calling terminal,
Parameters common to the device functions of the calling terminal and the called terminal are set (phase B2). Thereby, in the first channel, for example, data transmission of audio data (16 Kbps) and data transmission of moving image data (46.4 Kbps) corresponding to the transmission mode selected at that time are performed (phase C). .

When the first channel starts data transmission in the frame mode, the call setup procedure is performed on the D channel for the second B channel (hereinafter referred to as the second channel) (phase CA), and the second channel is established. Then, frame data including only the frame synchronization signal FAS and the bit allocation signal BAS is exchanged using the second channel to establish frame synchronization and multi-frame synchronization (phase CB1-11), and then the first channel and the second channel. Synchronization between channels is established (phase CB1-12).

When the synchronization of the two B channels is completed, the BAS command is sent from the calling terminal side to set the transmission mode (phase CB1-2), and the transmission mode is switched to the set contents (phase CB1-3). ), Common parameters are set (phase CB3).

In this way, when the initialization of the second channel is completed, after that, the frame data exchanged on the first channel and the frame data exchanged on the second channel are synchronized with each other. Using the B channel, for example, voice data, general data, and
Video data is 58 Kbps and 6.4 Kbps, respectively
And a data rate of 62.4 Kbps is assigned for data transmission (see FIG. 12). Here, the general-purpose data channel exchanges C & I mode (conference control function) data other than voice data, for example, C & I function, telewriting communication function, and bulk transfer function (group 4 facsimile data, etc.) data. Used for.

To end such data transmission, first disconnect from the second channel. At this time, the first
For voice data transmission on the channel only, the procedure for setting the common mode is performed (Phase CD
1), the mode of the second channel is switched to the mode 0F of the frame mode (phase CD2). At this time, the first channel and the second channel are asynchronous, and the second channel is in a state in which the call is held in the transmission state of only the frame synchronization signal FAS and the bit allocation signal BAS, and the call of the D channel is disconnected. The call for the second channel can be released by the release procedure.

In the first channel, phase CD1
During the phase CD2, the audio data and the moving image data are transmitted at the total transmission rate of 62.4 Kbps in the frame mode. Further, when the operator of one terminal ends the call, the transmission of the moving image data is finished. In order to use all the transmission capacities of the first channel including the transmission capacity of the moving image data for voice transmission, the mode is switched to the mode 0F (phase D2), and then the call disconnection release procedure of the D channel is performed. Is ready to be released.

As a result, the call disconnection release procedure is executed on the D channel for the first channel and the second channel (phase E), and the audiovisual transmission between the two terminals is completed.

As described above, in an audiovisual terminal such as a conference communication terminal device, one B channel (first channel) is first secured and a frame mode is established, and then audio data and moving image data are transmitted on this first channel. If the second B channel (second channel) can be set at the same time while performing the data transmission in the transitional mode by assigning the second transmission rate, the second channel is set by the D channel call setting procedure. Secure. Then, the first channel transmitting in the transient mode and the newly secured second channel are channel-synchronized, and when the channel synchronization is established, the allocation of the transmission rate of the audio data and the moving image data is reset. However, in order to utilize the increased transmission capacity of the B channel, the coding rule (coding method) of audio data and moving image data is changed so that higher quality audio data and moving image data can be exchanged. There is.

Further, when the data transmission is finished, it is necessary to once change from the mode in which the transmission path in which both the first channel and the second channel are synchronized is used to the mode in which only the first channel is used. is there. Therefore, first, each encoding rule of audio data and moving image data is set to a method that optimizes the transmission capacity of the first channel of 62.4 Kbps, and the transmission mode of only the first channel is changed, while the second channel is , The state of synchronization with the first channel is stopped, the mode shifts to mode 0F in which user data is in an idle transmission state, and the call is disconnected / released by the call disconnection release procedure of the D channel. The first channel is
From two types of media transmission of audio data and video data,
After changing to mode 0F, which is a transmission mode for only voice data, the call is disconnected / released by the D channel call disconnection release procedure.
release. In addition, the first channel, without switching the mode to two types of media transmission of audio data and video data,
It is also possible to disconnect / release the call after directly changing the mode to the mode 0F. In addition, the billing information obtained in the call disconnection / release procedure is managed for each channel.

Further, in the conference communication terminal device as shown in FIG. 1, the protocol stack for realizing the above-mentioned communication processing is independently configured for each application, and an example thereof is shown in FIG. Show.

In the figure, in the processing for executing the call control procedure using the D channel, the protocol stacks of Q921 and Q931 are used. Also, C & I control processing executed using the B channel, telewriting (TW)
For the control processing, the general-purpose data transmission (BULK) control processing, and the group 4 facsimile transmission (G4FAX) control processing, protocol stacks defined in the recommendation or standard of the corresponding device functions are used.

FIG. 14 shows a time chart when the conference communication terminal devices TA and TB having the same configuration as shown in FIG. 1 are exchanging data for C & I communication.

In the figure, the conference communication terminal devices TA, T
B forms a protocol stack for C & I communication, sets necessary conference control information in its user data, and exchanges these conference control information with each other.

With the above configuration, the system control unit 1 sets the image capturing frequency of the video camera device 17 by executing the processing shown in FIG. 15 when the power is turned on and the conference communication is started.

First, the AC power supply frequency discrimination process (process 10)
Perform 1) to determine the frequency of the AC power supply. Then, of the values of 1 or 2 times the determined AC power supply frequency, a value at which the frame rate of the NTSC signal output by the video camera device 17 is 60 Hz or higher is determined as the video capture frequency (process 102). ). For example, when the value of the determined AC power supply frequency is 50 Hz, the value of the image capturing frequency is 100 Hz. When the determined AC power supply frequency value is 60 Hz, the image capture frequency value is 60 Hz.

Next, the value of the image capturing frequency determined in this way is set in the video camera device 17 (process 1).
03). As a result, the video camera device
The timing generation unit 49 generates a timing signal based on the set video capturing frequency, and the video signal output from the video camera device 17 is
The video signal is captured at the set image capture frequency.

In this way, in this embodiment, since the video capturing frequency of the video camera device 17 is set according to the illuminance change cycle of the illumination of the place where the video camera device 17 shoots, the video camera device 17 is set. The flicker noise of the video signal obtained from 17 can be almost completely removed,
As a result, the data amount of the encoded and compressed moving image information can be significantly reduced.

Further, in this case, the moving image CODEC 18 does not need a filter means for removing the flicker noise of the input signal, the device cost of the moving image CODEC 18 can be reduced, and the cost of the entire device can be reduced.

FIG. 16 shows an example of the AC power supply frequency discrimination processing (processing 101).

First, the CPU waits until the rising edge of the commercial power supply frequency signal SF is detected (NO loop of judgment 201). When the result of judgment 201 is YES, the timer for timekeeping is started (process 202), and then the commercial power supply. Frequency signal SF
Waits for (NO loop of decision 203).

When the result of the judgment 203 is YES, the timer value of the timer for timer is read (process 204), the reciprocal of the timer value is calculated, and the AC power supply frequency is calculated (process 205).

In this way, the commercial power supply frequency signal SF
The rising interval of is measured, and the AC power supply frequency is calculated based on the measured result.

FIG. 17 shows another example of the AC power supply frequency discrimination processing (processing 101).

In this case, first, the content of the own terminal number stored in the RAM 3 is taken out (process 301), and the area code number is extracted from the own terminal number (process 302).
Then, using the extracted area code number, the above-mentioned area code AC frequency table is referred to read the AC power supply frequency (process 303).

Thus, in this case, the ROM 2
Area code AC frequency table stored in and RAM
Since the AC power supply frequency is determined based on the own terminal number stored in No. 3, the frequency detection circuit 62 is included in the power supply unit 29.
Need not be provided.

In the above embodiment, the case where the present invention is applied to the conference communication terminal device has been described. However, the present invention also applies to a communication terminal device using a video camera device such as a videophone terminal. The same can be applied.

[0093]

As described above, according to the present invention,
Since the video capture frequency of the video camera device is set according to the illuminance change cycle of the illumination, the flicker noise of the video signal obtained from the video camera device can be almost completely removed, and as a result, the encoding An effect that the amount of data of compressed moving image information can be significantly reduced is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a conference communication terminal device according to an embodiment of the present invention.

FIG. 2 is a schematic partial perspective view showing an example of an operation display unit of the apparatus shown in FIG.

FIG. 3 is a schematic diagram showing an example of an own terminal number and an area code exchange frequency table.

FIG. 4 is a block diagram showing an example of the configuration of a video camera device.

FIG. 5 is a block diagram showing an example of the configuration of a power supply unit.

FIG. 6 is a schematic diagram showing an example of a multi-frame frame configuration.

FIG. 7 is a schematic diagram showing an example of a signal configuration of one frame.

FIG. 8 is a schematic diagram showing an example of a frame adjustment signal.

FIG. 9 is a schematic diagram showing an example of a bit allocation signal.

FIG. 10 is a schematic diagram for explaining a signal transmission order.

FIG. 11: TTC Recommendation JT-H. The time chart which showed the example of the general procedure of 242.

FIG. 12 is a schematic diagram showing an example of allocation of transmission capacities to audio data, general-purpose data, and moving image data in data transmission using two B channels.

13 is a schematic diagram showing an example of a configuration of a protocol stack applied in a control process corresponding to each communication function of the apparatus of FIG.

FIG. 14 is a time chart showing an example of exchange of C & I information.

FIG. 15 is a flowchart showing a processing example when setting a video capture frequency.

FIG. 16 is a flowchart showing an example of AC power supply frequency determination processing.

FIG. 17 is a flowchart showing another example of the AC power supply frequency discrimination processing.

[Explanation of symbols]

 1 System Control Unit 2 ROM (Read Only Memory) 3 RAM (Random Access Memory) 29 Power Supply Unit

Claims (5)

[Claims] 1. A moving picture processing apparatus for coding and compressing a moving picture signal input from a video camera apparatus by a predetermined coding method, an AC power supply frequency judging means for judging a frequency of an AC power supply being supplied, and the AC power supply. A moving image processing apparatus comprising: a control unit that sets an image capturing frequency of a video camera device based on the frequency determined by the frequency determining unit. 2. The moving image processing apparatus according to claim 1, wherein the AC power supply frequency discriminating means comprises an AC power supply frequency detecting means for detecting the frequency of the supplied AC power supply. 3. An AC power supply frequency for discriminating the frequency of an AC power supply being supplied in a moving picture transmission device for coding and compressing a moving picture signal input from a video camera device by a predetermined moving picture coding system and transmitting it to a partner terminal. A moving image processing apparatus comprising: a discriminating means and a control means for setting an image capturing frequency of a video camera device based on the frequency discriminated by the AC power source frequency discriminating means. 4. The moving image transmission apparatus according to claim 3, wherein the AC power supply frequency discriminating means comprises an AC power supply frequency detecting means for detecting the frequency of the supplied AC power supply. 5. The AC power supply frequency discriminating means stores an AC power supply frequency table that represents a type of AC power supply frequency corresponding to a telephone number of the own terminal and a self terminal number storage means that stores the telephone number of the own terminal. The power supply frequency table storage means and the telephone number stored in the self terminal storage means before the video transmission are read out, the telephone number of the telephone number is extracted, and the AC power supply frequency table is referred to and extracted. 4. The moving image transmission apparatus according to claim 3, comprising a frequency discriminating means for discriminating an AC power supply frequency corresponding to the station number.