JPH01144882A - Video camera incorporated video tape recorder - Google Patents

Abstract

PURPOSE:To simplify the signal processing circuit system and to reduce the power consumption by supplying a sampling clock signal to a digital video camera part and a pulse signal used for the sampling to digitize a chrominance carrier signal from an external signal input section by a common pulse generating section. CONSTITUTION:A sampling clock signal to a digital video camera section 11 and a pulse signal supplied to sample for digitizing a chrominance carrier signal from an external signal input section 15 are supplied by a common pulse generating section 13. Thus, the digital processing to a color difference signal component from the digital video camera section 11 is applied and the chrominance carrier signal supplied from an external signal input section 15 is digitized through the external signal input section 15 to apply the digital processing to the output by a chrominance signal processing circuit section, and the constitution of the circuit section is simplified. Moreover, the power consumption is reduced.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Embodiment G-1 Structure and operation G-2 Modification H Invention Effect A Industrial Application Field The present invention includes a video camera section and an external signal input section,
The present invention relates to a video tape recorder integrated with a video camera that performs digital processing on at least a color signal of a video signal sent from a video camera section or a video signal supplied to an external signal input section and records the result on a tape.

B. Summary of the Invention The present invention comprises a digital video camera section and an external signal input section to which a video signal from the outside is supplied, and the present invention comprises a digital video camera section and an external signal input section to which a video signal from the outside is supplied. In an integrated video tape recorder that digitally processes at least the color signal of the supplied video signal and records it on tape, an analog/digital (A /D) Sampling in the conversion unit is performed based on a constant frequency pulse signal supplied to the digital video camera unit as a sampling clock signal, and further, the A/D
The output of the converter is decoded using a signal having a frequency of 1/N (N is a positive integer) of the frequency of the above-mentioned constant frequency pulse signal, and the phase error or frequency accompanying the decoding output is The data obtained in this way is
- Digitized color signal components or digital
A device containing the encoded output or a signal based on the encoded output after selectively encoding the digitized color difference signal component sent out from the video camera using a signal having a preset frequency. By recording the recorded signal on the tape, at least the color signal in the digitized video signal from the digital video camera unit or the video signal supplied to the external signal input unit can be recorded on the tape. This makes it possible to simplify the circuit configuration for performing digital processing during recording.

C. Prior Art To reduce the overall size and weight of a video tape recorder (VTR) used to record color video signals on magnetic tape and to reproduce color video signals from the recorded magnetic tape.

2. Description of the Related Art In order to reduce power consumption and improve reliability, various signal processing circuits are generally being digitized. When digitizing the entire signal processing circuit in such a VTR, the main issue is digitizing the circuit section that performs the processing required when recording the color video signal itself onto magnetic tape. Emphasis is placed on digitizing the color signal processing circuit section, which is responsible for processing the color signal components inside.

A VTR not only has the function of recording color video signals on a magnetic tape and reproducing them from the magnetic tape, but also has an integrated video camera as a color video signal source. A camera-integrated VTR has also been proposed. Video camera integrated VTR
The device is said to have the function of selectively recording the color video signal sent out from the video camera and the color video signal supplied through the external signal input terminal on magnetic tape, but the overall signal processing circuit is Under digitalization, a video camera uses, for example, a charge-coupled device (COD) image sensor to send out a video signal consisting of digitized luminance signal components and color difference signal components. The digital video camera is a digital video camera that selectively inputs the digitized video signal from the digital video camera and the video signal obtained by digitizing the color video signal supplied through the external signal input terminal. It is configured to have a circuit section that performs digital processing.

D. Problems to be Solved by the Invention As described above, when the entire signal processing circuit in a video camera integrated VTR is digitized, it is especially important to digitize the digitized video signal from the digital video camera. A color signal processing circuit section is configured to perform digital processing on the color difference signal components forming the video signal, digitize the carrier color signal in the color video signal supplied through the external signal input terminal, and perform digital processing on the output thereof. , a pulse generator that supplies a sampling clock signal to a digital video camera, and a pulse generator that supplies a pulse signal that is subjected to sampling for digitizing a carrier color signal in a color video signal from an external signal input terminal. The problem is that it tends to be relatively complex and large-scale, including various digital multipliers.

In view of the above, the present invention includes a digital video camera section and an external signal input section to which a video signal from the outside is supplied, and the present invention includes a digital video camera section and an external signal input section to which a digitized video signal from the digital video camera section or an external signal input section is supplied. When digitally processing at least the color signal of the video signal supplied to the digital video camera section and recording it on tape, digital processing is performed on the digitized color difference signal component from the digital video camera section, and an external signal input is also performed. An object of the present invention is to provide a video camera integrated VTR that can effectively simplify the configuration of a color signal processing circuit section that digitizes a carrier color signal supplied through a color signal processing section and performs digital processing on its output. .

E. Means for Solving the Problems In order to achieve the above-mentioned object, the video camera integrated VTR according to the present invention uses a pulse signal from a pulse generator that sends out a pulse signal of a constant frequency as a sampling clock signal. It is equipped with a digital video camera section that operates and sends out digitized luminance signal components and color difference signal components, and a carrier color signal component from an external signal input section based on a pulse signal sent out from the above-mentioned pulse generator. An A/D converter that performs sampling and digitizes the output, and a digital signal that uses a signal having a frequency between 1/2 of the frequency of the pulse signal sent from the pulse generator described above for the output of the A/D converter. A decoder section that performs coding, a phase control section that corrects the phase error or frequency offset accompanying the output of the decoder section, and a digitized color difference signal component sent from the output of the phase control section and the digital video camera section. In contrast, the recorder is provided with an encoder section that selectively performs encoding using a signal having a preset frequency, and further includes an output of the encoder section or a signal obtained based on the output of the encoder section. A recording operation section for recording signals on a tape is provided and configured.

F Effect In the video camera integrated VTR according to the present invention configured as described above, the frequency of the pulse signal sent out from the pulse generator is, for example, the carrier frequency of the carrier color signal component supplied to the external signal input section. It corresponds to an integer multiple of . Then, the carrier color signal component from the external signal input section is sampled by the pulse signal from the pulse generation section and digitized in the A/D conversion section,
Next, the decoder section uses a signal having a frequency that is 1/N of the frequency of the pulse signal from the pulse generation section, for example, the carrier frequency of the carrier color signal component supplied to the external signal input section. Coding is done,
Color difference signal components are obtained from the decoder section. In this case, the carrier frequency of the carrier color signal component supplied to the external signal input section and the frequency of the pulse signal from the pulse generation section are equal to 1
/N signal supplied to the decoder section, the color difference signal component obtained from the decoder section forms the carrier color signal component supplied to the external signal input section. Although the color difference signal components are accompanied by phase errors or frequency offsets, such phase errors or frequency offsets are corrected in the phase control section. The color difference signal component corrected by the phase control section is
The encoder section receives encoding using a signal having a preset frequency, for example, a signal having a frequency lower than the carrier frequency of the carrier color signal component supplied to the external signal input section, and converts the carrier color signal component into a low frequency carrier color signal component. The signal is then recorded on tape as a recording signal.

On the other hand, in the digitized color difference signal component sent out from the digital video camera section, the frequency of the pulse signal sent out from the pulse generation section is an integer of the carrier wave frequency of the carrier color signal component supplied to the external signal input section. By making it correspond to twice as much, it becomes equivalent to the color difference signal component obtained from the above-mentioned phase control section. Then, in the encoder section, for example, a signal having a frequency lower than the carrier frequency of the carrier color signal component supplied to the external signal input section is encoded and converted into a low-band carrier color signal component for recording. It is recorded on tape as a signal.

As described above, the carrier color signal component supplied to the external signal input section and the digitized color difference signal component sent out from the digital video camera section are selectively digitally processed to produce a low frequency carrier color signal. component and recorded on magnetic tape.

In this way, the supply of the sampling clock signal to the digital video camera section and the supply of the pulse signal used for sampling for digitizing the carrier color signal from the external signal input section are performed by a common pulse generating section. By performing digital processing on the color difference signal components from the digital video camera section, digitizing the carrier color signal supplied through the external signal input section and subjecting the output to digital processing. The configuration of the signal processing circuit section is simplified.

G Embodiment G-1 The configuration and operation diagram schematically shows an example of a video camera integrated VTR according to the present invention.

In this example, a digital video camera 11 is provided, which is constructed using, for example, a COD 73% image element and forms a color video signal according to the NTSC system. A pulse signal PC from a pulse generator 13 using a crystal oscillator is supplied to the digital video camera 11 as a sampling clock signal, and the frequency of the pulse signal PC from the pulse generator 13 is, for example, Carrier of color video signal according to NTSC system Carrier wave frequency of color signal rscζ4 of 3.58MHz
It is selected to be double (4/f8.). The digital video camera 11, which operates using the pulse signal PC as a sampling clock signal, outputs a color video signal according to the NTSC system, a digitized luminance signal DDY, and a digitized (R-Y) color difference signal. D D
(RY) and (B-Y) color difference signal D D (B-Y
), each is sent individually.

On the other hand, an external signal input terminal 15 is also provided, and in this example, a carrier color signal component C in a color video signal according to the NTSC system is supplied to the external signal input terminal 15. The carrier color signal component C from the external signal input terminal 15 is supplied to the A/D converter 17. The A/D converter 17 is supplied with the pulse signal PC from the pulse generator 13 as a sampling pulse signal, and the A/D converter 17 performs sampling based on the pulse signal PC for the carrier color signal component C. is carried out, and the carrier color signal component C is sampled by the A/D converter 17 at a frequency (4·f8.) that is four times the carrier frequency fsc. A carrier color signal DC is sent out.

The digital carrier color signal DC is directly transmitted to the switch 23
and 25, and is also supplied to selection contacts 23c and 25c of switches 23 and 25, respectively, through polarity inverters 19 and 21. At the control end of each of the switches 23 and 25,
The pulse signal PC from the pulse generator 13 is divided by 1/N, specifically, by 174, and each frequency is 4 f sc/
4 = sin wave signal CN with f sc, and co
From the 1/N frequency divider 27 forming the n-wave signal CN2,
n-wave signal CN.

and con wave CN are supplied, respectively. These polarity inversion parts 19 and 21. Switches 23 and 25 and 1/N
The frequency dividing section 27 constitutes a decoder 2 for the digital carrier color signal DC.

In such a decoder 28, the switch 23 has a selection contact 23 which is an empty contact between selection contacts 23a and 23c.
b, and its movable contact 23d is 1/N
During the period in which the sine wave signal CN1 from the frequency dividing section 27 takes the positive peak and its neighboring level, the sine wave signal CN1 is applied to the selection contact 23a.

The sine wave signal CN is applied to the selection contact 23b during the period in which the sine wave signal CN is at or near zero level.

are respectively connected to the selection contact 23c during the period when the negative side peak and the level in the vicinity thereof are reached. As a result, the movable contact 23d of the switch 23 receives 1/(
A decoded signal is obtained by sequentially and repeatedly multiplying +1.0 and -1 with a period of 4 fsc), and this signal is, for example, the (RY) color difference component D(RY) '. Further, the switch 25 has a selection contact 25b which is an empty contact between the selection contacts 25a and 250, and the movable contact 25d is connected to one
The selection contact 25 is activated during a period in which the cosine wave signal CN2 from the /N frequency divider 27 takes a positive peak and a level near the positive peak.
a, to the selection contact 25b during the period in which the cosine wave signal CN takes the zero level or a level near it;
It is assumed that the cosine wave signal CN is connected to the selection contact 25C during the period in which the cosine wave signal CN takes a negative peak and a level near the negative peak. Thereby, the movable contact 25d of the switch 25
In this case, a digital carrier color signal DC is added to a cosine wave signal CN.
+1 with a period of 1/(4・fsc) synchronized with ,
．． A decoded signal obtained by sequentially and repeatedly multiplying by 0 and -1 is obtained, and this signal is, for example, the (B-Y) color difference component D (B-Y)'.

The sine wave signal C sent out from the above-mentioned 1/N frequency divider 27
N and the cosine wave signal CN have the frequency Esc, but are in an asynchronous relationship with the carrier wave signal of the carrier color signal component C supplied to the external signal input terminal 15. Therefore, (RY) is obtained at the movable contact 23d of the switch 23.
Color difference component D (R-Y)' and (B-Y) color difference component D (B-
Y)' respectively form the carrier color signal component C (R-
The (RY) color difference signal component and (B-Y) color difference signal component are accompanied by a phase error, but the (R-Y) color difference component D (R-Y)' ) Color difference component D
The phase error associated with each of (B-Y)' is the switch 2
3 and the automatic phase control (
APC) is corrected in the loop section 30.

In the APC loop unit 30, the (R-Y) color difference component D(R-Y)° obtained at the movable contact 23d of the switch 23
, and obtained at the movable contact 25d of the switch 25 (B
-Y) chrominance components D (B-Y)' are respectively
1 and 33 are multiplied by correction signals E1 and E2 sent from a voltage controlled oscillator (VCO) 35. The corrected (RY) color difference component D (RY) obtained from the multiplier 31 as a result of such multiplication and the corrected (B-Y) color difference component D (B-Y) obtained from the multiplier 33 have a comb shape. The signals are supplied to a filter 39, and the luminance signal components contained in each signal are removed. Corrected (RY) color difference component D from which the luminance signal component is removed, obtained from the comb filter 39
(RY) and correction (B-Y) color difference component D (B-Y
) is supplied to the error detection section 37, and in the error detection section 37, the correction (R-Y) color difference component D (R-Y) and the correction (R-Y) are supplied to the error detection section 37.
B-Y) Color difference component D The level of the (RY) axis component of the color burst signal included in (B-Y) is detected, and a control signal PE is generated according to the detected level. Then, the control signal PE obtained from the error detection section 37 is supplied to the CO 35, and the frequencies of the correction signals E+ and E2 sent from the VCO 35 are controlled according to the control signal PH. Obtained correction (R-Y) color difference component D (1?-Y) and multiplier 3
Correction obtained from 3 (B-)') chrominance component D (B-Y)
As a result, the phase of the corrected (RY) color difference component D (RY) and the corrected (B-Y) color difference component D (B-Y) detected by the error detection unit 37 is controlled. The level of the (RY) axis component of the color burst signal is made to be zero. That is, the corrected (R-Y) color difference component D (R-Y) obtained from the multiplier 31 and the multiplier 33, respectively.
and corrected (B-Y) color difference component D (B-Y) forms carrier color signal component C (R-Y) color difference signal component and (B
-Y) There is no phase error with respect to the color difference signal components.

In this way, the APC loop section 30 performs phase correction, and the comb filter 39 removes the luminance signal component, resulting in the (R-
Y) Color difference component D (RY) and (B-Y) Color difference component D
(B-Y) is supplied to the selection contact 41b of the switch 41 and the selection contact 43b of the switch 43, respectively. Selection contact 41a of switch 41 and selection contact 4 of switch 43
3a shows a digitized (RY) color difference signal D D (
(RY) and (B-Y) color difference signals D D (B-Y) are supplied, respectively. Further, a switch control signal Ss from a terminal 45 is supplied to each control end of the switches 41 and 43, and in response to the switch control signal Ss, the movable contact 41c of the switch 41 is connected to the selection contact 41a. The movable contact 43c of the switch 43 is the selection contact 43a
from the digital video camera 11 (
R-Y) color difference signal D D (R-Y) and (B-Y) color difference signal D D (B-Y) are supplied to multipliers 47 and 49 in encoder 50 through switches 41 and 43, respectively. and the movable contact 41c of the switch 41.
is connected to the selection contact 41b, and the movable contact 43c of the switch 43 is connected to the selection contact 43b. D (B-Y) is the switch 41
and 43, the multiplier 47 in the encoder 50
and 49, respectively, are selectively taken.

In the encoder 50, each of the predetermined frequencies is sent out from a VCO 55 which performs frequency control based on a control signal Sc from an automatic frequency control circuit section (AFC circuit section) 53 to which a horizontal synchronizing signal sh is supplied through a terminal 51. For example, a pair of reference signals S1 and S2 having approximately 743 kHz and a phase difference of 90 degrees are supplied to multipliers 47 and 49, respectively. Then, in the multiplication section 47, the digital video camera 1
(R-Y) color difference signal D D (f?-Y) from 1,
Alternatively, the (1?-Y) color difference component D (R-Y) from the comb-shaped filter 39 is multiplied by the reference signal S1, and the (R-Y) color difference signal D D (R4) or (R
-Y) color difference component D (R-Y) is encoded, and from the multiplier 47, (1?-Y) color difference signal D
D (RY) or ()? -Y) color difference component D(R
-Y) is obtained, and in the multiplier 49, the (B-Y) color difference signal D D (8-Y) from the digital video camera 11 is obtained.
Or, the (B-Y) color difference component D (B-Y) from the comb filter 39 is multiplied by the reference signal S2, and the (B-Y) color difference signal D D (84) or (
Encoding is performed on the B-Y) color difference component D (B-Y), and the multiplier 49 outputs the (B-Y) color difference signal D D (R4) or the (B-Y) color difference component D (B-
D (BY) is obtained as a low-frequency carrier component for Y).

The low-frequency carrier component L D (RY) and low-frequency carrier component L D (84') obtained from the multipliers 47 and 49, respectively, obtained in this way are added together in the adder 57 to reduce the After being converted into a gamut carrier color signal component LD, it is supplied to a digital/analog (D/A) converter 59 and converted into a D/A
A low frequency carrier color signal LC is derived from the converter 59, which is an analog signal and has a carrier frequency of approximately 743 kHz, for example. This low frequency carrier color signal LC is transmitted to the recording amplification section 6.
After being amplified by the recording amplifying unit 6 in the adding unit 63,
It is frequency-multiplexed with the luminance signal FY, which is a frequency modulated signal, and is supplied to the adder 63 through the recording video signal
and is supplied to both selection contacts 67r and 69r of record/playback switches 67 and 69. The recording/reproduction switches 67 and 69 also include a selection contact 67p connected to the reproduction amplification section 73 and a selection contact 69p connected to the reproduction amplification section 75, respectively, and also have a switch control signal supplied from the terminal 71. Recording/recording is controlled by St.
The recording state is such that the movable contact 67q of the playback switch 67 is connected to the selection contact 67r and the movable contact 69q of the record/playback switch 69 is connected to the selection contact 69r, and the movable contact 67q of the record/playback switch 67 is connected to the selection contact 67p.
The recording/reproducing switch 69 is connected to the recording/reproducing switch 69, and the movable contact 69q of the recording/reproducing switch 69 is connected to the selection contact 69p.

Then, with the recording/playback switches 67 and 69 in the recording state, the recorded video signal V from the adding section 63 is
is supplied to the rotating magnetic heads 77 and 79 through the recording/reproducing switches 67 and 69, and the rotating magnetic heads 77 and 79 are brought into contact with the magnetic tape TP alternately with a slight overlap.
recorded with a large number of inclined tracks.

Note that when the recording/reproducing switches 67 and 69 are in the reproducing state, the rotating magnetic heads 77 and 79 alternately scan the inclined tracks formed on the magnetic tape TP with a slight overlap. Reproduction video signals from the magnetic tape TP are obtained alternately from the rotating magnetic heads 77 and 79, and these are transmitted to the reproduction amplification sections 73 and 75 through the recording/reproduction switches 67 and 69.
and then subjected to subsequent regeneration processing.

As described above, the (R-Y) color difference signal D D (R-Y) and (B-Y) color difference signal D D (B-Y) sent out from the digital video camera 11 and the external signal input terminal The carrier color signal component C supplied from 15 is selectively digitally processed to become a low frequency carrier color signal LC,
Furthermore, it is frequency-multiplexed with the luminance signal FY, which is a frequency modulated signal, and recorded on the magnetic tape TP. In the above configuration, the decoder 28 adds +1 to the digital carrier color signal DC obtained from the A/D converter 17.
, 0, and -1 are sequentially and repeatedly multiplied, and the multiplication unit 31 and It is sufficient that each of 33 performs low-speed operation.

Therefore, the entire configuration is simplified and relatively small-scale, and power consumption is reduced.

G-2 Modified Example The above example deals with the carrier color signal in the color video signal according to the NTSC system, but the integrated video camera VTR according to the present invention handles the carrier color signal in the color video signal according to the PAL system. It can be considered as something that handles signals. For example, when the above example is modified to handle a carrier color signal in a color video signal according to the PAL system, the pulse signal P from the pulse generator 13 is
C determines the frequency as the carrier frequency of the color signal of the color video signal according to the PAL system f scp”i 4.4
3 MHz (3.f 5 cp), and the 1/N frequency divider 27 is
The pulse signal PC from is divided by 173, each having a frequency of 3.
'f! cp/3 = sin with f scp
It is assumed that a wave signal CN and a con wave signal CN2 are formed.

In such a case, the (R4') color difference component D(1?-Y)' obtained at the movable contact 23d of the switch 23, and
The (B-Y) color difference components D (B-Y)' obtained at the movable contact 25d of the switch 25 are (R-Y) color difference signal components forming the carrier color signal component C according to the PAL system, respectively. and (B-Y) for the color difference signal component, approximately 3
It is accompanied by a frequency offset of 30 kHz, and the (RY) color difference components D (RY)' and (B
-Y) A frequency offset of approximately 330 kHz accompanying each of the color difference components D (B-Y)' is corrected in the APC loop unit 30. And A.P.
The error detection section 37 in the C loop section 30 includes the multiplication section 31
and 33 and passed through the comb filter 39, the corrected (+?-Y) color difference component D (R-Y) and the corrected (B-Y)
) The color burst signal included in the color difference component D (B-Y) is made to correspond to the corrected (R-Y) color difference component D (R-Y) by -45 degrees, and the corrected (B-Y) color difference is Component D
The level of the (R-Y) axis component of the signal obtained by shifting the phase by +45 degrees in correspondence with (B-Y) is detected, and a control signal PE is formed according to the detected level. .

Further, it is assumed that the VCO 55 forming the encoder 50 sends out a pair of reference signals S and S2, each having a frequency of approximately 732 kHz and having a phase difference of 90 degrees between them.

A modified example configured in this manner that handles a carrier color signal in a color video signal according to the PAL system is also a modification of the NTS system described above with reference to the drawings.
The same effects as in the case of handling a carrier color signal in a color video signal according to the C format can be obtained.

Further, in the above example, the low-frequency carrier color signal component LD obtained from the encoder 50 is converted into an analog signal by the D/A converter 59, and is recorded on the magnetic tape TP by the rotating magnetic heads 77 and 79. However, in the video camera integrated VTR according to the present invention, the low-frequency carrier color signal component LD obtained from the encoder 50 is not converted into an analog signal, but is sent to the rotating magnetic head 77 and as a digital signal. 79 may be used to record on the magnetic tape TP.

H Effects of the Invention As is clear from the above explanation, the video camera integrated VTR according to the present invention can convert the digitized video signal from the digital video camera section or the video signal supplied to the external signal input section. , at least the color signal is digitally processed and recorded on tape, it supplies a sampling clock signal to the digital video camera section, and provides sampling for digitizing the carrier color signal from the external signal input section. A common pulse generator is used to supply the pulse signals to be transmitted, and the digital multiplier used for digital processing of the digitized carrier color signal is operated at a relatively low speed. You can do what is sufficient.

Therefore, the entire configuration of the signal processing circuit system can be effectively simplified and made relatively small-scale, and power consumption can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an example of a video camera integrated video tape recorder according to the present invention. In the figure, 11 is a digital video camera, 13 is a pulse generator, 15 is an external signal input terminal, 17 is an A/D converter, 27 is a 1/N frequency divider, 28 is a decoder, and 30 is an APC.
Loop section, 31, 33, 47 and 49 are multiplication sections, 35 and 55 are VCO, 37 is an error detection section, 50 is an encoder, 57 and 63 are addition sections, 77 and 79 are rotating magnetic heads, TP is a magnetic tape. be. Procedural Amendments Showa A2, 72/2g I! , IL-1, Indication of the case Patent Application No. 30 Hiro Og7 of 1939 2, Name of the invention Video camera integrated video tape recorder 3, Relationship to the case by the person making the amendment Patent applicant address Kita, Tokyo Parts Co., Ltd. Item name: 6-7-35
Name (2/g) Nniichi Co., Ltd. Representative Norio Ohga 4, Agent 〒150 6, Number of inventions increased by amendment None 1) In the specification, page 15, lines 6 and 8, and page 22 The line 8, r con wave signal CNzJ, is corrected to r cos wave signal CNzJ. (2) Same, page 22, line 8, "Multiplying section 47 obtained in this way" is corrected to "Multiplying section 47 obtained in this way."that's all

Claims (1)

[Scope of Claims] A pulse generation section that sends out a pulse signal of a constant frequency; and a luminance signal component and a color difference signal component that operate using the pulse signal sent out from the pulse generation section as a sampling clock signal and are digitized. a digital video camera section for sending out a carrier color signal component, an external signal input section to which a carrier color signal component is supplied, and a method for transmitting the carrier color signal component from the external signal input section based on the pulse signal sent from the pulse generator. an analog/digital converter that performs sampling and digitizes the output;
a decoder section that performs decoding using a signal having a frequency of N (N is a positive integer); a phase control section that corrects a phase error or frequency offset accompanying the output of the decoder section; an encoder section that selectively encodes the digitized color difference signal component output and sent from the digital video camera section using a signal having a preset frequency; A video camera-integrated video tape recorder, comprising: a recording operation section for recording a recording signal including the output of or a signal obtained based on the output on a tape;