JP2002199338A - Recording and reproducing device and outputting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently use the recording area of a recorder by measuring the nonstandard degree of a video signal to be recorded, generating and recording a bit stream in the state of varying compressibility (bit rate) in accordance with the nonstandard degree. SOLUTION: A nonstandard degree measurement part 19 is provided to measure the nonstandard degree of the video signal to be recorded and the compressibility (bit rate) is decided in accordance with the nonstandard degree. Then, the bit stream is generated and recorded in a recording and reproducing part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for encoding and converting a video signal or the like of a broadcast program into a bit stream for recording, or an output apparatus for outputting the bit stream to an external device.

[0002]

2. Description of the Related Art In a conventional recording / reproducing apparatus, whether a video signal to be encoded is a high-quality video or a low-quality video, a compression rate (hereinafter referred to as a bit rate) predetermined by the apparatus. ) Or an encoded stream of a bit rate arbitrarily specified by the user, and recorded in the recording device.

[0003] Such a conventional recording and reproducing apparatus will be described with reference to FIG. FIG. 13 is a configuration diagram of a conventional recording / reproducing apparatus. In FIG. 13, reference numeral 1311 denotes NTSC
Decoder, 1312 is a compression encoding unit, 1313 is a recording / reproducing unit, 1314 is a decoding unit, 1315 is NTSC
An encoder 1316 is a microcomputer.

Next, the operation of the above-described conventional recording / reproducing apparatus will be described. First, upon receiving a video signal recording instruction from the user, the microcomputer 1316 causes the NTSC decoder 1
An instruction is set to convert the analog composite video signal input to 311 into digital video data, and a bit rate preset in the compression encoding unit 1312 is set, and a recording instruction is sent to the recording / reproducing unit 1313.

[0005] The NTSC decoder 1311 receives the conversion instruction from the microcomputer 1316, A / D converts the input NTSC analog composite video signal, and outputs digital video data and vertical synchronization signals conforming to the ITUR601 standard. A horizontal synchronizing signal is output, and the compression encoding unit 1312 outputs digital video data and a vertical synchronizing signal input from the NTSC decoder 1311;
A horizontal synchronization signal is input, compression encoding is performed to generate a video stream, multiplexing is performed with an audio stream and its accompanying information (not shown), and a transport stream (hereinafter, referred to as a TS) of a designated bit rate is performed. ) Is output.

The recording / reproducing unit 1313 is, for example, an HDD using a magnetic recording medium, and records the TS output from the compression encoding unit 1312. In addition, the T
When reproducing S, the decoding processing unit 1314 decodes the reproduced TS and outputs digital video data, a vertical synchronization signal, and a horizontal synchronization signal to an NTSC encoder 1315. The NTSC encoder 1315 outputs the decoded digital video data. The data is D / A converted and a synchronizing signal is added to form and output an analog composite video signal.

The recording / reproducing apparatus also performs decoding and D / A conversion on an audio stream to form and output an analog audio signal (not shown). Also,
As another example of a conventional recording / reproducing apparatus, see Japanese Patent Application Laid-Open No. 9-307.
There is a video encoding device disclosed in Japanese Patent No. 894, which detects the state of a video signal to be compression-encoded and, based on the result, reduces the redundancy of the video signal to increase the encoding efficiency.

Hereinafter, the video encoding apparatus will be described with reference to FIG. FIG. 14 is a diagram showing a configuration of a video encoding device as a conventional example. Originally, a film image is a signal of 24 Hz.
It is recorded as a telecine video converted to a 0 Hz signal. This conversion is performed by repeatedly displaying any field of the film image,
This is called 3-2 pulldown. Therefore, since the telecine video obtained by pulling down the film video by 3-2 is also input to the video encoding device, the video encoding device increases one of the redundant fields included in the telecine video in order to increase the compression rate. After encoding.

That is, as shown in FIG. 14, the video coding apparatus first converts a telecine video signal to be coded into a video signal of a frame in which the redundancy of the same frame is reduced in a frame frequency conversion unit 1411. Thereafter, noise is removed by the noise filter 1412 and coding is performed by the encoder 1413, thereby obtaining high coding efficiency.

Further, as another example of a conventional recording / reproducing apparatus, a video signal disclosed in Japanese Patent Application Laid-Open No. 8-98153, which employs a non-standard degree detecting unit for detecting a non-standard degree of an input video signal. There is a processing circuit.

The video signal processing circuit is a second generation EDT.
This is to prevent the picture quality of the V signal decoder from deteriorating, and to control other circuit units using a detection result of a non-standard detection circuit for detecting whether an input television signal is an NTSC standard signal or a non-standard signal. Is what you do.

When decoding an input signal using a signal called a compensation signal, if the input signal is a non-standard signal having noise, if the input signal is decoded using the compensation signal, Conversely, image quality is degraded. Therefore, this conventional video signal processing circuit detects whether the input signal is a standard signal or a non-standard signal using the above-mentioned non-standard detection circuit, and when it is detected that the input signal is non-standard, By forming a decoded video without reproducing the compensation signal, image quality deterioration is prevented.

[0013]

However, in the above-described conventional recording / reproducing apparatus, it is necessary to determine whether the state of the video signal to be recorded is close to a standard signal having almost no noise. Since compression encoding was performed at a recording rate specified by the user or at a recording rate preset in the apparatus and recorded in the recording apparatus, even if the video signal is non-standard, for example, the noise of the video signal is large. The recording was performed at a high rate, and the storage area for recording the video signal was not used efficiently.

Regardless of the state of the video signal to be recorded, the user selects and determines the recording method of recording the signal to be recorded in analog or digital format. However, the recording method is not selected in accordance with the state of the video signal to be recorded. Also,
The recording speed at the time of recording is selected and determined by the user, and encoding is performed by checking the state of the video signal recorded by the device, and the recording speed is not selected and recorded.

Furthermore, conventionally, when a video signal to be input and recorded is simultaneously output, program information such as device control information and channel information is stored in a video area of the output video signal in a non-valid state such as a synchronization unit and VBI information. The OSD screen is synthesized and output by either the OSD that switches the video area or the OSD that does not switch the video area. The OSD synthesis is performed by selecting the optimal OSD method according to the state of the video signal to be output. Did not output.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a signal state such as whether a video signal to be recorded is a clear video close to a standard signal or a video with deteriorated image quality is defined as a non-standard degree. By measuring and determining the bit rate and recording rate based on the measurement result of the non-standardity, by generating and recording a bit stream,
It is an object of the present invention to provide a recording / reproducing device capable of efficiently using a recording area of a recording device, or an output device capable of outputting such a signal to an external device.

It is another object of the present invention to provide a recording / reproducing apparatus which can select and determine a recording method of recording a signal to be recorded by analog recording or digital recording by the value of the non-standard degree. . Also, the present invention
It is an object of the present invention to provide a recording / reproducing apparatus capable of selecting and determining a recording speed at the time of recording video data.

Further, according to the present invention, when a signal to be input and recorded is output simultaneously, the state of the output video signal is checked,
The control information of the device, the program information such as the channel number, and the like, are either an OSD that replaces an ineffective video area such as a synchronization unit or VBI information or an OSD that does not perform replacement.
It is an object of the present invention to provide a recording / reproducing apparatus capable of selecting and processing an SD method.

[0019]

A recording / reproducing apparatus according to the present invention (claim 1) is a recording / reproducing apparatus for compressing and encoding digital video data to generate and record a bit stream. A / D conversion means for converting the analog video data into digital video data, synchronization detection means for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data, A non-standard degree measuring means for measuring a non-standard degree indicating the state of the digital video data from the information; and a compression for compressing and encoding the digital video data at a compression rate corresponding to the non-standard level to generate a bit stream. It is provided with encoding means and recording means for recording the bit stream.

According to a second aspect of the present invention, there is provided the recording / reproducing apparatus according to the first aspect, wherein the non-standardity measuring means is a standard signal standard of the synchronization information detected from the digital video data. The displacement from the synchronous data is measured by a counter and output as a non-standard degree, and the compression-encoding means, if the value of the non-standard degree increases from a preset non-standard degree reference value, A bit stream is generated such that the compression rate is reduced and the data amount of the digital video data is increased.

The recording / reproducing apparatus according to the present invention (claim 3) is the recording / reproducing apparatus according to claim 1, wherein the non-standardity measuring means is a standard signal standard of the synchronization information detected from the digital video data. The displacement from the synchronous data is measured by a counter and output as a non-standard degree, and the compression-encoding means, if the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, The bit stream is generated such that the compression rate is increased and the data amount of the digital video data is reduced.

The recording / reproducing apparatus according to the present invention (claim 4) is the recording / reproducing apparatus according to claim 2 or 3, wherein the non-standard degree measuring means detects the synchronization information by using a counter. The difference between the period length or the frame period length and the line length from the mutual difference or the normal value, or the average value or the accumulated value thereof is measured and output as the non-standard degree.

The recording / reproducing apparatus according to the present invention (claim 5) is the recording / reproducing apparatus according to any one of claims 1 to 4, wherein the non-standardity measuring means is used for A / D conversion in the A / D converting means. The non-standardity is measured from the synchronization information by a counter using a clock.

The recording / reproducing apparatus according to the present invention (claim 6) is the recording / reproducing apparatus according to claim 1, further comprising a digital broadcast reproducing means for demodulating a digital broadcast wave and decoding / reproducing the digital broadcast wave. The means measures the non-standardity from the synchronization information by a counter using a clock synchronized with a clock used for a process of forming a broadcast wave at a broadcasting station or the like.

The recording / reproducing apparatus according to the present invention (claim 7) is the recording / reproducing apparatus according to claim 6, wherein the clock used for the process of forming a broadcast wave at the broadcast station or the like is:
PCR (Program Clock Re) which is reference time information existing in the digital stream of the broadcast wave
reference) or SCR (System Cl)
The content is reproduced using an ACK Reference.

In the recording / reproducing apparatus according to the present invention (claim 8), in the recording / reproducing apparatus according to claim 1, the synchronization detecting means sets the synchronization timing of the digital video data based on the non-standard value. If it is determined that the synchronization timing is equivalent to the synchronization timing of the signal, the synchronization data of the digital video data is replaced with a synchronization signal having a cycle of a standard signal and output.

According to a ninth aspect of the present invention, there is provided the recording / reproducing apparatus according to the first aspect, wherein the synchronization information is detected from the input analog video signal before being filtered by the filter. 2 A / D
A conversion unit is further provided, and the non-standardity measuring unit measures the non-standardity from the synchronization information detected by the second A / D conversion unit.

According to a tenth aspect of the present invention, in the recording / reproducing apparatus of the ninth aspect, the filter is measured from the synchronization information detected by the second A / D converter. The filtering is performed by changing the characteristics of the filter according to the value of the non-standard degree.

In the recording / reproducing apparatus according to the present invention (claim 11), in the recording / reproducing apparatus according to claim 10, the filter is measured from the synchronization information detected by the second A / D conversion means. When the value of the non-standard degree increases from a preset reference value of the non-standard degree, the cut-off frequency of the filter is reduced and filtering is performed.

In the recording / reproducing apparatus according to the present invention (claim 12), in the recording / reproducing apparatus according to claim 10, the filter is measured from the synchronization information detected by the second A / D conversion means. If the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, the cut-off frequency of the filter is increased to perform the filtering.

According to a thirteenth aspect of the present invention, in the recording / reproducing apparatus according to the eleventh or twelfth aspect, the second A / D converting means has a frequency not less than twice the cutoff frequency. A / D conversion is performed using a clock.

[0032] In the recording / reproducing apparatus according to the present invention (claim 14), in the recording / reproducing apparatus according to claim 1, the non-standard degree measuring means measures a noise amount from the digital video data and sets the non-standard degree as the non-standard degree. When the value of the non-standard degree increases from a preset reference value of the non-standard degree, the compression-encoding means reduces the compression rate to reduce the data amount of the digital video data. A bit stream is generated so as to increase.

According to a fifteenth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the non-standard degree measuring means measures a noise amount from the digital video data and sets the non-standard degree as the non-standard degree. Output, and the compression encoding means increases the compression ratio if the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, and reduces the data amount of the digital video data. A bit stream is generated so as to decrease the bit stream.

The recording / reproducing apparatus according to the present invention (claim 16) is the recording / reproducing apparatus according to claim 14 or 15, wherein the non-standard degree measuring means measures a noise amount from one period of the digital video data. And outputs it as the non-standardity.

The recording / reproducing apparatus according to the present invention (claim 17) is the recording / reproducing apparatus according to claim 16, wherein the non-standardity measuring means measures the noise amount during the vertical retrace of the digital video data. This is a period corresponding to the period.

The recording / reproducing apparatus according to the present invention (claim 18) is the recording / reproducing apparatus according to claim 14 or 15, wherein the non-standard degree measuring means is a reference section such as a synchronizing signal section of the digital video data. Is detected, and a noise amount which is a total of the noise is output as a non-standard degree.

The recording / reproducing apparatus according to the present invention (claim 19) is the recording / reproducing apparatus according to claim 16, wherein the non-standard degree measuring means is configured to measure the potential of the digital video data from a reference portion such as a synchronization signal portion. The deviation period is measured as noise.

The recording / reproducing apparatus according to the present invention (claim 20) is the recording / reproducing apparatus according to claim 16, wherein the non-standardity measuring means detects the potential difference from a potential in a reference section such as a synchronous signal section of the digital video data. The deviation amplitude is measured as noise.

The recording / reproducing apparatus according to the present invention (claim 21) is the recording / reproducing apparatus according to claim 16, wherein the non-standardity measuring means detects the potential difference from a potential in a reference section such as a synchronous signal section of the digital video data. The deviation period and deviation amplitude are measured as noise.

The recording / reproducing apparatus according to the present invention (claim 22) is the recording / reproducing apparatus according to claim 1, further comprising resolution conversion means for changing the resolution of the digital video data and outputting the digital video data, Is to generate a bit stream by compression encoding digital video data whose resolution has been changed by the resolution conversion means.

The output device according to the present invention (claim 23) comprises:
An output device for compressing and encoding digital video data to generate and output a bit stream, comprising: a filter for filtering input analog video data; and A / D conversion means for converting the analog video data to digital video data. Synchronization detection means for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data, and non-standardity measurement means for measuring a non-standardity indicating the state of the digital video data from the synchronization information. , Compression encoding at a compression rate according to the non-standardity,
A compression encoding unit that adjusts the data amount of the digital video data to generate a bit stream; and a digital interface that outputs the bit stream to an external device connected to the output device.

The recording / reproducing apparatus according to the present invention (claim 24) is the recording / reproducing apparatus according to any one of claims 1 to 22, wherein the video data recording method, The digital still camera further includes a recording method determining means for selecting and recording either the digital recording method or the analog recording method.

The recording / reproducing apparatus according to the present invention (claim 25) is the recording / reproducing apparatus according to claim 24, wherein the recording method determining means sets the value of the non-standard degree to a value of the preset non-standard degree. If it exceeds the reference value, the recording system of the video data is switched from the digital recording system to the analog recording system.

The recording / reproducing apparatus according to the present invention (claim 26) is the recording / reproducing apparatus according to claim 24, wherein the recording method determining means sets the value of the non-standard degree to a value of the preset non-standard degree. If it is smaller than the reference value, the video data recording method is switched from the analog recording method to the digital recording method.

The recording / reproducing apparatus according to the present invention (claim 27) is the recording / reproducing apparatus according to claim 24, wherein the recording method determining means comprises: a mode in which a user determines the recording method; And a mode for determining the recording method.

The recording / reproducing apparatus according to the present invention (claim 28) is the recording / reproducing apparatus according to claim 24, wherein the buffer means for temporarily storing the bit stream and the bit stream temporarily stored in the buffer means are recorded on a recording medium. Recording, or further comprising a recording and reproducing means for reproducing a bit stream recorded on a recording medium, by the recording and reproducing means, when recording the bit stream, read the bit stream from the buffer means,
When recording at a rate different from the rate of the bit stream and reproducing the bit stream, the bit stream is reproduced and output at the rate of the bit stream without using the buffer means, or reproduced at the rate at the time of recording. The data is temporarily stored in the buffer means and then reproduced and output at the bit stream rate.

A recording / reproducing apparatus according to the present invention (claim 29) is the recording / reproducing apparatus according to claim 28, wherein the recording / reproducing means records the bit stream and rate information of the bit stream.

The recording / reproducing apparatus according to the present invention (claim 30) is the recording / reproducing apparatus according to claim 28, wherein the recording method for recording the bit stream temporarily stored in the buffer means on the recording medium is digital. In the case of the recording method, the minimum recording speed is selected from the recordable recording speeds corresponding to the bit stream rate.

The recording / reproducing apparatus according to the present invention (claim 31) is the recording / reproducing apparatus according to claim 30, wherein the recording method determining means comprises: a mode in which a user determines the recording speed; And a mode for determining the recording speed.

A recording / reproducing apparatus according to the present invention (claim 32) is the recording / reproducing apparatus according to any one of claims 25 to 31, wherein an OSD, a display panel, or the like is used.
A display unit for notifying a user that the non-standard degree or the recording method and the recording speed are switched is further provided.

The recording / reproducing apparatus according to the present invention (claim 33) is the recording / reproducing apparatus according to claim 1, further comprising a VBI signal forming means for replacing VBI information of the digital video data and forming a synchronizing section. Equipped, the above-mentioned VBI
The signal forming means forms a signal of the VBI information of the digital video data and outputs a video signal. If the value of the non-standard degree increases from a preset reference value of the non-standard degree, the VBI signal is output. The video signal is output by switching to the path using the signal forming means.

The recording / reproducing apparatus according to the present invention (claim 34) is the recording / reproducing apparatus according to claim 1, further comprising a VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section. The VBI signal forming means forms a signal of VBI information of the digital video data and outputs a video signal, and the value of the non-standardity decreases below a preset reference value of the non-standardity. For example, a video signal is output by switching to a path that does not use the VBI signal forming means.

The output device according to the present invention (claim 35) is:
24. The output device according to claim 23, further comprising VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section, wherein the VBI signal forming means converts the VBI information of the digital video data. A signal using the VBI signal forming means, and outputting the video signal based on the non-standard value.
A video signal is output by switching between a path that does not use the I signal forming means.

In the recording / reproducing apparatus according to the present invention (claim 36), the recording / reproducing apparatus according to claim 1 combines ODS information with a video signal according to the non-standardity and OSD occupancy of the digital video data. OSD method determining means for determining a method, further comprising:
An OSD system A for synchronizing and synthesizing the OSD information with a VBI signal forming means for replacing the VBI information of the digital video signal and forming a synchronizing section;
An OSD method B for synthesizing the OSD information without re-forming the BI information and the synchronizing unit. The OSD method determining means determines the OSD method based on the non-standardity and the OSD occupancy.
One of the method A and the OSD method B is selected, and the video signal is combined with OSD information and output.

The recording / reproducing apparatus according to the present invention (claim 37) is the recording / reproducing apparatus according to claim 36, wherein the OS
The D-system determining means outputs the OS signal to the video signal or the reproduction signal.
When the D information is synthesized and output, if the value of the non-standard degree and the OSD occupancy increase from a preset reference value, OSD information is added to the video signal using the OSD method A. These are synthesized and output.

The recording / reproducing apparatus according to the present invention (claim 38) is the recording / reproducing apparatus according to claim 36, wherein the OS
When the OS method is combined with the output signal and the OSD information is output, the value of the non-standard degree increases from a preset reference value, and the OSD occupancy ratio is set to a predetermined reference level. If the value is lower than the value, the OSD information is combined with the video signal using the OSD method B and output.

The recording / reproducing apparatus according to the present invention (claim 39) is the recording / reproducing apparatus according to claim 36, wherein the OS
The D-scheme deciding means, when synthesizing the output signal with the OSD information and outputting the OSD information, if the value of the non-standard degree is smaller than a preset reference value, the OSD scheme A or the O-scheme.
Using the SD system B, the video signal is combined with OSD information and output.

The output device according to the present invention (claim 40) is:
24. The output device according to claim 23, further comprising: an OSD method determining unit that determines an OSD method for combining ODS information with a video signal based on the non-standardity and the OSD occupancy of the digital video data. An OSD method A that corrects synchronization and synthesizes and outputs OSD information by a VBI signal forming unit that replaces VBI information of a video signal and forms a synchronization unit without re-forming the VBI information and the synchronization unit. OSD that synthesizes OSD information
The OSD method determining means selects either the OSD method A or the OSD method B based on the non-standardity and the OSD occupancy, and outputs the OSD method to the video signal.
D information is synthesized and output.

[0059]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of the recording / reproducing apparatus according to the first embodiment. In FIG. 1, reference numeral 11 denotes an input terminal to which an NTSC analog video signal (composite signal) to be digitally recorded is input;
A filter 13 for filtering an analog video signal of the SC system; an A / D conversion unit 13 for converting the analog video signal into digital video data by A / D conversion;
A video data processing unit for separating luminance data and color difference data from input digital video data and outputting the separated data;
Is a synchronization detection unit that separates and outputs vertical synchronization data and horizontal synchronization data from input digital video data. Reference numeral 15 denotes an ITUR 601 based on input luminance data and color difference data, vertical synchronization data, and horizontal synchronization data. A formatter for outputting standard-compliant digital video data, a vertical synchronization signal, and a horizontal synchronization signal; 19, a non-standardity measuring unit for measuring and outputting non-standardity from the input vertical synchronization data and horizontal synchronization data; 16 uses the non-standard degree from the non-standard degree meter measuring unit 19 to compress and encode the input video data, and
TS), and generates and outputs a compression encoding processing unit, 1
Reference numeral 7 denotes a recording / reproducing unit that records and reproduces an input TS.

Next, the operation of the recording / reproducing apparatus will be described. The analog video signal input to the input terminal 11 is filtered by the filter 12 and output to the A / D converter 13. The A / D converter 13 to which the analog video signal has been input performs A / D conversion using an A / D conversion clock signal (not shown), and converts the obtained digital video data into video data. Output to the processing unit 14.
The video data processing unit 14 performs Y / C separation for separating luminance data and color difference data from the digital video data output from the A / D conversion unit 13, performs chroma decoding, and outputs digital video data. .

On the other hand, the synchronization detecting section 18 separates the vertical synchronizing data and the horizontal synchronizing data from the digital video data from the A / D conversion section 13 and outputs them. This synchronization separation is detected by identifying that the digital video data is a synchronization section if the digital video data is lower than two reference potentials (threshold levels) provided for synchronization detection.

The formatter 15 converts the luminance data and color difference data from the video data processing unit 14 and the vertical synchronization data and horizontal synchronization data from the synchronization detection unit 18 into digital video data and vertical synchronization signals conforming to the ITUR601 standard. , A horizontal synchronizing signal,
6 is output.

The non-standard degree measuring section 19 measures and outputs the non-standard degree from the vertical synchronization data and the horizontal synchronization data from the synchronization detecting section 18. This non-standardity is determined by sequentially measuring the longest line length and the shortest line length for each video field from the vertical synchronizing data and the horizontal synchronizing data by the counter using the A / D conversion clock. And the difference between the shortest line length and the shortest line length.

Hereinafter, the operation of the non-standardity measuring section 19 will be described with reference to FIG. FIG. 2 (a) and FIG.
(B) shows that the synchronization detecting unit 18 has detected from the video data.
FIG. 2 is a diagram showing horizontal synchronization pulses for several continuous lines,
2A shows a case where the video signal is a standard signal, and FIG.
(B) is a case of a non-standard signal in which the S / N value of the input signal is not good.

When the non-standardity, which is the difference between the longest line length and the shortest line length for each video field of the input video signal, increases, the synchronization detecting unit 18 detects the difference from the normal position of the horizontal synchronization pulse. Synchronization is detected. As a result, as shown in FIG. 2B, the line lengths of the horizontal synchronization pulses detected by the synchronization detection unit 18 are different from each other, and a variation occurs with respect to the line length of the normal horizontal synchronization pulse. Become.

The non-standard degree measuring section 19 obtains the maximum value of the generated fluctuation by using the clock used for the A / D conversion, and outputs the maximum value as the non-standard degree.
Since this non-standard degree is measured by the clock used for the A / D conversion, it is output as a value in terms of the number of pixels. Here, the number of video frames is, for example, a period corresponding to five frames. Is measured, and a value obtained by averaging those values is regarded as a non-standard degree.

Next, the compression / encoding processing unit 16 to which the non-standard degree obtained as described above is input is compression-coded using the non-standard degree to input video data conforming to the ITUR601 standard. Generate and output a TS. At this time, if the non-standard degree is 2 pixels or less, the video data rate is compressed at 6 Mbps. If the non-standard degree is 3 pixels or more, the video data rate is compressed at 4 Mbps. Generate The compression encoding unit 16 compresses audio data to generate compressed audio data (not shown), multiplexes compressed video data and compressed audio data (not shown), and outputs a TS. I do.

The TS output from the compression / encoding processing section 16 is recorded by the recording / reproducing section 17. Also,
The recording / reproducing unit 17 also reproduces the recorded TS, and the reproduced TS is MPEG-decoded, converted into a video signal, and output (not shown).

Next, the state transition of the recording operation of the recording / reproducing apparatus according to the first embodiment will be described with reference to FIG. FIG. 3 is a diagram showing a state transition in the recording operation of the recording / reproducing apparatus according to the first embodiment. In FIG. 3, S1 is a recording waiting state in which no recording operation is performed, S2 is a state in which non-standardity is measured before the recording operation, and S3 is a state in which the recording operation is being performed.

Receiving a recording instruction from the user (not shown)
And the state of the present recording / reproducing apparatus is a recording waiting state S1.
Then, the process proceeds to S2 in which the non-standardity is measured. S2
In this example, the non-standardity is measured, and the time required for this is 5 frames (less than 0.2 seconds) as described above.
After measuring the non-standard degree, the process immediately moves to S3 and starts the recording operation. In S3, the recording operation is performed, but at the same time, the measurement of the non-standard degree is continued. Here, when the non-standard degree changes in the state of S3 and the state after the change continues for 10 seconds or more, the recording rate is changed and the compression encoding process is continued.
Then, when the recording operation is stopped, the process returns to S1 which is a recording waiting state.

As described above, in the recording / reproducing apparatus of the first embodiment, the synchronization signal detector 18 detects the vertical synchronization data and the horizontal synchronization data of the digitally converted video signal, and the non-standardity measuring unit 19 In the above, the difference between the longest line length and the shortest line length for each video field is detected from the vertical synchronization data and the horizontal synchronization data, and the difference is output as non-standardity.
In the above, the compression encoding is performed by setting the compression encoding rate according to the non-standard degree, and the video signal is digitally recorded, so that the compression encoding can be performed at the compression rate according to the state of the video signal. Thus, the storage area for recording the video signal can be efficiently used.

In the first embodiment, the input analog video signal is an NTSC video.
Even in the case of an image other than the NTSC system, the nonstandardity can be measured in a similar manner, and the compression ratio can be controlled based on the result.

Further, in the first embodiment, the non-standard degree measuring section 19 obtains the maximum fluctuation amount with respect to the normal line length and sets the maximum fluctuation amount as the non-standard degree. A cumulative value or an average value thereof may be obtained, and this may be used as the non-standard degree. Further, the non-standardity may be obtained from the field length or the frame length of the video instead of the line length in the manner described above. Alternatively, the number of synchronizations that are not detected at the position (time) despite the fact that the synchronization should be detected at the position (time) may be determined as the non-standard degree. The measurement of the non-standardity can be performed using a clock other than the A / D clock used in the first embodiment.

Further, as for the clock used for the non-standardity measurement, whether to use a clock line-locked or an unlocked clock to the synchronization signal of the input video signal is used for generating the line-locked clock. The performance may be determined by verifying the performance of the PLL or the like.
According to the result of the above verification, if the non-standardity can be accurately quantified using the line-locked clock, the line-locked clock is used. Otherwise, the unlocked free-run clock is used. May be used to measure non-standardity.

In the first embodiment, the compression / encoding processing unit 16 determines the bit rate on the basis of two pixels of non-standard degree. Since there are measurement errors due to the performance in D conversion, clock accuracy, and the like, it is preferable to set an optimal reference value according to the performance of each constituent circuit. Thus, control of the compression ratio according to the non-standard level and generation of the bit stream can be performed steadily. Also, the setting of the bit rate according to the non-standard degree may be determined by judging from the performance and specification of the recording / reproducing apparatus.

In the first embodiment, the non-standardity is measured during recording, but the measurement may be performed only at the start of recording. Further, the TS generated by the compression encoding processing unit 16 can be output to an external device such as a display device from a high-speed interface (not shown) such as IEEE1394.

In the first embodiment, the bit rate of the video data is set according to the non-standard level. However, the bit rate of the TS generated by multiplexing the compressed video data with the audio data or the like according to the non-standard level is set. The rate may be set. Also, the stream to be generated is not limited to TS,
Other streams such as PS (Program Stream) may be used.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 4 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 2 of the present invention. Here, the same reference numerals are used for the same configurations as those in the above-described embodiment, and description thereof will be omitted.

In FIG. 4, reference numeral 41 denotes an input terminal to which a modulated broadcast signal containing a digital broadcast program is input, and reference numeral 42 denotes a demodulator for demodulating the input digital broadcast wave to T.
The front-end unit 43 for outputting S receives the input T
A transport decoder 44 for extracting reference time information from S and separating and outputting program information, a video stream and an audio stream, a clock 44 for reproducing a system clock for decoding a digital broadcast program from the reference time information A playback unit 45 for decoding the video stream and the audio stream by MPEG;
It is a decoding unit.

Next, the operation of the recording / reproducing apparatus will be described. The front end unit 42 selects and demodulates a broadcast signal input from the input terminal 41 and outputs a TS to the transport decoder 43.
No. 3 takes out a packet (a data unit constituting the TS) containing one program from the input TS and, from the TS packets, PCR (Prog) which is reference time information.
ram Clock Reference)
It extracts and outputs S packets.

The transport decoder 43 and the clock reproducing section 44 use the PCR to generate the 27 MHz signal required for decoding the digital broadcast program, which is generally performed in a device including a circuit for receiving the digital broadcast program. Regenerate the system clock.

Here, reproduction of the system clock will be described with reference to FIG. FIG. 5 shows the second embodiment.
FIG. 3 is a configuration diagram relating to a system clock regeneration process in FIG.

In FIG. 5, reference numeral 431 denotes P which is reference time information from TS input from the front end unit 42.
TS to find and output TS packet containing CR
The packet filter unit 441 extracts a PCR from the TS packet containing the PCR and outputs the PCR.
Reference numeral 42 denotes a comparator that compares the counter value of the counter 445 with the PCR input from the PCR extraction unit 441, and outputs a comparison difference as a PWM signal. Reference numeral 443 filters the input PWM signal to filter high-frequency components. A low-pass filter (LPF) 444 for removing and outputting L
VCXO 445, which generates and outputs a clock having a frequency corresponding to the voltage level input from PF 443,
This is a counter that counts using the clock output from the CXO 444.

Next, the operation will be described. First,
The clock reproducing unit 44 is provided with the transport decoder 4
3 is compared with the counter value of the counter 445 corresponding to the internal clock of the clock reproducing unit 44 by the comparator 442, and the comparison value is referred to as PW.
The signal is output to the LPF 443 as an M signal. The LPF 443 filters the PWM signal, and outputs a clock having a frequency corresponding to the voltage level output from the LPF 443,
It is generated and output by the VCXO 444. That is,
If the PCR is larger, the clock reproducer 44 moves the internal clock (counting by the counter 445).
If the PCR is smaller, the operation of the internal clock is delayed to reproduce the system clock (output from the VCXO 444). Here, when there is a discontinuity in the PCR due to the start of the system clock reproduction by the clock reproducing unit 44 or the switching of the time base, the PCR is first set in the counter, and the comparator 442 is used from the next PCR. The PWM signal is generated, and the system clock is reproduced. The above is the description of the system clock reproduction.

The non-standard degree measuring section 19 measures the non-standard degree from the synchronization information detected by the synchronization detecting section 18 using a counter using the clock reproduced from the clock reproducing section 44. The method of measuring the non-standard degree in the non-standard measuring section 19 and the control of the generation of the compressed video data using the non-standard degree in the compression encoding processing section 16 are the same as those in the first embodiment.

As described above, in the recording / reproducing apparatus according to the second embodiment, the transport decoder 43 and the clock reproducing section 44 use a high-precision (for example, ± 30 ppm or less) clock for decoding a digital broadcast wave program. The non-standard degree is measured by the non-standard degree measuring unit 19 using the reproduced high-precision clock, and the compression encoding unit 16 sets the compression coding rate according to the value of the non-standard degree. Then, the digital video data is digitally recorded, so that the video signal can be compression-coded by the non-standard degree measured using a high-precision clock, and the video signal is recorded. The storage area can be used more efficiently.

In the second embodiment, a clock for measuring non-standardity is generated by using PCR. However, an SCR (System clock reference) which agrees with this is used.
ce) or the like.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 3 of the present invention. Here, the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted below.

In FIG. 3, reference numeral 61 denotes vertical sync data and horizontal sync data separated from the input digital video data, and separated according to the value of the non-standard degree input from the non-standard degree measuring means 19. This is a synchronization detection molding unit that replaces and outputs a synchronization signal.

Next, the operation of the recording / reproducing apparatus will be described. As in the first embodiment, the A / D converter 13 performs A / D conversion on the input analog video signal and outputs digital video data to the synchronization detection molding unit 61. The synchronization detecting and shaping unit 61, which has received the digital video data output from the A / D conversion unit 13, separates the vertical synchronization data and the horizontal synchronization data from the digital video data and outputs the separated data. Measures non-standardity from the input vertical synchronization data and horizontal synchronization data.

As a result of the measurement of the non-standard degree by the non-standard degree measuring means 19, the non-standard degree becomes equal to the standard value of the NTSC system by 700 in the field period by the vertical synchronization data.
If nsec (about 10 pixels) or less, the signal source of the analog video signal is identified as a standard signal (for example, a signal input from an antenna and output from a tuner),
This is notified to the synchronization detection molding unit 61, and the synchronization detection molding unit 61 replaces the horizontal synchronization data with horizontal synchronization data generated with the same horizontal synchronization period as the standard value of the NTSC system and outputs the data. .

As a result, the horizontal synchronizing data is replaced with a horizontal synchronizing signal having a cycle conforming to the standard, so that line jitter which may occur due to synchronization detection can be absorbed, and video data of a stable screen can be compressed and encoded in the subsequent stage. Processing unit 1
6 can be output.

The method of measuring the non-standard degree by the non-standard degree measuring unit 19 and the control of the generation of the compressed video data using the non-standard degree in the compression encoding processing unit 16 are described below.
This is the same as the first embodiment.

As described above, the recording / reproducing apparatus according to the third embodiment uses the non-standard degree measuring section 19 to calculate the non-standard degree Is measured, and from the value of the non-standard degree, the synchronization detection forming unit 61 determines whether or not the signal source of the analog video signal to be digitally recorded is a standard signal. The synchronous detection forming unit 61 processes the synchronous data to be replaced with synchronous data generated at the same cycle as the standard value of the NTSC system, and converts the digital video signal using the processed synchronous data. Since the compression encoding is performed at a compression ratio corresponding to the value of the non-standard degree and the digital recording is performed, the compression encoding processing unit 16 performs The video data of a stable screen, in which the line jitter generated at the time of signal synchronization detection is absorbed, can be compression-encoded at a compression rate according to the value of the non-standardity, and the storage area for recording the video signal is efficiently used. Can be used for

In the third embodiment, it is determined whether or not an analog video signal to be input is a standard signal using 700 nsec measured by the non-standard degree measuring section 19 as a reference for the non-standard degree. The reference value of the non-standardity set in advance is preferably set to an optimal value according to the performance of the constituent circuits and the like, whereby a sound judgment can be made.

In this case, the field period is measured when measuring the non-standardity. However, the same determination can be made by measuring and determining the average value of the line length in the field. The replacement of the synchronization data may be performed on the vertical synchronization data.

Further, when the non-standard degree measuring section 19 detects the synchronization data, a window (detection range) for performing the detection may be provided, and the synchronization may be detected within the window. By using
Unwanted erroneous detection can be prevented. For example,
When performing synchronization detection of a non-standard signal such as a special reproduction signal of a VTR, the period of the synchronization signal of the special reproduction signal differs from the period of the synchronization signal of the standard signal. The above window may be provided in a range where synchronization can be detected, or the period of the synchronization signal may be measured, and then a window may be provided at a position matching the period to perform synchronization detection. Further, the measurement of the period of the synchronization signal is equivalent to the measurement of the non-standard degree described in the first embodiment. Therefore, if it is detected that the signal is a special reproduction signal, the compression encoding processing unit 16 The compressed data may be generated by increasing the compression ratio.

(Embodiment 4) Next, Embodiment 4 of the present invention will be described with reference to FIGS. FIG. 7 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 4 of the present invention. Here, the same reference numerals are used for the same configurations as those in the above-described embodiment, and description thereof will be omitted below. In FIG.
Reference numeral 71 denotes a second unit that inputs an analog video signal before the filter processing is performed in the filter 12 and extracts synchronization data.
A / D converter.

Next, the operation of the recording / reproducing apparatus will be described. In the recording / reproducing apparatus according to the fourth embodiment, the second A / D converter 71 is provided for synchronous data extraction, and synchronous data is extracted from the signal before performing the filter processing.

Here, the filter 12 receives the input NT
An analog signal of the SC system is subjected to filter processing by switching a filter characteristic according to the non-standardity.
This switching is performed according to the value of the non-standard degree measured by the non-standard degree measuring unit 19 from the analog video signal not affected by the filter.

The method of measuring the non-standard degree by the non-standard degree measuring section 19 and the control of the generation of the compressed video data using the non-standard degree are the same as those in the first embodiment. Here, the filter processing will be described with reference to FIG. FIG. 8A is a diagram showing the filter characteristics of the filter according to the fourth embodiment.

If the value of the non-standard degree is increased by the non-standard degree measuring section 19, the cutoff frequency of the filter 12 is changed from F1 to F2 as shown in FIG.
To change to smaller. At this time, as the clock for the second A / D conversion, a clock having a frequency that is twice or more the cutoff frequency is used. If the value of the non-standardity is decreasing, the cutoff frequency of the filter 12 is changed from F2 to F1, for example, so as to increase.

Then, when the cutoff frequency decreases to 3.4 MHz or less, the video data processing unit 14
The number of effective pixels per line of the input digital video signal is scaled down to half the pixel data of the normal number of pixels and output to the formatter 15, and the formatter 15 converts the scaled-down video data and the synchronization signal. , To the compression / encoding processing unit 16.

The compression / encoding processing section 16 compression-encodes the input digital video data at a compression rate corresponding to the value of the non-standard degree input from the non-standard degree measuring section 19,
Generate and output a TS. For example, if the cut-off frequency is 6.75 MHz according to the value of the non-standard degree, the digital data rate is 6 Mbps, and the cut-off frequency is 3 Mbps according to the non-standard value. When the frequency becomes .4 MHz, the digital data rate is set to 4 Mbps. The compression encoding unit 16 compresses the audio data to generate compressed audio data, multiplexes the compressed video data with the compressed audio data (not shown), and outputs a TS.

The above-mentioned non-standardity measuring section 19 performs the second A
The non-standardity is measured from the signal which is not affected by the filter 12 which is used by switching the filter characteristics by using the / D conversion unit 71. As shown in FIG. From the detected synchronization data, the VBI period (Vert
ial Blanking Interval), and the non-standard degree of the digital video signal may be measured during the VBI period.

An example of measuring the non-standardity from the noise voltage level will be described below with reference to FIG.
FIG. 8B is a diagram illustrating a configuration for detecting non-standardity during the VBI period of the synchronization data of the video signal in the fourth embodiment.

The non-standard degree measuring section 19 determines the synchronization period of the input digital video data, and extracts ten digital video data which should be at a constant potential level in the video signal standard during one vertical blanking period. And the difference between the two. If the difference value is 4 or less, the analog video signal is identified as noise-free. If the difference value is 10 or more, the analog video signal is identified as having noise. Then, the non-standard degree measuring unit 19 outputs the total of the difference values as the non-standard degree. In addition, the non-standard degree measuring unit 19 outputs a signal indicating whether or not the period is during the VBI period to the filter 12. The filter 12 receiving this signal, during the measurement of this non-standard degree,
The filtering for the image area is not performed, and the filtering is performed during a period other than the VBI period, that is, during the effective image period, to reduce noise components.

The compression / encoding processing section 16 uses the non-standard degree input from the non-standard degree measuring section 19 to compression-code the input digital video data conforming to the ITUR601 standard, generates a TS, and outputs the TS. I do. At this time, if the non-standard degree is less than 10, the digital video data rate is compressed to 6 Mbps, and if the non-standard degree is 10 or more, the digital video data rate is compressed to 4 Mbps to generate compressed video data. The compression / encoding processing unit 16
Generates compressed audio data by compressing audio data, multiplexes compressed video data and compressed audio data (not shown), and outputs a TS. The above is the synchronization detector 1
8 illustrates a case where the VBI period is identified from the detected synchronous data and the non-standardity is measured during the VBI period.

As described above, in the recording / reproducing apparatus according to the fourth embodiment, the second A / D converter 71 detects the synchronization data from the analog video signal before being subjected to the filter processing, and converts the synchronization data into a digital signal. The non-standardity indicating the state of the video signal is measured, and a filter 12 is set in accordance with the non-standardity.
The compression characteristics are changed and the compression coding rate is set according to the non-standardity to perform compression coding and digital recording. Therefore, the cut-off frequency of the filter 12 is changed and the digital video data is changed. Is reduced in accordance with the value of the non-standardity not affected by the filtering process, and the storage area for recording the digital video data can be used efficiently.

Further, the synchronization detecting section 18 identifies the VBI period of the digital video signal, detects the noise of the digital video data during the VBI period, sets the total number of the noise to a non-standard degree, Since the compression ratio is set according to the value and the compression encoding process is performed, the storage area for recording the digital video data can be used efficiently.

The various reference values for setting the bit rate in the fourth embodiment may be processed by setting optimal reference values according to the performance of the constituent circuits. Further, the reference value of the non-standard degree for determining the bit rate in the fourth embodiment is DNR (Digital Noise
eReduction) By setting an optimal reference value according to the performance of a constituent circuit including a circuit and the like, the control of the compression ratio according to the non-standard level and the generation of the bit stream can be performed steadily.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 15 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 5 of the present invention. Here, the same reference numerals are used for the same configurations as those in the above-described embodiment, and description thereof will be omitted.

In FIG. 9, reference numeral 91 denotes a digital VH which is a VTR capable of analog recording and digital recording.
S and 92 are recording method determination units that determine and output a recording method based on the non-standardity, and 93 is a display panel that specifies the recording method to the outside.

Next, the operation of the recording / reproducing apparatus will be described. If the non-standard degree measured by the non-standard degree measuring unit 19 described in the fourth embodiment is less than 20, the recording method determining unit 92 sets the recording method of the digital VHS 91 to the digital recording method and digitally records the video signal. If the non-standard degree is 20 or more, the recording method of the digital VHS 91 is set to the analog recording method, and the video signal is analog-recorded. In addition, the display panel 93 clearly indicates to the user which recording method is selected by characters or symbols, thereby providing a convenient recording and reproducing apparatus.

Also, as shown in FIG.
A buffer 911 is provided in a stage preceding the buffer 91 to temporarily store the TS output from the compression encoding processing unit 16 and
When the HS 91 records the TS, the recording scheme determination unit 92 selects a recording speed according to the TS rate, reads data from the buffer 911 at the maximum recording rate, and records the data. As a result, recording can be efficiently performed using a recording area such as a video cut tape as a recording medium. When reproducing the above TS, T
The playback is performed at the S original rate and the through output is performed without using the buffer 911, or the playback is performed at the rate at which the data was recorded in the digital VHS 91, and is temporarily stored in the buffer 911 and then played back at the TS original rate. Output.
The recording and reproduction using the buffer 911 are performed by the digital VHS 91 according to the buffer amount of the buffer 911.
This is possible by detecting the buffer occupancy and performing control such as intermittent running of the tape, for example.

As described above, in the recording / reproducing apparatus according to the fifth embodiment, the recording method determining section 92 determines the recording method of whether the video signal is analog recording or digital recording based on the value of the non-standard degree. Since the recording is performed in the storage area, the recording / reproducing apparatus can select and determine the recording method according to the state of the video signal to be recorded.

Further, a buffer 991 is provided in front of the digital VHS 91 to temporarily store the TS output from the compression / encoding processing section 16, and the digital VHS 91 selects a recording speed in accordance with the TS rate. Since the digital video signal is recorded in the storage area, the recording / reproducing apparatus can select and determine the storage speed according to the TS rate.

Further, regarding the time information existing in the TS, at the time of output, the time information is replaced with a valid value,
Alternatively, if a conventional method is used in which a time code is added to reproduce the TS packet timing at the time of recording and recording is performed, and the time code is output at the time of reproduction, an effective method is provided. The TS can be reproduced and output.

In the fifth embodiment, the recording method determining section 92 determines the recording method for recording the video signal. However, the mode in which the user determines the recording method and the recording method determining section 92 determine the recording method. It is also possible to have both a mode for determining the recording method. Similarly, a mode in which the user determines the recording speed and a mode in which the recording method determination unit 92 determines the recording speed and performs recording and reproduction using the buffer 911 may be provided.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 12A is a configuration diagram of a recording / reproducing apparatus according to the sixth embodiment of the present invention. FIG. 12A is a diagram illustrating processing up to formation of a VBI signal in the digital OSD according to the sixth embodiment. (B) is a diagram showing a process of the analog OSD of the sixth embodiment. Here, the same components as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted below.

In FIG. 11, reference numeral 111 denotes an OS which detects VBI information and a duplication prevention signal of the video signal and the reproduction signal, and
A digital OSD for synthesizing the D information and re-forming the VBI information and the duplication preventing signal. After inputting the digital video data and synthesizing the OSD information,
Output after performing D / A conversion. That is, FIG.
As shown in (a), in S120, the video data processing unit 14 detects VBI information and a duplication prevention signal, and
At 21, a microcomputer (not shown) notifies the digital OSD 111 of the detection result, and at S122, the digital OSD 111 re-forms and outputs a VBI signal or a duplication prevention signal based on the detection result. That is, in the digital OSD 111, the replacement of the VBI signal and the copy prevention signal is performed. An OSD method determination unit 112 determines whether to use the digital OSD 111 or the analog OSD 113 in accordance with the non-standard degree from the non-standard degree measurement unit 19.
As illustrated in FIG. 2 (b), only the OSD portion without the replacement of the VBI information and the copy protection signal is performed (FIG. 12).
This is an analog OSD for performing analog synthesis on (x part of (b)). That is, in the analog OSD 113, the VBI
No detection or reconstruction of information or copy protection signals is performed.

Next, the operation of the recording / reproducing apparatus will be described. In the recording / reproducing apparatus according to the sixth embodiment, when the analog video signal is output without being combined with the OSD information, if the non-standard degree described in the fourth embodiment is less than 2, it is output as it is.

When the analog video signal is output without being combined with OSD information, if the non-standard degree described in the fourth embodiment is 3 or more and less than 10, the digital OS
By D111, the VBI signal and the duplication preventing signal are reformed. That is, these signals are replaced in the digital OSD 111, but the OSD information is output without being combined. It has been verified in advance that this relocation is performed accurately and accurately. When the relocation is performed within a range in which the relocation is performed accurately, the OSD information is synthesized and the VBI
It is possible to output a signal in which the waveform of the information is shaped or a signal in which the OSD information is synthesized and the synchronization signal is shaped, and the information existing in the VBI period can be detected more reliably.

Further, when the analog video signal is output without being combined with OSD information, if the non-standard degree described in the fourth embodiment is 10 or more, the above-described replacement is not performed accurately. Output through.

Next, when the analog video signal is combined with the OSD information and output, the OSD method determination unit 112
If the non-standardity is 10 or more and the OSD occupation ratio in the entire video is 50% or more, the digital OSD
Select 111.

When the analog video signal is combined with OSD information and output, the non-standardity is 10 or more,
If the OSD occupation ratio in the entire video is less than 50%, the analog OSD 113 is selected.

Further, when the analog video signal is combined with OSD information and output, if the non-standardity is less than 10, the digital OSD 111 is selected.

That is, when the OSD occupation ratio in the whole video is 50% or more, the usefulness of the OSD information is prioritized. Therefore, the non-standardity is 10 or more and the replacement of the VBI information is performed normally. There is no problem if you do not. OSD
When the occupation ratio is less than 50%, even if the OSD information is useful, the usefulness of the original video for the user also exists.

As described above, in the recording / reproducing apparatus according to the sixth embodiment, the OSD method determining section 112 combines the video data with the above-mentioned video data according to the value of the non-standard degree or the OSD occupancy according to the state of the video signal. OSD information to be output can be appropriately controlled and output.

The reference value set for the non-standard degree is:
An optimum reference value may be set according to the performance of the constituent circuits. Also, the TS generated by the compression encoding processing unit 16
Can be output from a high-speed interface (not shown) such as IEEE1394 to an external device such as a display device.

[0131]

According to the recording / reproducing apparatus of the present invention (claim 1), there is provided a recording / reproducing apparatus for compressing and encoding digital video data to generate and record a bit stream,
A filter for filtering input analog video data, A / D conversion means for converting the analog video data into digital video data, and a synchronization for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data Detecting means, from the synchronization information, non-standardity measuring means for measuring non-standardity indicating the state of the digital video data, and the digital video data,
Since there are provided compression encoding means for compression-encoding at a compression rate corresponding to the non-standardity to generate a bit stream, and recording means for recording the bit stream, the recording area for recording the digital video data can be efficiently used. Can be used

According to the recording / reproducing apparatus according to the present invention (claim 2), in the recording / reproducing apparatus according to claim 1, the non-standard degree measuring means includes a standard signal of the synchronization information detected from the digital video data. The displacement from the standard synchronization data is measured by a counter and output as a non-standard degree, and the compression-encoding means determines that the value of the non-standard degree is larger than a preset reference value of the non-standard degree. For example, since the bit stream is generated such that the compression rate is reduced and the data amount of the digital video data is increased, the digital video data in which the non-standard degree is increased from a preset reference value is recorded in a recording area. It can be recorded efficiently.

According to the recording / reproducing apparatus according to the present invention (claim 3), in the recording / reproducing apparatus according to claim 1, the non-standard degree measuring means includes a standard signal of the synchronization information detected from the digital video data. The displacement from the standard synchronization data is measured by a counter and output as a non-standard degree, and the compression encoding unit determines that the value of the non-standard degree decreases from a preset reference value of the non-standard degree. For example, since the bit stream is generated such that the compression rate is increased and the data amount of the digital video data is reduced, the digital video data in which the non-standardity is reduced from a preset reference value is recorded in a recording area. It can be recorded efficiently.

According to the recording / reproducing apparatus according to the present invention (claim 4), in the recording / reproducing apparatus according to claim 2 or 3, the non-standard degree measuring means detects the synchronization information using a counter. , The field period length or the frame period length, the line length, the difference from the mutual difference or the normal value, or their average value or accumulated value was measured and output as a non-standard degree. , The non-standardity, which is the state of the video data, can be measured.

According to the recording / reproducing apparatus according to the present invention (claim 5), in the recording / reproducing apparatus according to any one of claims 1 to 4, the non-standardity measuring means is an A / D converter in the A / D converting means. Since the non-standardity is measured from the synchronization information by the counter using the conversion clock, the non-standardity can be measured using the clock used for the A / D conversion.

According to the recording / reproducing apparatus of the present invention (claim 6), the recording / reproducing apparatus of claim 1 further comprises digital broadcast reproducing means for demodulating and decoding / reproducing a digital broadcast wave. The degree measuring means measures the non-standardity from the synchronization information by a counter using a clock synchronized with a clock used for a process of forming a broadcast wave at a broadcasting station or the like. The non-standardity can be measured.

According to the recording / reproducing apparatus according to the present invention (claim 7), in the recording / reproducing apparatus according to claim 6, the clock used for the process of forming a broadcast wave at the broadcast station or the like uses the clock of the broadcast wave. PCR (Program Clock) which is reference time information existing in a digital stream.
Reference) or SCR (SystemC)
Since the data is reproduced using the “lock reference”, a highly accurate clock used for the measurement of the non-standard degree can be obtained.

According to the recording / reproducing apparatus according to the present invention (claim 8), in the recording / reproducing apparatus according to claim 1, the synchronization detecting means determines the synchronization timing of the digital video data based on the non-standard value. If it is determined that the synchronization timing is equal to the synchronization timing of the standard signal, the synchronization data of the digital video data is replaced with the synchronization signal having the cycle of the standard signal, and the synchronization information of the digital video data is detected. In this case, the video data can be compression-encoded by using a stable synchronization signal by absorbing line jitter generated at that time.

According to the recording / reproducing apparatus according to the present invention (claim 9), in the recording / reproducing apparatus according to claim 1, the synchronization information is detected from the input analog video signal before being filtered by the filter. The second A
/ D conversion means, wherein the non-standardity measuring means comprises:
Since the non-standardity is measured from the synchronization information detected by the second A / D conversion means, the synchronization information of the video signal is extracted from the analog video signal before performing the filtering, and the filtering is performed. Unaffected non-standardity can be measured.

According to the recording / reproducing apparatus according to the present invention (claim 10), in the recording / reproducing apparatus according to claim 9, the filter is measured from the synchronization information detected by the second A / D conversion means. Depending on the value of the above-mentioned non-standardity,
Since the filtering is performed by changing the characteristics of the filter, the filtering according to the state of the video data can be performed by using the non-standardity not affected by the filtering.

According to the recording / reproducing apparatus according to the present invention (claim 11), in the recording / reproducing apparatus according to claim 10, the filter is measured from the synchronization information detected by the second A / D conversion means. If the value of the non-standardized value is larger than a preset reference value of the non-standardized value, the cutoff frequency of the filter is reduced and the filtering is performed. The filter processing of the increased digital video data is appropriately performed, and the storage area for recording the video data can be efficiently used.

According to a recording / reproducing apparatus according to the present invention (claim 12), in the recording / reproducing apparatus according to claim 10, the filter is measured from the synchronization information detected by the second A / D conversion means. If the value of the non-standard degree is smaller than the preset non-standard degree reference value, the cut-off frequency of the filter is increased and filtering is performed. Properly filter the reduced digital video data,
The storage area for recording the video data can be used efficiently.

According to the recording / reproducing apparatus according to the present invention (claim 13), in the recording / reproducing apparatus according to claim 11 or 12, the second A / D conversion means is twice the cut-off frequency. Since the A / D conversion is performed using the above clock, the recording area for recording the video data can be used efficiently.

According to the recording / reproducing apparatus according to the present invention (claim 14), in the recording / reproducing apparatus according to claim 1, the non-standard degree measuring means measures the amount of noise from the digital video data to determine the non-standard level. And the compression encoding means reduces the compression ratio if the value of the non-standard degree is larger than a preset reference value of the non-standard degree, and outputs the data of the digital video data. Since the bit stream is generated such that the amount increases, the digital video data whose non-standardity has increased from a preset reference value can be efficiently recorded in a recording area.

According to the recording / reproducing apparatus according to the present invention (claim 15), in the recording / reproducing apparatus according to claim 1, the non-standard degree measuring means measures the amount of noise from the digital video data to determine the non-standard level. And the compression encoding means increases the compression ratio if the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, and outputs the data of the digital video data. Since the bit stream is generated so as to reduce the amount, the digital video data in which the non-standardity has decreased from a preset reference value can be efficiently recorded in a recording area.

According to a recording / reproducing apparatus according to the present invention (claim 16), in the recording / reproducing apparatus according to claim 14 or 15, the non-standard degree measuring means is configured to reduce a noise amount from one period of the digital video data. Is measured and output as the non-standard degree, the non-standard degree of the digital video data can be measured from one period of the video data.

According to the recording / reproducing apparatus according to the present invention (claim 17), in the recording / reproducing apparatus according to claim 16, the period in which the non-standardity measuring means measures the noise amount is as follows:
Since the period corresponding to the vertical blanking period of the digital video data is set, the non-standard degree of the digital video data can be measured from the vertical blanking period of the video data.

According to a recording / reproducing apparatus according to the present invention (claim 18), in the recording / reproducing apparatus according to claim 14 or 15, the non-standard degree measuring means includes a synchronizing signal section for the digital video data. Since the noise existing in the reference portion is detected and the noise amount that is the sum of the noise is output as the non-standardity, the non-standardity of the digital video data is stored in the reference portion such as the synchronization signal portion of the video data. The measurement can be performed by detecting the noise.

According to the recording / reproducing apparatus according to the present invention (claim 19), in the recording / reproducing apparatus according to claim 16, the non-standardity measuring means includes a potential in a reference section such as a synchronous signal section of the digital video data. Is measured as noise, so that the noise of the digital video data can be detected.

According to the recording / reproducing apparatus according to the present invention (claim 20), in the recording / reproducing apparatus according to claim 16, the non-standardity measuring means includes a potential in a reference section such as a synchronous signal section of the digital video data. Is measured as noise, the noise of the digital video data can be detected.

According to the recording / reproducing apparatus according to the present invention (claim 21), in the recording / reproducing apparatus according to claim 16, the non-standardity measuring means is configured to control the potential of a reference portion such as a synchronization signal portion of the digital video data. Since the departure period and the departure amplitude are measured as noise, the noise of the digital video data can be detected.

According to the recording / reproducing apparatus of the present invention (claim 22), the recording / reproducing apparatus according to claim 1, further comprising a resolution conversion means for changing the resolution of the digital video data and outputting the digital video data, Since the converting means compression-codes the digital video data whose resolution has been changed by the resolution converting means to generate a bit stream,
The storage area for recording the digital video data can be used efficiently.

According to the output device of the present invention (claim 23), there is provided an output device for compressing and encoding digital video data to generate and output a bit stream, comprising: a filter for filtering input analog video data; A / D conversion means for converting the analog video data into digital video data; synchronization detection means for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data; A non-standard degree measuring means for measuring the non-standard degree indicating the state of data; and a compression code for compression-encoding at a compression rate according to the non-standard degree and adjusting a data amount of the digital video data to generate a bit stream. And a digitizer for outputting the bit stream to an external device connected to the output device. Since a Le interface, the processed compressed video signal to the storage area can be efficiently utilized for recording digital video data can be output to the external device.

According to a recording / reproducing apparatus according to the present invention (claim 24), in the recording / reproducing apparatus according to any one of claims 1 to 22, the recording method of the video data is determined by the non-standard value. That is, a recording method determining means for selecting and recording either the digital recording method or the analog recording method is further provided. The recording / reproducing apparatus can select and determine based on the value of the standard degree.

According to a recording / reproducing apparatus according to the present invention (claim 25), in the recording / reproducing apparatus according to claim 24, the recording method determining means determines that the value of the non-standard degree is the non-standard value set in advance. If the value exceeds the reference value, the recording system of the video data is switched from the digital recording method to the analog recording method. Can be selected for analog recording to prevent an increase in image quality deterioration due to the compression encoding processing of the video signal.

According to the recording / reproducing apparatus according to the present invention (claim 26), in the recording / reproducing apparatus according to claim 24, the recording method determining means sets the value of the non-standard degree to the non-standard value set in advance. If the non-standard value decreases below the reference value, the recording / reproducing apparatus switches the recording method of the video data from the analog recording method to the digital recording method. Can be selected for digital recording.

According to a recording / reproducing apparatus according to the present invention (claim 27), in the recording / reproducing apparatus according to claim 24, the recording method determining means comprises: a mode in which a user determines the recording method; Has a mode for determining the recording method, the user can also determine the recording method of the video signal to be recorded, and a more convenient recording / reproducing apparatus can be provided.

According to a recording / reproducing apparatus according to the present invention (claim 28), in the recording / reproducing apparatus according to claim 24, a buffer means for temporarily storing the bit stream and a bit stream temporarily stored in the buffer means are provided. Recorded on a recording medium, or further comprising a recording and reproducing means for reproducing a bit stream recorded on the recording medium, by the recording and reproducing means, when recording the bit stream, read the bit stream from the buffer means, When recording at a rate different from the rate of the bit stream and reproducing the bit stream, the bit stream is reproduced and output at the rate of the bit stream without using the buffer means, or reproduced at the rate at the time of recording. Buffer in the buffer means, Since reproduces and outputs with bets, even at a rate other than the original rate of the video signal, the recording can be reproduced.

According to the recording / reproducing apparatus of the present invention (claim 29), in the recording / reproducing apparatus according to claim 28, since the recording / reproducing means records the bit stream and the rate information of the bit stream, The storage area for recording the video data can be used efficiently.

According to the recording / reproducing apparatus of the present invention (claim 30), in the recording / reproducing apparatus of claim 28,
When the recording method for recording the bit stream temporarily stored in the buffer means on the recording medium is a digital recording method, the minimum recording speed is determined based on the recordable recording speed corresponding to the bit stream rate. Is selected, the video data temporarily stored in the buffer can be read at the maximum rate and efficiently stored in the recording area.

According to a recording / reproducing apparatus according to the present invention (claim 31), in the recording / reproducing apparatus according to claim 30, the recording method determining means comprises: a mode in which a user determines the recording speed; Since the means has a mode for determining the recording speed, the user himself can select the recording speed of the video signal to be recorded, thereby providing a more convenient recording / reproducing apparatus.

According to the recording / reproducing apparatus according to the present invention (claim 32), in the recording / reproducing apparatus according to any one of claims 25 to 31, the non-standard degree or the above-mentioned non-standard degree is determined by an OSD, a display panel or the like. Since a display means for notifying the user that the recording method and the recording speed have been switched is further provided, a more convenient recording / reproducing apparatus can be provided.

According to the recording / reproducing apparatus according to the present invention (claim 33), in the recording / reproducing apparatus according to claim 1, VBI signal forming means for replacing VBI information of the digital video data and forming a synchronizing section. The VBI signal forming means further comprises a VBI signal of the digital video data.
A signal of the BI information is formed and a video signal is output. If the value of the non-standard degree is larger than a preset reference value of the non-standard degree, the path is switched to the path using the VBI signal forming means, and Since the signal is output, the VBI signal and the duplication prevention signal of the video data whose reference value has been increased from the value of the non-standard degree can be re-formed, and the signal can be replaced and output.

According to the recording / reproducing apparatus according to the present invention (claim 34), in the recording / reproducing apparatus according to claim 1, VBI signal forming means for replacing the digital video signal with VBI information and forming a synchronizing section. And the above V
The BI signal forming means outputs the VB of the digital video data.
A signal of the I information is formed and a video signal is output. If the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, the path is switched to a path not using the VBI signal forming means. Since the video signal is output, it is possible to output the video data whose reference value is smaller than the value of the non-standard degree, without performing signal replacement.

According to the output device of the present invention (claim 35), in the output device of claim 23, a VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section is further provided. The VBI signal forming means forms a signal of VBI information of the digital video data and outputs a video signal. According to the non-standard value, a path using the VBI signal forming means; Since the video signal is output by switching to a path that does not use the means, it is selected whether to replace the video signal with a VBI signal in accordance with the value of the non-standard degree, and a storage area for recording the video signal is provided. Can be output as a compressed video signal that has been processed so that can be used efficiently.

According to the recording / reproducing apparatus of the present invention (claim 36), in the recording / reproducing apparatus of claim 1, ODS information is added to a video signal by the non-standardity and OSD occupancy of the digital video data. OSD method determining means for determining a method of synthesizing is further provided. In the OSD method, VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section corrects synchronization and synthesizes OSD information. OSD method A for outputting
An OSD method B for synthesizing the OSD information without re-forming the VBI information and the synchronizing unit. The OSD method determining means determines the OSD information based on the nonstandardity and the OSD occupancy.
Since either the SD system A or the OSD system B is selected and the video signal is combined with the OSD information and output, the OSD can be appropriately controlled and output according to the state of the video signal.

According to a recording / reproducing apparatus according to the present invention (claim 37), in the recording / reproducing apparatus according to claim 36, the OSD method determining means combines OSD information with the video signal or the reproduced signal and outputs the synthesized signal. In this case, if the value of the non-standard degree and the OSD occupancy increase from a preset reference value, the OSD information is combined with the video signal using the OSD method A and output. When the non-standardity and the OSD occupancy are increasing, the VBI signal forming means can correct the synchronization and synthesize and output the OSD information, so that the OSD can be appropriately adjusted according to the state of the video signal. And output.

According to the recording / reproducing apparatus according to the present invention (claim 38), in the recording / reproducing apparatus according to claim 36, the OSD method determining means may combine the output signal with OSD information and output the synthesized signal. If the value of the non-standard degree increases from a preset reference value and the OSD occupancy falls below a preset reference value, the OSD method B
, The OSD information is combined with the video signal and output, so that the OSD can be appropriately controlled and output according to the state of the video signal.

According to the recording / reproducing apparatus according to the present invention (claim 39), in the recording / reproducing apparatus according to claim 36, the OSD method determining means may combine the output signal with OSD information and output the combined signal. If the value of the non-standard degree is smaller than a preset reference value, the video signal is combined with the OSD information using the OSD method A or the OSD method B and output. Can correct the synchronization to synthesize the OSD information, or can synthesize the OSD information without reforming the VBI information and the synchronizing means, and can appropriately control the OSD according to the state of the video signal. Can be output.

According to the output device of the present invention (claim 40), in the output device of claim 23, a method of synthesizing ODS information with a video signal based on the non-standardity and OSD occupancy of the digital video data. OSD that is
OSD system determining means for determining a system, wherein the VBI signal forming means for replacing the VBI information of the digital video signal and forming the synchronizing section corrects the synchronization and adjusts the OS.
OSD system A that combines and outputs D information, and VBI
An OSD method B for synthesizing OSD information without re-forming information or a synchronizing unit. The OSD method determining means determines the OSD method A based on the non-standardity and the OSD occupancy.
And the OSD method B are selected and the OSD information is combined with the video signal and output. Therefore, the OSD method A and the OSD method B are selected according to the non-standardity and the OSD occupancy value. Select one of
A video signal obtained by combining SD information can be output.

[Brief description of the drawings]

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

FIG. 2 is an example of a horizontal synchronization pulse detected by a synchronization detection unit according to the first embodiment of the present invention.

FIG. 3 is a state transition diagram relating to a recording operation according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a configuration diagram relating to clock recovery processing according to the second embodiment of the present invention;

FIG. 6 is a configuration diagram of a recording and reproducing device according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a recording / reproducing device according to a fourth embodiment of the present invention.

FIG. 8 is a filter characteristic diagram and a configuration diagram for detecting non-standardity during VBI according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a recording / reproducing device according to a fifth embodiment of the present invention.

FIG. 10 is a configuration diagram of a recording / reproducing apparatus according to Embodiment 5 of the present invention.

FIG. 11 is a configuration diagram of a recording / reproducing device according to a sixth embodiment of the present invention.

FIG. 12 is an explanatory diagram of an OSD according to the sixth embodiment of the present invention.

FIG. 13 is a configuration diagram of a conventional example.

FIG. 14 is a configuration diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Input video signal 12 Filter 13 A / D conversion part 14 Video data processing part 15 Formatter 16 Compression encoding processing part 17 Recording / reproduction part 18 Synchronization detection part 19 Non-standard degree measurement part 41 Input RF signal 42 Front end part 43 Transport Decoder 44 Clock recovery unit 45 MPEG decoding unit 46 Output video signal 61 Synchronization detection molding unit 71 Second A / D conversion unit 91 Digital VHS 92 Recording method determination unit 93 Display panel 111 Digital OSD 112 OSD method determination unit 113 Analog OSD 431 TS packet filter unit 441 PCR extraction unit 442 Comparator 443 Low-pass filter (LPF) 444 VCXO oscillator 445 Counter 911 Buffer 1311 NTSC decoder 1312 Compression encoding unit 1313 Recording / reproducing unit 1 14 decoding unit 1315 NTSC encoder 1411 frame frequency converter 1412 noise filter 1413 encoder

Continued on the front page F term (reference) 5C053 FA03 FA21 GA01 GB21 JA16 JA26 KA12 KA20 KA25 LA04 LA06 5C059 KK00 SS11 TA00 TA69 TC00 TD12 UA02 5D044 AB07 BC01 CC05 DE15 DE49 DE75 EF03 EF05 FG10 FG18 GK08 GK12

Claims (40)

[Claims] 1. A recording / reproducing apparatus for compressing and encoding digital video data to generate and record a bit stream, comprising: a filter for filtering input analog video data; and converting the analog video data to digital video data. A / D conversion means, synchronization detection means for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data, and non-standardity indicating a state of the digital video data is measured from the synchronization information. Non-standard degree measuring means, compression encoding means for compression-encoding the digital video data at a compression rate according to the non-standard degree to generate a bit stream, and recording means for recording the bit stream A recording / reproducing device characterized by the above-mentioned. 2. The recording / reproducing apparatus according to claim 1, wherein the non-standardity measuring means measures a displacement of the synchronization information detected from the digital video data from a standard synchronization data of a standard signal by a counter. If the value of the non-standard degree is larger than a preset reference value of the non-standard degree, the compression encoding means reduces the compression ratio and outputs the digital image data. A recording / reproducing apparatus, wherein a bit stream is generated such that a data amount of data increases. 3. The recording / reproducing apparatus according to claim 1, wherein the non-standard degree measuring means measures a displacement of the synchronization information detected from the digital video data from a standard synchronization data of a standard signal by a counter. The compression encoding means increases the compression ratio if the value of the non-standard degree is smaller than a preset reference value of the non-standard degree. A recording / reproducing apparatus, wherein a bit stream is generated such that a data amount of data is reduced. 4. The recording / reproducing apparatus according to claim 2, wherein the non-standardity measuring means detects a field period length, a frame period length, and a line length detected from the synchronization information using a counter. Recording / reproducing apparatus for measuring a mutual difference or a difference from a normal value, or an average value or a cumulative value thereof and outputting the measured value as a non-standard degree. 5. The recording / reproducing apparatus according to claim 1, wherein the non-standardity measuring means uses a counter using an A / D conversion clock in the A / D conversion means to calculate the non-standardity from the synchronization information. A recording / reproducing apparatus, wherein the non-standardity is measured. 6. The recording / reproducing apparatus according to claim 1, further comprising digital broadcast reproducing means for demodulating and decoding / reproducing the digital broadcast wave, wherein said non-standard degree measuring means converts the broadcast wave from a broadcast station or the like. A recording / reproducing apparatus, wherein the non-standardity is measured from the synchronization information by a counter using a clock synchronized with a clock used for a forming process. 7. The recording / reproducing apparatus according to claim 6, wherein the clock used for forming the broadcast wave at the broadcast station or the like is PCR (reference time information) present in a digital stream of the broadcast wave. ProgramCloc
k Reference) or SCR (System
a recording / reproducing apparatus, wherein the recording / reproducing apparatus reproduces the data using a clock reference. 8. The recording / reproducing apparatus according to claim 1, wherein the synchronization detecting means identifies the synchronization timing of the digital video data as being equivalent to the synchronization timing of a standard signal, based on the value of the non-standard degree. In this case, the synchronous data of the digital video data is replaced with a synchronous signal having a cycle of a standard signal and output. 9. The recording / reproducing apparatus according to claim 1, further comprising a second A / D converter for detecting the synchronization information from the input analog video signal before being filtered by the filter, The recording / reproducing apparatus, wherein the non-standard degree measuring means measures the non-standard degree from the synchronization information detected by the second A / D conversion means. 10. The recording / reproducing apparatus according to claim 9, wherein the filter is configured to determine the non-standard degree according to a value of the non-standardity measured from the synchronization information detected by the second A / D converter. A recording / reproducing apparatus, wherein filtering is performed by changing the characteristics of a filter. 11. The recording / reproducing apparatus according to claim 10, wherein the filter is configured such that a value of the non-standardity measured from the synchronization information detected by the second A / D converter is set in advance. The recording / reproducing apparatus according to claim 1, wherein, when the value exceeds the non-standard degree reference value, the cut-off frequency of the filter is reduced to perform the filtering. 12. The recording / reproducing apparatus according to claim 10, wherein the filter has a value of a non-standard degree measured from the synchronization information detected by the second A / D conversion means.
If it is smaller than the preset non-standard degree reference value,
A recording / reproducing apparatus, wherein a filter is cut by increasing a cutoff frequency of the filter. 13. The recording / reproducing apparatus according to claim 11, wherein the second A / D conversion means performs A / D conversion using a clock having a frequency twice or more the cutoff frequency. A recording / reproducing apparatus characterized by the above-mentioned. 14. The recording / reproducing apparatus according to claim 1, wherein the non-standard degree measuring means measures a noise amount from the digital video data and outputs the same as the non-standard degree. If the value of the non-standard degree is larger than a preset reference value of the non-standard degree, the compression rate is reduced and a bit stream is generated so that the data amount of the digital video data increases. Recording / reproducing apparatus characterized by the above-mentioned. 15. The recording / reproducing apparatus according to claim 1, wherein the non-standard degree measuring means measures a noise amount from the digital video data and outputs the same as the non-standard degree. If the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, the compression rate is increased and a bit stream is generated such that the data amount of the digital video data is reduced. Recording / reproducing apparatus characterized by the above-mentioned. 16. The recording / reproducing apparatus according to claim 14, wherein the non-standard degree measuring means measures a noise amount from one period of the digital video data and outputs the same as the non-standard degree. Recording / reproducing apparatus characterized by the above-mentioned. 17. The recording / reproducing apparatus according to claim 16, wherein a period during which the non-standardity measuring unit measures the noise amount is a period corresponding to a vertical blanking period of the digital video data. Recording and reproducing device. 18. The recording / reproducing apparatus according to claim 14, wherein said non-standardity measuring means detects noise present in a reference part such as a synchronization signal part of said digital video data, and detects said noise. A recording / reproducing apparatus, which outputs a total amount of noise as a non-standard degree. 19. The recording / reproducing apparatus according to claim 16, wherein said non-standard degree measuring means sets a deviation period from a potential in a reference section such as a synchronization signal section of said digital video data,
A recording / reproducing apparatus for measuring as noise. 20. The recording / reproducing apparatus according to claim 16, wherein said non-standardity measuring means calculates a deviation amplitude from a potential in a reference portion such as a synchronization signal portion of said digital video data,
A recording / reproducing apparatus for measuring as noise. 21. The recording / reproducing apparatus according to claim 16, wherein the non-standard degree measuring means measures a deviation period and a deviation amplitude from a potential in a reference portion such as a synchronization signal portion of the digital video data as noise. A recording / reproducing apparatus characterized by the above-mentioned. 22. The recording / reproducing apparatus according to claim 1, further comprising resolution conversion means for changing the resolution of the digital video data and outputting the digital video data, wherein the compression encoding means changes the resolution by the resolution conversion means. A recording / reproducing apparatus, which generates a bit stream by compressing and encoding digital video data. 23. An output device for compressing and encoding digital video data to generate and output a bit stream, comprising: a filter for filtering input analog video data; and A for converting the analog video data into digital video data. / D conversion means, synchronization detection means for detecting synchronization information as vertical synchronization data and horizontal synchronization data of the digital video data, and non-standardity for measuring the non-standardity indicating the state of the digital video data from the synchronization information. Standardity measuring means, compression encoding means for compressing and encoding at a compression rate according to the non-standardity, adjusting the data amount of the digital video data to generate a bit stream, and outputting the bit stream to the output device. A digital interface for outputting to an external device connected to the Output device according to claim. 24. The recording / reproducing apparatus according to claim 1, wherein a recording method of the video data,
That is, a recording / reproducing apparatus further comprising a recording method determining means for selecting and recording either the digital recording method or the analog recording method. 25. The recording / reproducing apparatus according to claim 24, wherein the recording method determining means determines that the non-standard value is larger than a preset non-standard value reference value. A recording / reproducing apparatus, wherein a recording method is switched from a digital recording method to an analog recording method. 26. The recording / reproducing apparatus according to claim 24, wherein the recording method determining means determines that the non-standard value is smaller than a preset non-standard value reference value. A recording / reproducing apparatus, wherein a recording method is switched from an analog recording method to a digital recording method. 27. The recording / reproducing apparatus according to claim 24, wherein the recording method determining means has a mode in which a user determines the recording method, and a mode in which the recording method determining means determines the recording method. A recording / reproducing apparatus characterized by the above-mentioned. 28. The recording / reproducing apparatus according to claim 24, wherein a buffer means for temporarily storing the bit stream, and the bit stream temporarily stored in the buffer means is recorded on a recording medium, or a bit recorded on the recording medium. Further comprising a recording / reproducing means for reproducing a stream, wherein when the bit stream is recorded by the recording / reproducing means, the bit stream is read from the buffer means and recorded at a rate different from the rate of the bit stream; When the bit stream is reproduced, the bit stream is reproduced and output at the rate of the bit stream without using the buffer means, or the bit stream is reproduced at the recording rate and temporarily stored in the buffer means. Playback and output at a rate of Reproducing apparatus. 29. The recording / reproducing apparatus according to claim 28, wherein the recording / reproducing means records the bit stream and rate information of the bit stream. 30. The recording / reproducing apparatus according to claim 28, wherein a recording method for recording the bit stream temporarily stored in the buffer means on the recording medium is a digital recording method. A minimum recording speed selected from recordable recording speeds according to the recording rate. 31. The recording / reproducing apparatus according to claim 30, wherein the recording method determining means has a mode in which a user determines the recording speed, and a mode in which the recording method determining means determines the recording speed. A recording / reproducing apparatus characterized by the above-mentioned. 32. The recording / reproducing apparatus according to claim 25, wherein the non-standard level or the non-standard degree is determined by an OSD, a display panel, or the like.
A recording / reproducing apparatus, further comprising display means for notifying a user that the recording method and the recording speed are switched. 33. The recording / reproducing apparatus according to claim 1, further comprising a VBI signal forming means for replacing VBI information of the digital video data and forming a synchronizing section, wherein the VBI signal forming means comprises: A signal of VBI information of video data is formed and a video signal is output. If the value of the non-standard degree increases from a reference value of the non-standard degree set in advance, a path using the VBI signal forming means is formed. A recording / reproducing apparatus, which outputs a video signal by switching. 34. The recording / reproducing apparatus according to claim 1, further comprising VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section, wherein the VBI signal forming means comprises: Forming a signal of VBI information of the video data and outputting a video signal; if the value of the non-standard degree is smaller than a preset reference value of the non-standard degree, a path not using the VBI signal forming means; A recording / reproducing apparatus, wherein the recording / reproducing apparatus outputs a video signal by switching to a video signal. 35. The output device according to claim 23, further comprising VBI signal forming means for replacing VBI information of the digital video signal and forming a synchronizing section, wherein the VBI signal forming means is a digital video signal. A signal of VBI information of data is formed to output a video signal, and a video signal is switched between a path using the VBI signal forming means and a path not using the VBI signal forming means according to the value of the non-standard degree. And an output device. 36. The recording / reproducing apparatus according to claim 1, wherein the non-standardity and the OS of the digital video data are
OSD method determining means for determining a method of synthesizing the ODS information with the video signal based on the D occupation ratio. OS that corrects synchronization by means and combines and outputs OSD information
D method A and OSD method B for synthesizing OSD information without re-forming the VBI information and the synchronizing unit. The OSD method determining means performs the OSD method based on the non-standardity and the OSD occupancy. A recording / reproducing apparatus comprising: selecting one of the system A and the OSD system B; and combining the video signal with OSD information and outputting the synthesized signal. 37. The recording / reproducing apparatus according to claim 36, wherein the OSD method determining means, when synthesizing the video signal and the reproduction signal with OSD information and outputting the synthesized signal, outputs the non-standard value and the OSD information. A recording / reproducing apparatus characterized in that when the occupancy increases from a preset reference value, the video signal is combined with OSD information using the OSD method A and output. 38. The recording / reproducing apparatus according to claim 36, wherein when the OSD method determining means combines the output signal with OSD information and outputs the synthesized signal, the value of the non-standard degree is set to a predetermined reference value. And the OSD occupancy is increased
A recording / reproducing apparatus characterized in that if the value of the video signal falls below a preset reference value, the video signal is combined with OSD information using the OSD method B and output. 39. The recording / reproducing apparatus according to claim 36, wherein when the OSD information is combined with the output signal and the OSD information is output, the non-standard value is set to a predetermined reference value. If the number is further reduced, the video signal is combined with OSD information using the OSD method A or the OSD method B, and the combined signal is output. 40. The output device according to claim 23, wherein the non-standardity and OSD of the digital video data are set.
OSD method determining means for determining an OSD method for synthesizing ODS information with the video signal based on the occupancy is further provided. The VBI signal forming means performs replacement of VBI information of the digital video signal and formation of a synchronization unit. OSD method A for synchronizing, synthesizing OSD information and outputting the same,
An OSD method B for synthesizing the OSD information without re-forming the BI information and the synchronizing unit; and the OSD method determining means uses the OSD method A and the OSD method based on the nonstandardity and the OSD occupancy. B. selecting any one of B and combining the video signal with OSD information and outputting the resultant signal.