JP2001014793A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the device from recording pirating copyright and also to let the device easily recognize the video signal as recording-disabled when the magnetic recording and reproducing device detects copyright information at the time of recording it on a recording medium. SOLUTION: The magnetic recording and reproducing device is arranged so that it is provided with a de-shuffling control means 5 operating at the time of recording on a recording medium; it operates recording without operating the de-shuffling means 4 of a recorded video signal when the device discriminates it as recording-disabled due to copyright; at the time of reproducing operation, it is possible to discriminate from a picture outputted on a monitor 10 more clearly that the video signal is recording-disabled; and thus, an effect of preventing copyright piratical recording can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus provided with a recording means for an external input signal using a deshuffling processing means when it is determined by a copyright information that the external input signal cannot be recorded on a recording medium. It concerns the device.

[0002]

2. Description of the Related Art In recent years, digital recording accompanied by high-density recording has been advanced from analog recording to magnetic recording / reproducing devices. For digital video tape recorders for consumer use, the HD Digital VCR Council has been established as a standard, and compatibility among various companies has been established as basic specifications. Has been established. Against this background, unlike conventional analog magnetic recording / reproducing devices, digital recording on a recording medium allows video,
One of the features of the digital magnetic recording / reproducing apparatus is that the deterioration of image quality and sound quality of both voices is very small.
Therefore, copyright information is added to video and audio signals for the purpose of eliminating records infringing the copyright of the video and audio. Even in a digital magnetic recording / reproducing apparatus, it is necessary to identify the copyright information at the time of recording, and then perform a recording operation and a recording restriction according to the content.

FIG. 5 is a block diagram showing the configuration of a conventional digital magnetic recording / reproducing apparatus.
Reference numeral 2 denotes a recording medium on which digital signals can be recorded and reproduced. In this configuration, a magnetic tape was used. Reference numeral 51 denotes a recording medium drive control unit for performing a recording / reproducing operation on the recording medium 52; 57, an external signal input circuit unit for inputting an external input signal to be recorded on the recording medium 52; Is input. Reference numeral 56 denotes a video signal processing unit for performing video signal processing such as compression, decompression, error correction, and shuffling in accordance with a recording / reproducing operation; 58, a video signal output circuit unit for outputting reproduced / recorded video to a monitor 59; 5
A recording / reproducing signal processing unit 54 for reproducing the video signal recorded in the recording medium 2 and recording the video signal on the recording medium, and performs deshuffling on the signal input from the recording / reproducing signal processing unit 53 when reproducing the recording medium 52 to produce a video. The signal is output to the signal processing unit 56, and at the time of recording, the signal input from the video signal processing unit 56 is deshuffled to perform the recording / reproducing signal processing unit 53.
The reference numeral 55 denotes a copyright information detecting unit which is signal information detecting means for detecting various signal information such as copyright information of an external input signal input at the time of recording.

The recording operation of the conventional digital magnetic recording / reproducing apparatus configured as described above will be described below.

[0005] First, an external input signal is input from an external signal input circuit section 57 and output to a video signal processing section 56. The video signal processing unit 56 performs band compression processing if the external input signal is an analog signal, maintains the compressed signal if the external input signal is a digital signal, and performs signal processing according to the input external input signal. And outputs to the deshuffling processing unit 54 as a digital signal. Deshuffling processing unit 54
Then, the input digital signal is subjected to deshuffling, output to the recording / reproduction signal processing unit 53, and recorded on the recording medium by the recording / reproduction signal processing unit 53.

In the video signal processing section 56, when the external input signal input from the external signal input circuit section 57 is an analog signal, it is output to the video signal output circuit section 58 as it is, and the video signal output circuit section 58 Is output to the monitor 59 and displayed. Further, when the external input signal input from the external signal input circuit section 57 is a digital signal, the video signal processing section 56 performs processing such as expansion of the compressed signal and error correction, and then converts the signal into an analog signal. The signal is output to the video signal output circuit unit 58 and output to the monitor 59 for display.

During the series of recording operations, the copyright information detecting unit 55 extracts the copyright information of the external input signal from the video signal processing unit 56 and identifies the contents. The content of the identification result is determined as “recordable” or “recordable”, but when it is determined as “recordable”, the recording medium drive controller 51 causes the recording medium 52 to stop running on the recording medium. ,
Control is performed to stop the recording operation on the recording medium 52.
Alternatively, the signal output from the recording / reproducing signal processing unit 53 to the recording medium 52 is stopped, and the external input signal is
Do not record in.

[0008] Further, if the copyright information of the external input signal has already been extracted before the start of the recording operation, and the contents that cannot be recorded have been identified, the operation is not shifted to the recording operation.

[0009]

However, in the above-mentioned conventional configuration, the recording medium drive control section 51 stops running of the recording medium 52 when the copyright information detecting section 55 extracts the copyright information and identifies the contents. Such an operation has a problem that, when the recording medium 52 is reproduced later, since the video and audio signals are not recorded, it is not possible for the user to recognize the cause of the failure in recording. .
That is, there is a problem that the recording medium drive control unit 51 or the like is recognized as a failure.

The present invention solves the above-mentioned conventional problem. When the result of copyright information detection cannot be recorded, an externally input video signal is recorded on a recording medium with the deshuffling process of the video signal stopped. Accordingly, it is an object of the present invention to provide a magnetic recording / reproducing apparatus that visually indicates that non-recordable copyright information has been added to an external input signal during reproduction and suppresses recording that violates copyright.

[0011]

In order to achieve this object, a magnetic recording / reproducing apparatus having a recording / reproducing function according to the present invention comprises:
Recording medium driving means for driving and controlling the recording medium and recording the input video / audio signal on the recording medium; external signal input means for inputting an external video signal; and various types of video signals input by the external signal input means. Video signal processing means for performing signal processing, deshuffling processing means for deshuffling the video signal processed by the video signal processing means, and detecting signal information relating to the input video signal to enable recording of the signal on the recording medium or Signal information detecting means for determining whether recording is impossible, and deshuffling control means for controlling the deshuffling processing means and the recording medium driving means based on the detection result of the signal information detecting means, wherein the signal information detecting means is inputted When it is determined that the signal cannot be recorded, the deshuffling control means controls the deshuffling control means. And controls the processing means is for controlling to record an external input video signal on the recording medium in a state of stopping the deshuffling process of the video signal.

According to this configuration, when the result of the detection by the copyright information detecting unit is not recordable, the external input video signal is recorded on the recording medium in a state where the deshuffling process of the video signal is stopped, and cannot be copied to the external input signal during reproduction. The effect of visually indicating that the copyright information has been added and suppressing the record that infringed the copyright can be obtained.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a recording medium driving means for driving and controlling a recording medium to record an input video / audio signal on the recording medium, and inputting an external video signal. External signal input means, video signal processing means for performing various signal processing of the video signal input by the external signal input means, deshuffling processing means for deshuffling the video signal processed by the video signal processing means, Signal information detecting means for detecting signal information relating to a video signal to be recorded and determining whether or not recording of the signal on the recording medium is possible, and the deshuffling processing means and the recording medium driving means based on the detection result of the signal information detecting means. Deshuffling control means for controlling, and the signal information detecting means determines that the input signal is not recordable. At the time, the deshuffling control means controls the deshuffling processing means and controls to record the external input video signal on the recording medium in a state in which the deshuffling processing of the video signal is stopped. When recording the external input signal, the copyright information is detected by the copyright information detecting means, and if the result of the detection is not recordable, the external signal is output to the recording medium in a state where the deshuffling processing of the video signal is stopped by the deshuffling control means. By recording, it is possible to visually clearly indicate that copyright information that cannot be copied is added to the external input signal at the time of reproduction, and to suppress recording that infringes copyright.

According to a second aspect of the present invention, there is provided a recording medium driving means for driving and controlling a recording medium and recording an input video / audio signal on the recording medium, and an external signal input means for inputting an external video signal. Video signal processing means for performing various signal processing of a video signal input by the external signal input means, deshuffling processing means for deshuffling the video signal processed by the video signal processing means, and a signal related to the input video signal Signal information detecting means for detecting information, and deshuffling control means for controlling the deshuffling processing means and the recording medium driving means based on the detection result of the signal information detecting means, wherein the signal information detecting means receives an input signal. When it is determined that recording is not possible, the deshuffling control means deshuffles the video signal. After recording the external input video signal on the recording medium with the recording process stopped for a certain period of time, the recording operation in the recording medium driving unit is controlled to be stopped. Copyright information is detected by the copyright information detecting means during recording,
If the detection result indicates that recording is not possible, the deshuffling control means stops the deshuffling processing of the video signal and records the external input video signal on the recording medium, so that copyright information that cannot be copied is added to the external input signal during playback It has the effect of visually indicating what was done and suppressing records that infringed copyright.

An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of a magnetic recording / reproducing apparatus according to the present invention. In FIG. 1, reference numeral 2 denotes a recording medium capable of recording and reproducing digital signals, which corresponds to a magnetic tape or an optical disk. I do. Reference numeral 1 denotes a recording medium drive control unit which is recording medium drive control means for driving the recording medium 2 to perform a recording / reproducing operation of a video / audio signal, and 8 denotes an external signal input for inputting an external input signal to be recorded on the recording medium 2. An external signal input circuit section 7 as a means, a video signal processing section as a video signal processing means for performing video signal processing such as compression, decompression, error correction, and shuffling in accordance with a recording / reproducing operation;
Reference numeral 9 denotes a video signal output circuit which is a video signal output means for outputting a reproduced / recorded video to the monitor 10; and 3, a recording / reproducing signal processing means for reproducing the video signal recorded on the recording medium 2 and recording the video signal on the recording medium. A recording / reproducing signal processing unit,
De-shuffles the signal input from the recording / reproducing signal processing unit 3 during reproduction and outputs the signal to the video signal processing unit 7, and performs de-shuffling on the signal input from the video signal processing unit 7 during recording to perform the recording / reproducing signal processing A deshuffling processing unit which is a deshuffling means for outputting to 3
Reference numeral 5 denotes a deshuffling control unit which is a deshuffling control unit for controlling the operation or stop of the deshuffling processing operation for the deshuffling processing unit 4 at the time of recording and reproduction, and for controlling the driving operation for the magnetic tape drive control unit 1. It is a copyright signal detection unit which is signal information detection means for detecting various information such as copyright information of an input external input signal.

Here, the copyright information detected by the copyright signal detector 6 will be briefly described. Copyright information included in an external input signal, that is, a video signal recorded on a recording medium is roughly classified into two types, an analog video signal and a digital video signal. Macrovision signals (AGC-Pulse, Colorstripe), V
B-ID (Vertical Blanking-ID), WSS (Wide Screen Sig
lingling) and CGMS-A (Copy Generation Manag
ement System-Analog). In digital video signals, CGMS-D (Copy Generation Management System-Digita
l) is effective for a device having digital signal input means, and is included in the system data group as generation management information of the recording operation. In order to identify such copyright information, each device needs the signal and data identification means.

The recording operation of the digital magnetic recording / reproducing apparatus of the present embodiment configured as described above will be described with reference to the flowchart shown in FIG.

First, an external video signal to be recorded on the recording medium 2 is input from the external signal input circuit 8 in step 20 in FIG. The external video signal corresponds to a tuner input video of an analog broadcast or a video signal input from an analog external input terminal or the like in an analog signal. Also, in the case of a digital signal, a tuner input video of a digital broadcast or video data input through a digital interface corresponds to the digital signal. One example is a transmission method using IEEE 1394 isochronous communication.

Next, in step 21, step 20
The video signal processing unit 7 performs video signal processing on the external video signal input in step (1). If the input signal is an analog signal, it is output to the monitor 10 through the video signal output circuit unit 9 in step 23 to output a video to be recorded. Further, copyright information is extracted from the input analog signal and band compression processing is performed to convert an external video signal to be recorded into a digital signal.

If the input signal is a digital signal, the compressed signal is subjected to processing such as expansion and error correction, and then copyright information is extracted and converted into an analog signal. The image is output to the monitor 10 through the output circuit unit 9 to output a video to be recorded. The external video signal to be recorded is held in a state of a compressed digital signal.

Next, the copyright information extracted in step 21 is identified by the copyright information detecting section 6 in step 22. As a result of the identification, when the external video signal is “recordable”, that is, when copy recording is possible, or when the copyright information itself is not added, the deshuffling process is performed by the deshuffling processing unit 4 under the control of the deshuffling control unit 5. Control to do. If the external video signal is “recording disabled”, that is, copy recording is prohibited, the deshuffling control unit 5 controls the external video signal so that the deshuffling processing unit 4 does not perform the deshuffling process.

Here, the shuffling and deshuffling processing of the digital video will be briefly described based on the standard based on the unified digital video tape recorder standard "Digital VCR for Consumer-Use" established by the HD Digital VCR Council. In the process of compressing a video signal, first, a process called shuffling is performed. The purpose of this shuffling process is to collect a group of scattered pixel data called macroblocks into one processing unit, and record them on a recording medium. To make it more conspicuous, the data amount of the compression processing unit block is averaged. In the 525/60 system, one frame screen is vertically divided into ten equal parts, and then divided horizontally into five equal parts in order to make a fixed length in units of five macroblocks in band compression. In order to eliminate the bias of the amount of image information in one frame for these data, five macroblocks are collected from distant portions and band-compressed. However, even if only the shuffling process is executed and recorded on the recording medium, block distortion occurs at the time of variable speed reproduction such as fast forward reproduction and rewind reproduction. Therefore, in consideration of these variable-speed reproductions, in order to obtain a reproduction image as close as possible to the original image at the time of 1 × speed reproduction, each one frame screen is vertically divided into ten equal parts, and the original image information is recorded on ten tracks. Rearrange blocks. That is, the data processing for arranging the data on the track so that the data can be obtained along the flow of the original image at the time of the variable speed reproduction is the deshuffling processing. In the present embodiment, the video signal processing unit 7 in step 21
The shuffling process of the external video signal to be recorded is performed, and the deshuffling process is performed by the deshuffling processing unit 4. If the external video signal is a digital signal, the video signal processing unit 7 does not perform the shuffling process because it has already been compressed.

Next, in step 25 or step 26, the recording video signal output from the deshuffling processing unit 4 which has been processed up to shuffling or deshuffling is subjected to recording signal processing in the recording / reproducing signal processing unit 3 in step 27. The recording is performed on the recording medium 2 in step 28.

A reproducing operation of a digital magnetic recording / reproducing apparatus for reproducing the recording medium 2 recorded by the above series of operations will be described below with reference to a flowchart shown in FIG.

First, a reproducing operation of the recording medium 2 is executed in step 30 of FIG. 3, and a reproducing signal of the recording medium 2 is inputted in step 31. Further, the recording / reproducing signal processing unit 3 performs a reproducing signal process, and outputs the reproduced signal to the deshuffling process in step 32. Next, the deshuffling processing by the deshuffling processing unit 4 at the time of reproduction in step 32 is performed in the above-described step 25 or step 26 during the recording operation.
Is performed irrespective of whether or not the deshuffling process is performed in the above, even if the recording is not performed the deshuffling process in step 25 in the recording operation, the deshuffling process is performed during reproduction. Then, after performing processing such as expansion and error correction of the reproduced signal compressed by the video signal processing unit 7 in the video signal processing in Step 33, the video signal is output to the monitor 10 through the video signal output circuit unit 9 in Step 34. Display the played video.

However, the output image on the recording medium which is "recording disabled" due to the copyright information during the recording operation, that is, copy recording is prohibited, and the input video signal is not subjected to the deshuffling process in step 25 described above. Done 1
In this state, the sync blocks in the frame unit are rearranged, and a normal output video of the recorded original image cannot be obtained.

The output video is in the form of block noise in which data on one frame is scattered over the entire screen, and the original image cannot be visually identified, but it can be recognized that a moving image is recorded.

As described above, according to the present embodiment, although the external video signal is recorded on the recording medium, it can be clearly determined from the copyright information that the reproduced image is not normal. At the same time, an effect of preventing a record infringing copyright can be obtained.

(Embodiment 2) Hereinafter, the configuration of Embodiment 2 of the present invention will be described. Since the configuration is the same as that of the first embodiment, detailed description of the configuration is omitted.

FIG. 4 is a flowchart showing the operation of this embodiment. This embodiment is different from the above-described first embodiment in that the input video signal to be recorded is “recording disabled”, that is, when copy recording is prohibited, the recording is performed without performing the deshuffling process for a certain period of time. Is to stop the recording operation.

Hereinafter, the magnetic recording / reproducing apparatus of this embodiment will be described in detail with reference to FIG.

The copyright information detected by the copyright information detecting section 6 is identified in step 42. As a result of the identification, if the external video signal is “recording disabled”, that is, copy recording is prohibited, the deshuffling process is not performed on the external video signal under the control of the deshuffling control unit 5. During this time, the time during which the deshuffling process is stopped and the recording is performed is counted by a timer at step 36. This timer counts the number of frames T recorded while the deshuffling process is stopped.
The condition for resetting T is when the tape recording operation is stopped. This timer may be a recording time instead of the number of frames.

If the external video signal is “recordable”, that is, copy-recordable, or if the copyright information itself is not added, the deshuffling control unit 6
Is controlled by the deshuffling processor 4 in step 47
Is performed.

Next, the recording video signal output from the deshuffling processing unit 4 and subjected to the processing up to the shuffling or the deshuffling is subjected to recording signal processing in the recording / reproducing signal processing unit in step 48, and the process proceeds to step 49.
In step 49, the value of the number of frames T is monitored, and if the value of T is equal to or more than a predetermined value, the process proceeds to step 410, in which the deshuffling control unit 5 controls the recording medium drive control unit 1 to forcibly transfer to the recording medium 2. The recording operation of is stopped. If the value of T is less than a certain value, the recording video signal obtained in step 48 is recorded on a recording medium. Note that once the deshuffling process is stopped and recording is started, the stop of the deshuffling process is not released until the value of T exceeds a certain value.

As described above, according to the present embodiment, even when copyright information that cannot be recorded is detected and the recording operation is stopped, the deshuffling process is stopped for a certain period of time before the recording is stopped. By performing the recording, it is possible to clearly determine from the reproduced image that the recording has been stopped by the copyright information during reproduction.

[0037]

As described above, according to the present invention, when it is detected that recording is impossible due to copyright information during recording on a recording medium, recording is performed in a state where the deshuffling process of the recording video signal is stopped, and external input that cannot be recorded during reproduction is performed. It is possible to clearly determine that the signal is a signal, and it is possible to obtain an excellent effect that an effect of preventing recording that infringes copyright is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a magnetic recording and reproducing device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the magnetic recording and reproducing apparatus according to the first embodiment;

FIG. 3 is a flowchart for explaining the operation of the magnetic recording and reproducing apparatus according to the first embodiment;

FIG. 4 is a flowchart for explaining the operation of the magnetic recording and reproducing apparatus according to the second embodiment;

FIG. 5 is a block diagram showing a configuration of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording medium drive control part 2 Recording medium 3 Recording / reproduction signal processing part 4 Deshuffling processing part 5 Deshuffling control part 6 Copyright information detection part 7 Video signal processing part 8 External signal input circuit part 9 Video signal output circuit part 10 Monitor

Continuation of the front page (72) Inventor Satoshi Isoe 1-1-1, Matsushita-cho, Ibaraki-shi, Osaka Matsushita Avicy Technology Co., Ltd. F-term (reference) 5C053 FA21 GB06 GB18 JA01 JA30 KA24 KA26 LA06 5D044 AB05 AB07 BC01 CC01 DE50 GK12 GK17 HL08

Claims (2)

[Claims] 1. A recording medium driving means for driving and controlling a recording medium and recording an input video / audio signal on the recording medium, an external signal input means for inputting a video signal from outside, and an input signal from the external signal input means. Video signal processing means for performing various kinds of signal processing of the video signal, a deshuffling processing means for deshuffling the video signal processed by the video signal processing means, and detecting signal information related to the input video signal to the recording medium. Signal information detecting means for determining whether recording of a signal is possible or not, and deshuffling control means for controlling the deshuffling processing means and the recording medium driving means based on a detection result of the signal information detecting means; However, when it is determined that the input signal is not recordable, the deshuffling control means A magnetic recording / reproducing apparatus which controls an external input video signal to be recorded on the recording medium in a state where the deshuffling processing means is controlled to stop the deshuffling processing of the video signal. 2. A recording medium driving means for driving and controlling a recording medium and recording an input video / audio signal on the recording medium, an external signal input means for inputting a video signal from outside, and an input signal from the external signal input means. Video signal processing means for performing various signal processing of the video signal, deshuffling processing means for deshuffling the video signal processed by the video signal processing means, signal information detection means for detecting signal information about the input video signal, Comprising a deshuffling processing unit and a deshuffling control unit for controlling the recording medium driving unit based on a detection result of the signal information detection unit, wherein the signal information detection unit determines that an input signal cannot be recorded. Is a state in which the deshuffling control means stops the deshuffling process of the video signal for a certain period of time. A magnetic recording / reproducing apparatus, wherein after recording an external input video signal on a recording medium in a state, the recording operation of the recording medium driving means is controlled to be stopped.