JPH1153785A - Tv signal recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely fast forward a commercial part at a reproducing time by superimposing/recording information accompanied with identification numbers of a device and a tape and an absolute address of a tape present position on a vertical blanking interval and recording them in a memory at a recording time. SOLUTION: At a video recording time, a commercial decision circuit 4 decides the time when a soundless part and a luminance change part are detected by an audio soundless detection circuit 2 and a video luminance change detection circuit 3 as the start point and end point of the commercial, and stored them in a memory 20 while being accompanied with absolute addresses of present positions from the wind-start of the magnetic tape 32. At a reproducing time, the circuit 4 reads out video recording contents information answering to the identification numbers of the device and the tape read out by preliminary reproduction from the memory 20, and recognizes the absolute addresses of the start point and the end point of the commercial, and collates them with the absolute addresses of the present positions read out from the magnetic tape 32 to control the traveling of the magnetic tape 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application of a television signal recording / reproducing apparatus. In particular, the information of the recorded contents of the magnetic tape in which the program information of the video and audio signals received by the TV tuner is superimposed and recorded on the video signal is read out from the memory and displayed in a list, and the commercial part is fast-forwarded by using the list display. Regarding search playback.

[0002]

[Prior art]

Conventionally, 1) Japanese Patent Application Laid-Open No. 1-292606 discloses that a video and an audio recorded by a magnetic recording and reproducing apparatus can be selectively reproduced.
An identification signal designating means for designating an identification signal to be reproduced in a magnetic reproducing apparatus for reproducing a tape recorded on a control track by converting a control signal of an audio multiplex signal as an identification signal corresponding to a video signal; A video signal reproducing means for reproducing a video signal corresponding to the identification signal portion is disclosed.

2) In the recording / reproducing apparatus described in JP-A-2-81344, the timing of switching the screen during recording or reproduction is detected, and the time until the next screen switching is measured by a timer. The system includes means for detecting a screen change for judging whether or not a commercial, means for measuring a time until the screen is changed, and means for judging a commercial.

[0004]

The above prior art 1) is as follows.
When fast-forwarding a commercial in a program, the fast-forwarding of the commercial video part is started by automatically detecting the identification signal recorded on the control track during playback.
Similarly, detecting the identification signal recorded on the control track stops the fast forward of the commercial video part and returns to normal playback, but running the magnetic tape at high speed to detect the identification signal recorded on the control track It takes time because it cannot be done.

In the prior art 2), the timing of screen switching is detected, the time until the next screen switching is measured by a timer, and it is determined whether or not a commercial has been reached. After recording, it was necessary to rewind the magnetic tape and record an identification signal as to whether it was a commercial or not on the control track.

[0006]

To achieve the above object, a television signal recording and reproducing apparatus according to the present invention comprises:
Means for judging that the received signal is a commercial, means for associating the commercial with an identification number unique to the apparatus, an identification number unique to the magnetic tape, and the absolute address of the current position from the start of winding of the magnetic tape; A means for recording and decoding the video signal by superimposing the information on the vertical blanking period of the video signal and a memory means for storing the information simultaneously with the recording are provided to compare the absolute address of the commercial with the absolute address of the memory. To fast-forward the commercial portion of the magnetic tape.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing a circuit configuration of a main part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, 1 is a time counting circuit, 2 is a no-sound signal detecting circuit, 3 is a video luminance change detecting circuit, 4 is a commercial judging circuit, 5 is a video signal input switching control circuit,
6 is a date / time signal generating circuit, 7 is an absolute address signal generating circuit, 8 is a TV tuner, 9/14/15 is a video signal switching circuit, 10 is an information signal recording processing circuit, 11 is an information signal multiplexing processing circuit, 12 Is a video signal recording / playback processing circuit, 1
3 is a character signal adding circuit, 16 is a character signal generating circuit, 17
Is a video signal presence / absence detection circuit, 18 is a blue-back generation circuit, 19 is an information signal reproduction processing circuit, 20 is a memory,
1 is a control signal recording processing circuit, 22 is a control signal reproduction processing circuit, 23 is a control signal switching circuit, 24 is a system control circuit, 25 is an operation unit,
26 is a display unit, 27 is a reel rotation number detection circuit, 28 is a tape insertion detection circuit, 29 is a control head, 30,
31 is a video head, 32 is a magnetic tape, 33 is a take-up reel, 34 is a supply reel, 35 is an erroneous erasure prevention mode detection circuit, 36 is a TV signal input, 37 is a line video signal input, and 38 is a line video signal output. Be composed.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, when the user gives an instruction to turn on the power using the operation unit 25, the system control circuit 24 turns on the power of the present television signal recording / reproducing apparatus (hereinafter, referred to as VTR). When the magnetic tape 32 is inserted by the user, the tape insertion detecting circuit 28 detects it, and in response, the system control circuit 24 performs preliminary reproduction and information detection.

Next, the preliminary reproduction process will be described. The signals reproduced by the magnetic heads 30 and 31 from the magnetic tape 32 after the preliminary reproduction processing is started are subjected to reproduction processing by the video signal recording / reproduction processing circuit 12, and information signals are extracted by the information signal reproduction processing circuit 19, and system control is performed. Output to the circuit 24. The system control circuit 24 reads the reproduced information signal from the information signal reproduction processing circuit 19. At the same time, the system control circuit 2
4 controls the video signal switching circuit 14 and outputs the video signal from the TV tuner 8 to the line video signal output 38 via the character signal addition circuit 13. Therefore, the video signal reproduced by the preliminary reproduction process is output to the line video signal output 38.
Is not output to Since the purpose of the preliminary reproduction operation is to read the information signal, it is not necessary to output a reproduced video signal, thereby preventing the user from seeing unnecessary video. The system control circuit 24 reads the identification number unique to the apparatus, the identification number unique to the magnetic tape, and the absolute address of the magnetic tape from the reproduced video signal, and compares them. The absolute address is set in the absolute address signal generation circuit 7. After performing the preliminary reproduction operation for a predetermined time, the system control circuit 24 automatically stops the tape running. If the comparison result shows that the reproduced video signal does not match the identification number unique to the apparatus, the identification number unique to the magnetic tape, and that stored in the memory 20, the magnetic tape is automatically rewound to the beginning and the tape running is stopped. . As a result of the preliminary reproduction operation, the video signal presence / absence detection circuit 17 detects whether or not the video signal is being reproduced, and outputs the result to the system control circuit 24. If there is no video signal, the magnetic tape is automatically rewound to the beginning and the reproduction and the detection of the information signal are performed again. If the information signal is still not detected and if there is a video signal, the system control circuit 24 detects whether or not the magnetic tape is protected from erroneous erasure by the output of the erroneous erasure prevention mode detection circuit 35. For a magnetic tape that is not protected from accidental erasure, the smallest number that does not yet use the magnetic tape's unique identification number is assigned. A magnetic tape which is prevented from being accidentally erased automatically starts a reproducing operation.

Next, the display of the recorded contents of the magnetic tape will be described. As a result of the preliminary reproduction, the reproduced information signal is compared with the information signal stored in the memory 20. If the identification number unique to the apparatus and the tape identification number match, the operation unit 25 instructs the list display. Is performed, the system control circuit 24 reads out the recorded content information from the memory 20 and displays the list. The list display is performed on the video signal from the blue-back generation circuit 18 or the TV tuner 8 by the character signal generation circuit 16 by superimposing or by the display unit 26. When the recorded contents of the entire magnetic tape 32 are displayed, the user can designate the start of the program to be watched by using the operation unit 25 while watching the recorded contents. Similarly, the commercial portion can be specified for fast forward. When there is no list display instruction and no cueing instruction by the operation unit 25, the operation unit 25 waits for an instruction.

Next, the cueing operation and the fast-forward operation of the commercial part will be described. When a desired recording start / end unit is designated by the operation unit 25, the system control circuit 24 reads the recording start / end unit data from the memory 20 and sets an absolute address of a target. At the same time, the movement time is calculated from the difference between the target absolute address read from the memory 20 and the current absolute address of the magnetic tape 32.
Moving time and C calculated during start / end unit search of recording
The moving time calculated by counting the TL signal is compared, and if they match, the current absolute address of the magnetic tape 32 is read and the absolute address is compared with the target absolute address. Let it. Similarly, in the commercial part, the search for the fast-forward operation can be quickly and accurately completed similarly to the above-described search for the start / end unit of recording by attaching the absolute address to the start point and the end point.

Next, recording will be described. When a recording instruction is input from the operation unit 25 by the user, the system control circuit 24 performs a recording process. Information such as the identification number unique to the apparatus, the identification number unique to the magnetic tape, the absolute address of the current position from the start of winding the magnetic tape, the date and time at the start of recording, the day of the week, the channel, and whether or not commercial has been allocated above. It is automatically stored in the memory 20. The counting of the absolute addresses is started by the absolute address signal generating circuit 7 at the same time when the running of the magnetic tape 32 for recording is started. The system control circuit 24 controls the control signal recording processing circuit 21 and records a cue signal on the magnetic tape 32 by the control head.
During the recording, the identification number unique to the device, the identification number unique to the magnetic tape, the absolute address of the current position from the start of the magnetic tape, the date and time at the start of recording, the day of the week, the channel, and whether or not a commercial is multiplexed. The video signal is transferred to a magnetic tape 32
To record. The video signal and the audio signal from the TV tuner 8 are obtained by detecting a video luminance change by the video luminance change detection circuit 3 to detect an audio non-signal by the audio non-signal detection circuit 2, and determining a signal switching point and a time between the switching points. Is compared with the time preset in the time counting circuit 1 and is judged to be a commercial, and the absolute address of the current position from the beginning of the winding of the magnetic tape 32 is stored in the memory 20 along with it. When an instruction to end recording is input from the operation unit 25, the system control circuit 24 stops the running of the magnetic tape 32 and at the same time stops counting the absolute addresses by the absolute address signal generation circuit 7. The time from the start to the end of the recording and the remaining time of the tape are stored in the memory 20 and the recording ends.

Next, a method for determining a commercial will be described with reference to FIG. FIG. 3 is a flowchart of a commercial judging method. As means for judging the commercial, the change of the luminance signal of the received video signal is detected by the video luminance change detection circuit 3 and the non-voice of the audio signal is detected by the audio non-signal detection circuit 2 to determine the commercial switching point. The time until the next switching point is measured, and the time that matches the time set in the time counting circuit 1 is determined as a commercial. Since it is after the commercial is broadcasted that the time to the next switching point is measured as the commercial switching point, the magnetic tape 3 at the commercial switching point is set as the commercial switching point.
The absolute address 2 is stored in the memory 20.

Referring to FIG. 4, a method for displaying and retrieving the recorded contents of the magnetic tape 32 will be described. FIG. 4 is an example in which the recorded contents of the entire magnetic tape 32 are displayed in a list. Performs a pre-reproduction operation and sets the system control circuit 2
Reference numeral 4 reads the information of the recorded contents from the memory 20 and displays a list of the recorded contents in the same manner as described above. The user can specify a program to be viewed while viewing the screen by using the operation unit 25, and automatically searches for the start / end unit and starts reproduction. On the screen, the symbol 39 of the CM section indicates that a commercial is present and is recorded as it is, and the user can designate the commercial fast-forward by the operation section 25 while reproducing the start / end unit.

A method of displaying a recording / end unit including a commercial will be described with reference to FIG. FIG. 4 is an example in which the recorded contents of the entire magnetic tape 32 are displayed in a list.
The system control circuit 24 determines that the case where the content determined to be the commercial is included in the recording / end unit is a specific symbol 39, determines that the commercial is only based on the change in the audio multiplex mode, automatically removes the commercial, and the user. Is a case where the commercial is manually removed with the pause button of the operation unit 25 while watching the video portion.
0 is displayed, and the fact that the commercial is removed is added to the list display and stored in the memory 20 at the same time.

Next, the identification symbol of the user will be described.
In general households, one VTR is used by several families. Also, one magnetic tape 32 is used by several families. When a single magnetic tape 32 is recorded, it is displayed together with the user's identification symbols 43, 44, 45 as shown in FIG.
The information is stored in the memory 20 as information. Magnetic tape 32
, User identification symbols 43, 44,
45 allows the user to easily select and search / reproduce the recording / ending unit. When recording or timer recording is instructed by the operation unit 25, a list of identification symbols of the users of the magnetic tape 32 is displayed. From the display, the user can determine whether the inserted magnetic tape 32 can be used. Then, by selecting an identification symbol from the displayed list of user identification symbols and starting recording or timer recording, the user identification symbol can be easily added to the recording / ending unit.

Next, the interruption of the reproduction will be described. Recording /
When the reproduction is interrupted halfway in the end unit, the absolute address of the interrupted magnetic tape 32 is stored in the memory 20 as information together with the reproduction interruption symbol 42 in FIG. After other operations, select the recording / end unit from the list again,
The reproduction can be started from the absolute address where the reproduction of the magnetic tape 32 has been interrupted in the same manner as the above-described cueing operation.

[0019]

As described above, according to the first aspect of the present invention,
According to the above, by processing the program search and playback start point and the commercial start and end points with the absolute address of the tape, the target address read from the memory is compared with the current absolute address of the tape. According to the moving time of the difference, the program search and the fast forward of the commercial portion can be accurately performed at high speed.

According to the second aspect of the present invention, the luminance change of the video signal and the non-voice portion of the audio signal are determined as the start point and the end point of the commercial, and the time from the start point to the end point is measured. Thus, a video portion that conforms to the setting conditions can be determined more accurately as a commercial.

According to the third aspect of the present invention, whether or not a commercial is fast-forwarded during reproduction is clearly displayed by displaying whether or not a commercial is included in the start / end unit of recording. A specific symbol clearly indicates whether the recording is a start / end unit of a recording from which commercials have been removed.

Further, according to claim 4 of the present invention, one V
When the TR is shared by a large number of people, the user's symbol should be displayed when the user records by inputting the user's symbol, and when the user records, the user does not have to remove the magnetic tape. Thus, the user of the magnetic tape becomes clear, and when reproducing the magnetic tape shared by many people, the symbol of the user is displayed to make it clear to the user who recorded the start / end unit.

According to the fifth aspect of the present invention, when the reproduction is interrupted in the recording / end unit, the reproduction is interrupted by storing the absolute address of the interrupted magnetic tape in the memory 20 in association with the interruption. It is possible to accurately and quickly start reproduction from the absolute address of the magnetic tape.

[Brief description of the drawings]

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

FIG. 2 is a flowchart of the operation in the present invention.

FIG. 3 is a flowchart of a commercial determination according to the present invention.

FIG. 4 is a diagram showing a list of recorded contents of a magnetic tape in the present invention.

[Description of Signs] 1 ... Time counting circuit, 2 ... No sound signal detection circuit, 3 ... Video luminance change detection circuit, 4 ... Commercial judgment circuit, 5 ... Video signal input switching control circuit, 6 ... Date and time signal generation circuit , 7: time code signal generation circuit, 8: TV tuner, 9, 14, 15 ... video signal switching circuit, 10 ... information signal recording processing circuit, 11 ... information signal multiplex processing circuit, 12 ...
Video signal recording and reproduction processing circuit, 13 ... Character signal addition circuit, 16 ... Character signal generation circuit, 17 ... Video signal recording and reproduction processing circuit, 18 ... Blue back generation circuit, 19 ... Information signal reproduction processing circuit, 20 ... Memory , 21: control signal recording processing circuit, 22: control signal reproduction processing circuit, 23: control signal switching circuit, 24: system control circuit, 25: operation unit, 26: display unit, 27
... Reel rotation speed detection circuit, 28 ... Tape insertion detection circuit,
29 ... control head, 30 ... 31. Picture head,
32 magnetic tape, 33 take-up reel, 34 supply reel, 35 erroneous erasure prevention mode detection circuit, 36 TV
Signal input, 37 ... line video signal input, 38 ... line video signal output, 39 ... 40. Specific symbols for removing commercials, 41... Tape position cursor, 42... Playback stop symbols, 43, 44, 45... User symbols.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hisashi Ota 1410 Inada, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Visual Information Media Division

Claims (5)

[Claims] 1. A television signal recording / reproducing apparatus which records and reproduces a video signal, an audio signal and its program information signal on a magnetic tape, and switches a screen between a luminance change point of the video signal and a silent point of the audio signal. Means for judging a point, means for generating an absolute address from the start of winding of the magnetic tape to the current position, means for superimposing the information on the vertical retrace period of the video signal and recording the information on the magnetic tape, and the information signal Means for comparing the information reproduced from the magnetic tape with the stored information by comparing the absolute address from the start of winding of the magnetic tape to the current position with the stored absolute address. A television signal recording / reproducing apparatus for fast-forwarding a section from a screen switching point to a next switching point. 2. A means for judging that a screen switching point of a video signal is a switching point of a screen by means of measuring a time from a switching point to a next switching point. The signal recording / reproducing apparatus according to claim 1, characterized in that: 3. A means for displaying information on the recording contents of a magnetic tape stored in said storage means, a means for displaying whether or not a start / end unit of recording includes a screen switching point, and said automatic screen 2. A television according to claim 1, wherein a specific symbol is added to the display when the switching point of the screen is removed by the switching point identification means and when the recording is interrupted by the manual recording pause means. Signal recording / reproducing device. And means for displaying information on the contents of the recording of the magnetic tape stored in said storage means and means for adding a user identification code to a start / end unit of the recording. 2. The television signal recording / reproducing apparatus according to claim 1, wherein the information is displayed before starting recording and before starting timer reservation. 5. An absolute address of a position where the start / end unit of the recording is reproduced halfway is stored in a storage means, and when the same reproduction is performed again, the reproduction is performed halfway using the absolute address stored in the storage means. The television signal recording / reproducing apparatus according to claim 1, wherein reproduction is performed from a position.