JP3363737B2 - Scramble broadcast recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002]

2. Description of the Related Art When timer recording is attempted by a recording device having a built-in receiver, a program is usually set based on a broadcast program table.

For scrambled broadcasting in which the pay portion is scrambled, within the time shown in the broadcast program table,
Before and after the main part, there are programs that broadcast program introductions and commercials. Therefore, if several such broadcasts are continuously timer-recorded, the recording medium will be wasted, and when reproducing the recorded portion, program introductions and commercials that are useless parts will be searched. I have to fast forward at.

On the other hand, the program does not end even when the program-set end time is reached, such as when the target program does not start on time due to a temporary program or when the broadcast time is extended by live broadcasting. A situation occurs in which the end is cut without being recorded.

Therefore, as a means for solving these problems, when a scrambled signal is recorded, the signal is generated by a control signal indicating whether or not the descramble processing is performed by the descrambling device, and the signal is sent to the recording device. Has been disclosed (Japanese Patent Laid-Open No. 7-255045) in which timer recording is executed only when descramble processing is performed by transmitting.

In fact, when looking at WOWOW, which is one of the pay broadcasts currently being broadcast in Japan, the scramble is applied only to the main part. Therefore, if the invention is used, it is flown before and after the main part. Program announcements and commercials will not be recorded.

[0007]

SUMMARY OF THE INVENTION In the above conventional invention,
A communication line must be newly provided between the descrambling device and the recording device, but since the descrambling device is a separate device from the recording device, an extra cable or connector is newly provided. There must be.

Further, it goes without saying that the descramble devices which are currently in widespread use have not been dealt with,
Not compatible. In addition, when the program is extended, the latter part may be cut off without being recorded.

[0009]

[Means for Solving the Problems] In the case of timer recording a scrambled broadcast, a means for decoding whether or not scrambled data included in a control signal sent at the same time as the scrambled broadcast is decoded, and a device for decoding the data Having means for transmitting the determined result to the microcomputer,
A control circuit such as a microcomputer controls the recording so that only the time when scrambled is recorded.

Further, when the recorded program is started later than the scheduled time, the timer recording is terminated by giving priority to the scramble determination result rather than the timer recording end time.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, the start / stop of a recording device is checked by observing a bit included in control data of a bit stream obtained by demodulating a received signal of a scrambled broadcast and indicating whether or not scrambled. It is characterized in that the end time is controlled. An embodiment of the present invention will be described below.

FIG. 1 shows a V which can receive satellite broadcasting according to the present invention.
FIG. 2 is a block diagram showing a circuit configuration when implemented in TR, FIG. 2 is a timing chart when the present invention is implemented when a program starts and ends on a regular basis, and FIG. 3 is a flowchart showing microcomputer processing of the present invention. FIG. 4 is a timing chart when the present invention is carried out when the program starts with a delay.

First, the block diagram of FIG. 1 will be described. The RF signal received by the antenna 1 is selected and FM demodulated by the broadcast receiving circuit 2, and a detection signal 11 is obtained. Further, the detected signal 11 is demodulated by the 4-layer DPSK demodulation circuit 4 and becomes a bit stream signal 12. The detection signal 11 and the bit stream signal 12 are descrambled by the descrambling device 5 and then returned to the video / audio recording circuit 8 to become recording sources 13 and 14.

Further, the detection signal 11 becomes a recording video source at the time of reception other than scrambled broadcasting via the video de-emphasis circuit 3, and the bit stream signal 12 is a PC.
After being decoded by the M decoder 6, it is D / A converted by the audio D / A converter 10 and becomes a recorded audio source at the time of reception other than scrambled broadcasting.

Reference numeral 9 denotes a recording source selection switch having two circuits.
The signal connected to the video / audio recording circuit 8 is switched depending on whether the received broadcast is scrambled or not. Therefore, when the received broadcast is not the scrambled broadcast, the switch is selected to the left in FIG. 1, and when the received broadcast is the scrambled broadcast, the switch is selected to the right.

Here, the broadcast receiving circuit 2, the video / audio recording circuit 8 and the recording source selection switch 9 are controlled by the timer function built-in microcomputer 7 having a timer function. Further, of the data decoded by the PCM decoder 6, the detection result of the bit indicating whether or not the video signal is scrambled is transmitted to the microcomputer 7 with a built-in timer function, and the video / audio recording circuit 8 is operated by the timer. Used as a control signal when moving.

Next, with reference to the timing chart of FIG. 2 and the flowchart of FIG. 3, a case in which commercials and program reservations are included before and after a program in the embodiment of the present invention will be described.

As shown in FIG. 2, (A) is the program schedule, (B) is the recording time required for timer reservation, and (C) is the recording time.
6 shows the recording results recorded by the video / audio recording circuit 8 according to the present invention.

As a breakdown of the program schedule described in the program guide, as shown in (A), the program main part and the program preview or commercial before and after the main part are sent, but the scramble is applied only to the main part. , The bit indicating whether or not the video signal is scrambled also moves accordingly. Therefore, the bit data is read by the PCM decoder 6, sent to the microcomputer 7 with a built-in timer function for recognition, and the video / audio recording circuit 8 is controlled so as to execute recording only when the scramble is turned on. As shown, commercials other than the main part can be cut.
Even when the programs are continuously recorded, only the main part is continuously recorded.

FIG. 3 shows the above procedure. When the timer is reserved (step 1) and the timer recording start time (step 2) comes, the microcomputer 7 with a built-in timer function determines whether the scramble signal priority recording is set or not (step 3). In the case of the scramble signal priority reservation, the system waits until the scrambled broadcast is received (step 10), starts recording when the scrambled broadcast is received (step 11), and continues recording until the scramble of the received broadcast is released (step 1).
2) If the scramble is released, the recording is terminated (step 6) and the process returns to the start (step 7).

Here, the setting of scramble signal priority recording is set by an external operation member or one item of timer recording reservation. Further, (step 4) and (step 5) show a procedure of normal timer recording in which scramble signal priority recording is not set. Therefore, when the timer recording start time comes (step 2), the recording starts (step 4), and when the timer recording end time comes (step 5), the recording ends (step 6).

FIG. 4 is a timing chart in the case where the operation is started later than the scheduled time for some reason. As shown in FIG. 4, (D) the program schedule, (E) the actual broadcast time, (F) the recording time required for timer reservation,
(G) shows a recording result recorded by the video / audio recording circuit 8 according to the present invention.

As shown in (E), a program that starts later than the scheduled time will continue to be broadcast even after the programmed end time. Therefore, if the recording is ended at the end time set in the timer, naturally the latter half of the program will not be recorded and will be cut off. Therefore, as described above with reference to FIG. 3, by giving priority to the determination of scramble OFF over the end of the program, the recording is continued until the end of the program, and it is possible to prevent the end of the recording of the program. That is, the end of timer recording is determined by detecting the descrambling.

Further, the difference between the actual main program start time and the timer recording start time can be calculated by the microcomputer 7 with a built-in timer function, and the timer recording end time can be extended by the difference to record the main program to the end. . The procedure is shown in FIG. Note that the overlapping parts described in FIG. 3 are omitted.

When the scrambled broadcast is received (step 10), the difference between the timer recording start time and the actual recording start time, that is, the delay time is calculated by the timer function built-in microcomputer 7 (step 2).
0), the delay time is added to the timer recording end time (step 21). Then start recording (step 2
2) When the timer recording end time comes (step 5),
The recording is ended (step 6).

In the above description, the case where the control circuit is composed of a microcomputer has been described, but DSP and other custom I
It goes without saying that it can be configured with C.

[0027]

As described above, according to the present invention, when a scramble signal is recorded, it is possible to record and cut the program introductions and commercials existing within the start and end times described in the program table. When recording several programs continuously with a timer, it is not necessary to skip between programs by fast-forwarding or searching, and the tape can be used effectively.

Furthermore, by giving priority to the scramble discrimination over the timer end time, it is possible to prevent the recording from being cut off due to the extension of the program or the delay of the start time.

In addition, the present invention can be implemented with almost no increase in cost because only one system interface is added to the circuit already existing in the device. Further, there is no need to make any changes to the descramble apparatus which is currently popular, which is also advantageous in terms of compatibility.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration when the present invention is applied to a VTR capable of receiving satellite broadcasting.

FIG. 2 is a timing chart when the present invention is carried out when a program starts and ends on a regular basis.

FIG. 3 is a flowchart showing a microcomputer process of the present invention.

FIG. 4 is a timing chart when the present invention is implemented when a program starts with a delay.

FIG. 5 is a flowchart showing the microcomputer processing of the present invention when the timer recording end time is extended by the difference between the main part start time and the timer recording start time to record the main part to the end.

[Explanation of symbols]

1 ... Antenna 2 ... (scramble) Broadcast receiver circuit 3 ………… De-emphasis circuit for video 4--layer 4-layer DPSK demodulator 5 ……… Descrambler 6 ... PCM decoder 7 ... Microcomputer with built-in timer function 8 ... Video / audio recording circuit 9 ... Recording source selection switch 10 ... Voice D / A converter 11 ... Detected signal 12 ... Bitstream signal 13 ... Scrambled audio signal 14 ... Scrambled video signal 15 ... Signal signal for whether or not scrambled

Claims (3)

(57) [Claims] 1. A receiving means for receiving a broadcast signal, a recording means for recording a received signal received by the receiving means, and a timer reservation means for starting or stopping the operation of the receiving means and the recording means at a designated time. A control means for controlling the receiving means, the recording means and the timer reservation means by a microcomputer, a judgment means for judging whether or not a scramble signal is applied to the received signal, and a recording set by the timer reservation means. Setting means for setting a scramble priority reservation that starts or stops recording based on the determination result of the determination means in preference to the start or stop time of, and the timer is set when the scramble priority reservation is set. From the start time set by the reservation means, the determination means determines whether or not the scrambled signal is applied to the received signal, With start operation of the recording means when it is judged that rumble signal is applied,
A scrambled broadcast recording apparatus, wherein the operation of the recording means is stopped when it is determined that the scrambled signal is not applied. 2. The scrambled broadcast recording apparatus according to claim 1, wherein the determination result of the determination means is given priority over the end time set in the timer reservation means to continue recording. apparatus. 3. The scrambled broadcast recording apparatus according to claim 1 or 2, wherein the decoder is controlled by a decoder and a microcomputer built in the apparatus to determine the determination unit. Scramble broadcast recorder.