JPH05152986A - Communication data recorder - Google Patents

Abstract

PURPOSE:To obtain a data communication system which can store exactly user's desired information by a simple method. CONSTITUTION:The data communication system transmits main data DATA being a main signal, and an index ID containing an index for showing the contents of this main DATA to a data transmission line 1 from a broadcast source. A communication data recorder connected to the data transmission line 1 sets in advance a user's desired index to a control circuit 15 through an index setting device 17, extracts an index by an index extracting circuit 11 and compares the extracted index and the index set to the control circuit 15 in a coincidence comparing circuit 14. When they coincide with each other, the control circuit 15 allows a signal storage circuit 16 to store the main data DATA from a signal delaying circuit 12.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a data communication system (system)
The compact disc (C
D), EFM (Eight Fourteen Modulation) used for recording digital audio tape (DAT), etc .: 8/1
4 Modulation method) A main signal by a modulation method such as a method and a signal of a data format using a subcode are transmitted through a communication line, and a desired main signal is selectively automatically extracted at a receiving side, and the recording can be performed. Data communication and recording method.

[0002]

2. Description of the Related Art For example, in cable broadcasting, a user views a broadcasting program of the cable broadcasting and selects a desired broadcasting program, or reserves a broadcasting date and time to automatically broadcast the program. ing.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned reservation registration system for cable broadcasting, the broadcast contents desired by the user are
For example, there is a problem in that it is only possible to make reservations in large units such as time units, and for example, it is not possible to select and register only music songs of a genre desired by oneself or only music songs desired by oneself. is there. As a result, there is a waste of registering music songs that one does not want, and further, for example, when editing the registered contents according to one's preference, a great amount of unnecessary labor is required for the editing. As a result, effective reservation registration cannot be realized. In addition, in the above-mentioned reservation registration, it is necessary to set the correct date and time with reference to the program in which the broadcast contents are posted, which is inconvenient because the setting of the date and time is troublesome.

The above-mentioned problem is not limited to wired broadcasting, but in various other cases where it is desired to reserve desired information in advance from a communication system for transmitting information and to automatically store (record) the content. Also becomes a problem similar to the above.

Therefore, it is an object of the present invention to provide a communication data recording device capable of effectively extracting and recording desired information from a communication system through which data is transmitted. A further object of the present invention is to provide a data communication system capable of effectively operating such a communication data recording device. The purpose is to provide a data communication method.

[0006]

In order to solve the above problems, the present invention transmits a main signal and a sub signal including data indicating the content of the main signal from a transmitting side to a receiving device, and the receiving device , When data indicating a main signal desired to be recorded is set in advance, and when the main signal and the sub-signal are received, when the data in the reception sub-signal is compared with the set data and they match each other, Provided is a communication data recording method characterized by recording a corresponding main signal. Preferably, the receiving device has means for registering data indicating a main signal desired to be recorded, means for inputting the transmitted main signal and sub-signal, and the set data and the input sub-signal. And means for recording the input main signal when the comparison results match. Further, specifically, the main signal and the sub signal are represented by a modulation format used for recording and reproducing on a recording medium equivalent to a compact disc or a digital audio tape, and the main signal is a music signal,
The data in the sub signal indicates the music signal of the main signal.

[0007]

In the data communication system of the present invention, the main signal and the sub signal including the data indicating the content of the main signal are transmitted from the transmission source to the receiving device. This main signal and side signal are
Specifically, it is represented by a modulation format used for recording and reproducing on a recording medium equivalent to, for example, a compact disc or a digital audio tape. In the receiving device, data indicating a main signal desired to be recorded is set in advance, and when the main signal and the sub signal are received, the data in the received sub signal is compared with the set data, and Record the corresponding main signal while doing. As a result, only the desired main signal can be selectively and automatically recorded.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a data communication system of the present invention and a communication data recording device used in this data communication system will be described with reference to FIG. This embodiment exemplifies a case where the present invention is applied to automatic reservation registration in a cable broadcast for transmitting music songs and the like.

A data transmission line 1 from a broadcast source (not shown)
To the communication data recording device shown in FIG. 1 via the main signal (main signal) in the signal transmission form (format) shown in FIG.
The main data DATA and the index ID as a sub signal (sub code) are transmitted. Main data DA
TA is a music song signal, and the index ID includes a signal indicating the music song name of the main data DATA.

More specifically, a broadcast source reproduces an EFM-modulated signal, which is a compact disc (CD) modulation method, and carries it on a data transmission line 1 for transmission. As is well known, the frame format of the CD, one frame has a 588 channel bits, the frequency is 7.35kH _Z. A 24-bit frame synchronization signal is provided at the head position of this one frame, a 14-bit sub-coding for one symbol is provided at a position corresponding to the index ID, and then a main data is provided at a position corresponding to the main data DATA. A signal is provided. The main signal has data and parity. The CD signal is EFM-modulated and has a 14-bit configuration as described above.

A signal of a music piece reproduced from a CD is arranged and transmitted as a main signal. Subcoding is 8
Two different codes P, Q, R, S, T, U, V, W are defined. When the subcode P is "1", it indicates the position of the beginning of the song. The sub-code Q stores time information such as the time from the beginning of the music and the absolute time from the beginning of the music on the innermost circumference of the disc. Other 6-bit subcodes RW can be freely used by the user. In the present invention, the data transmission line 1 is set by setting the code name of the music piece stored in the main signal as an index in these freely usable 6-bit subcodes R to W.
Be transmitted to.

Communication data for automatically recording a desired music piece by receiving the main data DATA (main signal) and index ID (sub-code) shown in FIG. 2 transmitted through the data transmission line 1 as described above. The configuration of the recording device is shown in FIG. The communication data recording device shown in FIG. 1 has an index extraction circuit 1 connected to a data transmission line 1.
1, signal delay circuit 12, coincidence comparison circuit 14, control circuit 1
5, a signal storage circuit 16 and an index setter 17. The communication data recording device is connected to the signal reproducing device 30 from the signal storage circuit 16.

The user sets a chord name of a desired music piece as an index in the control circuit 15 from the index setting unit 17, and this chord name (index)
Select from the broadcast programs distributed in advance.
The index extracting circuit 11 includes main data DATA in which the signals of the music pieces transmitted from the data transmission line 1 in the form shown in FIG. 2 are divided and the chord names of the music pieces are included in the subcodes R to W. It receives the index ID and extracts the code name, that is, the index. The main data DATA1 is branched to the signal delay circuit 12 and is delayed for a short time until the matching of the indexes described later is performed.

The coincidence comparison circuit 14 compares the index set in the control circuit 15 with the index extracted by the index extraction circuit 11. If they match,
The coincidence comparison circuit 14 sends a "high" level signal to the control circuit 1.
5, the control circuit 15 controls the signal storage circuit 16 to store the main data DATA delayed by the signal delay circuit 12 in the signal storage circuit 16. Signal delay circuit 12
As described above, the timing adjustment is performed only for the time required for the index comparison processing, and can be configured by, for example, a shift register. If the timing adjustment time is extremely short, the signal delay circuit 12 is used. Is unnecessary.

After the indexes match, the control circuit 15 controls the storage from the signal delay circuit 12 to the signal storage circuit 16 until the signal of the corresponding music piece is stored in the signal storage circuit 16. As the signal storage circuit 16, any storage medium suitable for storing a music song signal can be used. For example, an audio recording tape, a CD, a semiconductor memory, or any other storage medium can be used as the storage medium. If necessary, the control circuit 15
The contents stored in the signal storage circuit 16 can be displayed on a display device (not shown), for example, a liquid crystal display device.

The user can automatically reproduce the content stored in the signal storage circuit 16 in accordance with the reservation as described above through the signal reproduction device 30 at an arbitrary timing. As such a signal reproducing device 30, there is a CD stereo device or the like.

As described above, according to the first data communication system of the present invention, the music signal desired by the user is automatically stored by using the main signal and the sub-code of the frame of the CD recording system, and the user can arbitrarily store the music. Can be played at the timing of. The automatic registration can be performed in units of music songs desired by the user, and the user is freed from the problem that could not be avoided in the past that unnecessary music songs are registered.

When the above-mentioned subcodes R to W are used as indexes, the form of use is not limited to the above-mentioned code name of the music piece, but the genre of the music piece can be set. For example, if the genre is set to be classical, pop, jazz, etc., a user who likes classical music can set the index of the classical music from the index setting device 17 to the control circuit 15 so that the data transmission line is set. It is possible to automatically record all the signals of the classical music which are transmitted on the above 1 in the signal storage circuit 16.

The data communication system of the present invention and the communication data recording device in this data communication system are not limited to the above-mentioned music pieces. For example, a CD can store still images. Therefore, it is possible to transmit a still image, for example, a photographic image signal in addition to the music piece from the broadcasting source to the data transmission line 1 and store the photographic image signal in the signal storage circuit 16 in the receiving device. .. The photographic image signal stored in the signal storage circuit 16 is the signal reproduction device 3
It can be reproduced by an image processing device (not shown) different from 0.

Various other applications of the data communication system of the present invention can be considered. For example, the main data DATA which is the main signal may be character information, and the index ID which is the sub signal may include an index indicating the character information. The broadcasting source transmits character information such as professional information and news to the data transmission line 1, and the receiving device stores the character information desired by the user.

Next, a second embodiment of the data communication system of the present invention will be described. FIG. 3 shows a signal format to be transmitted in the second embodiment. The transmission signal format shown in FIG. 3 shows a case where the main data DATA as the main signal and the index ID as the sub code are simultaneously transmitted. The main data DATA and the index ID can be simultaneously transmitted in two cases, one in which the data transmission line 1 is two lines and physically transmitted in two systems.
When the main data DATA and the index ID having different frequencies are frequency-multiplexed and transmitted on the two coaxial cables,
Alternatively, it may be time-division multiplexed. In implementing the present invention, any type of simultaneous transmission method may be used, but as an example thereof, a case of frequency multiplexing will be described.

FIG. 4 shows the configuration of a communication data recording device for receiving the signal shown in FIG. 3 and recording a desired main signal. Also in this example, the content of the signal transmitted through the data transmission line 1 is music. The data communication system shown in FIG. 4 uses the index input circuit 21 and the match comparison circuit 2
2. It has a control circuit 23 and an index setter 24. In addition, the communication data recording device includes a main data input circuit 2
6, a signal delay circuit 27, and a signal storage circuit 28. The match comparison circuit 22, the index setter 24, and the control circuit 23 are respectively the match comparison circuit 1 shown in FIG.
4, corresponding to the index setter 17 and the control circuit 15. The signal delay circuit 27 and the signal storage circuit 28 are the signal delay circuit 12 and the signal storage circuit 16 shown in FIG.
It corresponds to.

The index extraction circuit 11 selects the frequency and inputs only the index ID. Further, the main data input circuit 26 inputs main data DATA having a frequency different from the index ID. In the coincidence comparison circuit 22, when the index input from the index input circuit 21 and the index set via the index setting unit 24 match, the control circuit 23 stores the signal from the signal delay circuit 27 in the signal storage circuit 28. To memorize. The reproduction of the disc stored in the signal storage circuit 28 is performed via the signal reproduction device 30.

Although the main signal and the sub-code transmitted through the data transmission line 1 have been described above by exemplifying the signal format of the CD, the embodiment of the present invention is not limited to the above-mentioned signal transmission mode, and the DAT, In addition, the signal form may be the same as or similar to the above-mentioned signal form. The modulation method is not limited to the EFM modulation described above, and any modulation method can be applied in the present invention. Furthermore, the index ID is the main data DATA
Need not be transmitted in a one-to-one correspondence with the main data DAT
It may be transmitted at a timing lower than A.

The above-mentioned transmission of the main signal and the sub-code is described only for the transmission of the music song signal, but these signals are transmitted by, for example, a TV using the same coaxial cable.
It is also possible to transmit simultaneously with the signal at a frequency different from the TV signal. Therefore, according to the data communication system of the present invention, for example, by transmitting the above-mentioned main signal and sub-code from the CATV broadcasting station via a CATV cable for performing TV broadcasting, an arbitrary main signal is stored in the receiving device. You can Also from the CATV broadcasting station to TV
Alternatively, when transmitting a movie broadcast including video and audio of a video, the user can receive the desired movie broadcast, record it on a video device, and reproduce the recorded content later.

The data transmission line 1 shown in FIGS. 1 and 4 is not limited to the above-mentioned coaxial cable or a wire such as an optical fiber cable, but may be a wireless communication line. In that case, the communication data recording device
It suffices to add an antenna, a transmission / reception circuit, etc. that are provided for ordinary wireless reception.

[0027]

As is apparent from the above, various signals are transmitted in the data communication system of the present invention.
Any desired one of these transmitted signals can be selected by the user and automatically stored. Further, by using the data communication system and the communication data recording device of the present invention, the transmission data desired by the user can be easily stored accurately.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a first embodiment of a communication data recording device of the present invention.

FIG. 2 is a diagram showing a format of transmission data received by the communication data recording device shown in FIG.

FIG. 3 is a diagram showing a format of transmission data different from the transmission data format shown in FIG.

FIG. 4 is a circuit configuration diagram of a second embodiment of the communication data recording apparatus of the present invention adapted to the transmission data format shown in FIG.

[Explanation of symbols]

1 ... Data transmission line, 11 ... Index extraction circuit, 12 ... Signal delay circuit, 14 ... Match comparison circuit, 15 ... Control circuit, 16 ... Signal storage circuit, 17 ... Index setting device, 21 ...・ Index input circuit, 22 ... Matching comparison circuit, 23 ... Control circuit, 24 ... Index setting device, 26 ... Main data input circuit, 27 ... Signal delay circuit, 28 ... Signal storage circuit, 30 ... Signal reproduction device.

Claims (3)

[Claims] 1. A main signal and a sub-signal including data indicating the content of the main signal are transmitted from a transmitting side to a receiving device, and the receiving device sets data indicating a main signal desired to be recorded in advance. A communication data recording method characterized in that, when a main signal and a sub signal are received, the data in the received sub signal is compared with the set data, and when they match, the corresponding main signal is recorded. .. 2. The receiving device comprises means for registering data indicating a main signal desired to be recorded, means for inputting the transmitted main signal and sub-signal, and sub-input means for inputting the set data. 2. The communication data recording system according to claim 1, further comprising means for comparing the data in the signal and means for recording the input main signal when the comparison results match. 3. The main signal and the sub signal are represented by a modulation format used for recording and reproducing on a recording medium equivalent to a compact disc or a digital audio tape, and the main signal is a music signal, and the sub signal is The communication data recording system according to claim 1 or 2, wherein the data in the inside indicates a music signal of the main signal.