JPS61281634A - Music broadcasting system - Google Patents

Abstract

PURPOSE:To grasp easily the present request condition by a receiver by performing successively automatically the requested music from a receiver which is transmitted at the transmitting side, transmitting the information to show the request condition through an empty channel and displaying it at the receiving side. CONSTITUTION:After a receiver confirms that the telephone number is registered, a requested music number is successively inputted. The requested music number is supplied to a host computer 6, and the host computer 6 schedules successively the requested music, informs a request responser 5 and converts the schedule table to the television signal. After the television signal is modulated by a modulating device 8, the signal is mixed at a head end 9, and sent through a cable to a receiving side 2. The receiving side selects a television receiver 12 to a shedule table broadcasting channel, and thereby said side can watch the schedule table. Thus, the self-request can be confirmed or the reservation condition of other side can be confirmed.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Outline of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems (Fig. 1) Figure) G2 signal format (Figures 2 to 4) G3CADA
Transmitter/receiver configuration (Figures 5 and 6) H Effect of the invention A Industrial application field This invention makes a telephone request to an automatic performance device on the transmitting side via a public line, and sends the requested song to the receiving side. The present invention relates to a music broadcasting system capable of transmitting.

B. Summary of the Invention This invention transmits request information to the transmitting side via a telephone line, compares the transmitted request information and registered information to automatically perform the performance, transmits the performance signal to the receiving side, and transmits the performance signal to the receiving side. This system allows the receiver to easily understand the current request status by automatically playing the requested songs one after another, and by transmitting information indicating the request status via an empty channel and displaying it on the receiving side. It is.

C. PRIOR TECHNOLOGY In a conventional music broadcasting system, a receiver receives a requested song by telephone, and the broadcasting station selects an appropriate song from among the requested songs and broadcasts the received song. Therefore, just because a request is made does not necessarily mean that the requested song will be played. In other words, the receiver only makes a request, and whether or not the requested song is played depends on the judgment of the operator at the broadcasting station, which is a so-called one-way system.

Further, as a conventional music broadcasting system, a two-way CATV system is described in Japanese Patent Laid-Open No. 58-223980.

D. Problems to be solved by the invention However, in the case of conventional music broadcasting systems, as mentioned above, it is a one-way system, so it is difficult to receive requests from receivers, and it is difficult for broadcasting stations to respond to requests from receivers. There is an inconvenience that the operator has to perform each operation. Furthermore, since the performance signal is FM modulated and transmitted as an analog signal, the sound quality is poor, and furthermore, there is no way for the receiver to know the current request status, which is inconvenient.

This invention was made in view of these points, and provides high-quality music that allows the recipient to easily respond to the request, can be played automatically, and allows the recipient to easily understand the current request status. The present invention provides a music broadcasting system capable of broadcasting.

E Means for Solving Problems The music broadcasting system according to the present invention includes first transmission means (16), (17), (3), which transmits request information to the sending side (1) via a telephone line. (4) Compare the transmitted request information and registration information,
Control means [5) for controlling the automatic performance device (7), (
61, and second transmission means (8) to (11) for transmitting the performance signal from the automatic performance device and information representing the request status to the receiving side (2), It is configured to be transmitted via a channel and displayed on the receiving side.

F action first transmission means (16), (17) (31, (
41 transmits the request information including the recipient's (contractor's) telephone number and the requested song number to the transmitting side (11) via the telephone line.The control means (5) and (6) The registered information is compared, and if the search 1 determines that they match, the automatic performance device (7) is controlled to perform the automatic performance.The performance signal is transmitted to the second transmission means (8).
- (11) via the digital transmission system included in the receiving side (2), and transmitting information representing the request status including at least the title and start time of the program to the receiving side via an empty channel; It should be displayed as ＼.

G Example Hereinafter, an example of this invention will be described as a compact disc (CD).
) will be explained in detail based on FIGS. 1 to 9, taking as an example the case of automatic performance.

G□Circuit configuration and operation Figure 1 shows the overall configuration of this embodiment. In the figure, (1) is the transmitting side (broadcasting station), (2) is the receiving side, and the transmitting side ( 11 is provided with an exchange (3) to which a telephone line from the outside is connected, and this exchange (3) is connected to a CD requestless Bonsa (5) via a modem (4). The CD request responder (5) is the recipient (contractor) from the receiving side (2).
Request information including a telephone number and a requested song number is sent to a host computer (6), and a CD changer (7) as an automatic performance device is controlled according to instructions from the host computer (6).

Registered in the host computer (6) are telephone numbers of recipients (contractors) who have receivers capable of receiving request services, contract statuses of receivers capable of receiving request services, and the like. Therefore, when the recipient's telephone number is input, the host computer (6) performs a search 1 to determine whether or not it is a registered telephone number, and notifies the recipient by voice over the telephone. In addition, when the host computer (6) confirms that the recipient's phone number is registered and the requested song number is input, the host computer (6) schedules the requested songs in order, and sends the request songs to the CD request response Boncer (5).
The schedule sheet containing at least the program title and start time is converted into a television signal and sent to the receiving side (2) via a modulator (8) and a head end (9).
Send to.

In addition, a transmitter (hereinafter referred to as a CADA transmitter) αφ that converts an analog signal transmitted via a cable to a digital signal and transmits it to the CD requestless Bonsa (5) is provided. The output is fed to the headend (9). A microcomputer (1 unit) is also provided to control the operation of the CADA transmitter.

The output side of the head end (9) is connected via a cable to the television receiver (12) on the receiving side (2), and is also a receiver that converts the digital signal transmitted via the cable into an analog signal. (hereinafter referred to as the CADA receiver) (13). CAD＾Receiver (13
) is amplified by the amplifier (14) and then sent to the speaker (1
5).

Further, a telephone (16) is provided in the receiving side (2),
An exchange (17) is provided between this telephone (16) and the exchange (3) on the sending side (1).

Next, the operation of the circuit shown in FIG. 1 will be explained. First, the receiver calls the sender (11) using the telephone (16), confirms that the public line is connected, and then inputs the receiver's telephone number.

This input recipient telephone number is supplied to the host computer (6) via the CD request response Boncer (5) etc., and the host computer (6) receives the telephone number in which the input recipient telephone number is registered. A search 1 judgment is made as to whether or not this is the case, and the recipient is notified by voice through the telephone (16).

After confirming that the recipient has registered their phone number, they enter the requested song number (there may be more than one) in sequence. This requested song number is also supplied to the host computer (6) via the CD request responder (5) etc., and the host computer (6) sequentially schedules the requested songs and notifies the CD request responder (5). Convert schedule table to TV signal. This television signal is modulated by a modulator (8) and then sent to the head end (9).
is mixed and sent to the receiving side (2) via cable.

The receiving side can view the schedule by tuning the television receiver (12) to the schedule broadcasting channel, and thereby can confirm its own request or check the reservation status of others.

In addition, the DC requestless boner (5) sends the CD changer (7) based on the schedule notified as described above.
and sequentially send signals corresponding to the requested songs to CADA.
Transmitter transmitter transmits a signal. The CADA transmitter αΦ sends control information and data (music source) from the microcomputer (11) to the receiving end (2) via the head end (9). When the CADA receiver (13) on the receiving side (2) is certified as a receiver capable of request service based on the transmitted control information, it broadcasts the requested music via the amplifier (14) and speaker (15). It makes a sound. That is, the CADA receiver (13) receives the channel service format (C in Figure 4) of the channel selected by the receiver, and determines that the tier level of the channel is the same as the own tier level (unique service format (A in Figure 4)). Outputs the broadcast of the selected channel only when the value is smaller than that.

G2 Signal Format Figures 2-7 illustrate the signal format used in the digital transmission system of the CADA transmitter αφ and the CADA receiver (13). Figure 2 shows the data format of one word, and one word consists of 168 bits, and as shown in Figure 2A, for example, an 8-bit synchronization signal 5ync, and a service bit consisting of 4 bits from SR to SB4. SB, 128 bits (3 per 1CH)
It consists of data of 2 bits for 4 channels) and a 28-bit error check code C3 (7 bits per ICl for 4 channels) added to this data. The data other than the synchronization signal and the service bit and the error check code are subjected to so-called bit interleaving, in which the data and error check code of each channel are exchanged bit by bit, as shown in FIG. 2B.

FIG. 3 shows the data former node of one frame. This one frame consists of 256 words, each word having the data format shown in FIG.
B, data and error check code C3 constitute the first word at the beginning, and the next second word is word sync W.
ard 5sync (1), service bit SR.

It consists of data and error check code C3, and the next third word is similarly word sync-ard 5sync (
2), service bit SB, data and error check code C3;
Word is word sync-ard 5sync (255
), service bit SB, data and error check code CS.

Incidentally, 4 service bits per word becomes 1024 bits per frame. In other words, each frame includes 256 bits of SB1 to SB4. Therefore, in the present invention, as will be described later, the 256 bits (predetermined number of bits) of each of SB□ to SB4 are used to send control data to each receiver.

The format for sending control data using service bits consists of five types of formats, as shown in FIG. That is, FIG. 4A shows a unique service format (Unique SBFormat),
Figure 4B shows the group service format (Group
SB Format), Figure 4C shows the channel service format (Channel SB Format).
at ), the fourth diagram is the all-service format (A
LL SBFormat), Figure 4E shows the Scrambling key format (Scrambling key format).
y Format ) are shown respectively. Furthermore, Figure 4A
-E, H is a header for identifying each format, C is a command for instructing each receiver what operation to do, T and Na are the address numbers of the receivers,
Gull is a group number, Tie, which is grouped in any manner such as the area where each receiver is located or the owner's occupation.
r is the tier level representing the contract conditions of each receiver, such as allowing reception if it is below a predetermined level and not being able to receive it if it exceeds a predetermined level, and CH and NO are data such as music broadcasts transmitted by this system. Channel number representing the channel, KEY is descrambling key data (initial value data of M series) for descrambling data,
C3 represents an error check code. Further, as shown in FIG. 5, the command C in FIG. 4 includes commands such as start of emergency broadcast, start of communication broadcast, start of fax, start of data loading, etc.

As shown in FIG. 6, for example, in odd-numbered frames, each format in FIG.
SF or the channel service format C5F or the scrambling key format ssp are sent out alternately, while in even-numbered frames the unique service format υSF is sent out individually, respectively.

FIG. 7 shows how the unique service format is assigned to each receiver in memory on the transmitting side. For example, the address numbers T and N of the receivers are
When a is expressed as a binary number and the lower two bits are "OO", the unique service format shown in Figure 7A is "0".
1", the unique service format as shown in Figure 7B is used, "10", the unique service format as shown in Figure 7C, and 11", the 7th unique service format is used.
Allocate each unique service format as shown in the figure. Of course, these four types of unique service formats have different contents except for head H. In the figure, N represents a memory address, and L represents the length of the unique service format.

Next, how control data for controlling the receiver is added to the service bits will be explained separately for the receiver and the transmitter.

First, on the transmitter side, as will be described later, there is a memory for simultaneous information corresponding to all service format, channel service format, and scrambling key format, a memory for group information corresponding to group service format, and a unique memory. A memory for individual information corresponding to the service format and three memories are arranged, and each data is transmitted alternately at the timing shown in FIG. 5, as described above. Then, the data in the memory for simultaneous information and the memory for group information can be received in S81 to S81 so that the data can be received no matter which service bit the receiver selects.
The same data is transmitted to B4. Furthermore, when transmitting a unique service format by adding it to the service bit, the memory map for individual information is set as shown in FIG. 4A.

As described above, among the service bits S81 to SB4, the unique service format shown in FIG. 7A is added to Sth, the unique service format shown in FIG. 7B is added to SB2, and the unique service format shown in FIG. 7B is added to SB3. Adding the unique service format shown in Figure 7C,
The unique service format shown in Figure 7 is added to B4. And when adding a unique service format to the service bit for high-speed addressing,
The unique service format is transmitted in the even-numbered frame sections shown in FIG. 5, and at the same time, it is also temporarily transmitted in the odd-numbered frame sections. As a result, the cycle of the unique service format becomes longer depending on the number of receivers, but the cycle of the group service format is much shorter, thereby enabling high-speed transmission.

On the other hand, on the receiver side, 4 bits S81 added to one word
~ Among the service bits of SB4, the own address number (
T,! Input 1 bit of service bit according to 1h). In other words, the last two bits of its own address number are @00”
It is like inputting SBi when it is "01", SR2 when it is "10", SB3 when it is "10", and SB4 when it is "11".

Then, the service bit corresponding to this own address number is input during one frame period in synchronization with the frame synchronization signal. At this time, since the service bits are transmitted in a serial format, data sampling and data error checking can be easily performed by using the serial port of the microcomputer.

Next, of the service bits sampled during one frame period, only the data part excluding the start bit and stop bit is synthesized. The format is as shown in FIG. 4 mentioned above. In other words, data sampled during one frame period conforms to any of the formats A to H in FIG. 4. In each of the formats shown in Figures 4A to 4E, the unique service format and other service formats are transmitted alternately every frame as shown in Figure 5 above, and the identification of these formats is indicated at the beginning of each format. This is done by the inserted header H.

Next, the processing performed when each formant is received will be explained. First, in the case of the unique service format, the receiver whose own address number matches the address number specified by the address number T and the circle is assigned the group number G, 1.
Execute the process specified by the group number specified by 1h and the tier.

For group service format, group number G
, 1VkL, the receiver belonging to the group number specified by command C performs the process specified by command C.

That is, a receiver whose stored group number G, 11h specified in the unique service format matches the group number specified in the group service format performs the process specified by command C.

In the case of channel service format, the tier level of the data channel (music broadcast, etc.) transmitted by this system is specified for all receivers. Then, the tier level of the channel selected by the user is specified in the unique service format, and the service is started for the user only when it matches the stored tier level.

In the case of the all-service format, the command C specified unconditionally is processed, and in the case of the scrambling key format, data is descrampled using the key code specified unconditionally.

03CAD transmitter/receiver configuration Figures 8 and 9 show the CADA transmitter α0) and the CADA
3 shows an example configuration of a receiver (13);

First, let us explain about the CADA transmitter 0ω in Fig. 8.
For example, analog information of stereo music is supplied to input terminals (21) and (22), and input terminals (23) and (22) are supplied with analog information of stereo music.
4) is supplied with analog information for communication broadcasts and guidance broadcasts, and facsimile information is supplied to the input terminal (25).
Digital information such as game software is supplied to the input terminal (26). Analog information from input terminals (21) to (24) is converted from analog signals to digital signals in analog-to-digital converters (hereinafter referred to as A/D converters) (27) to (30), while input terminals (25) ) is supplied to a multiplexer (32) via a facsimile interface circuit (31). Further, the digital information is directly supplied from the input terminal (26) to the multiplexer (32). The input signal is then distributed to each channel by the multiplexer (32), subjected to signal processing such as addition of an error check code and bit interleaving, and then output. The output signal from the multiplexer (32) is supplied to one input terminal of a multiplier (33), and the M-sequence signal generator (34) supplies the M-sequence signal generator (34) to the other input terminal of this multiplier (33). The signal is multiplied and scrambled.

The data and error check code thus scrambled are supplied to the next stage synchronization signal/service bit generator (35), where the synchronization signal and service bit are inserted. At this time, the memory (37) is controlled by the controller (36).

The above-mentioned collective information, group information, and individual information are extracted from (38) and (39), and supplied to the synchronization signal/service bit generator (35) to be added to the service bit. Further, the M-sequence signal generator (34) is configured to have its initial value (descramble key data) set in synchronization with the frame synchronization signal by the controller (36). Additionally, this initial value is changed at regular intervals to increase security.

In this way, the signal into which the synchronization signal and service bit have been inserted into the data is subjected to AM modulation through a binary transversal filter (40) as an equalization layer to match the frequency characteristics of the entire transmitting and receiving system to eliminate code interference. The carrier wave from the oscillator (42) is modulated by the output signal from the filter (40). An intermediate frequency signal is therefore obtained at the output of the modulator (41), which signal is fed through a vestigial sideband filter (43) to a mixing circuit (44) where it receives the local oscillator signal from the local oscillator circuit (45). It is mixed with a frequency signal, frequency-converted, and outputted as a signal representing the difference between the local oscillation frequency and the intermediate frequency signal. In addition, the oscillation circuit (45)
The local oscillation frequency of is set to a frequency higher than the transmission frequency of any channel by the intermediate frequency. The transmission channel is therefore determined by selecting the local oscillator frequency.

The output signal from the mixing circuit (44) passes through a bandpass filter (46) and is taken out to an output terminal (47), and the signal from this output terminal (47) is sent to the head end (9) of the CATV system (Fig. 1). Supplied. The signal from the headend is then supplied to the receiving side via the CATV line.

The signal thus transmitted via the CATV line is supplied from the input terminal (51) of the CADA receiver (13) shown in Fig. 9 to the front end (52), where it is amplified and then frequency is converted into an intermediate frequency signal. This intermediate frequency signal is supplied to an AM detector, such as a PLL detector (53), where the baseband signal is demodulated. Although the AM detector used in conventional television systems may be used, it is preferable to use a PLL detector as described above in order to avoid waveform distortion.

Also, a part of the output of the PLL detector (53) is supplied to the AGC circuit (54), which causes the front end (53) to
AGC is applied to 2).

The output from the PLL detector (53) is sent to the data regeneration circuit (5
5), and here, based on the clock signal regenerated by the clock regenerator (56) from the output of the PLL detector (53), the level is recognized at the widest point of the eye pattern and digital data is extracted. This extracted data is sent to the next stage synchronization signal/service bit separator (5
7), where the synchronization signal and service focus are separated from the data and supplied to the controller (58), and the controller (58) performs various control operations in synchronization with the synchronization signal. The control data added to the bits is stored in the memory (59) via the controller (58).

The data from the synchronization signal/service bit separator (57) is then supplied to one input terminal of a multiplier (60), and the M-sequence signal generator ( 61), and thereby the data is descrambled and extracted. Incidentally, when changing the initial value of the M-sequence, the M-sequence signal generator (61) is set to its initial value in synchronization with the transmitting side under control from the controller (58).

The data from the multiplier (60) is transferred to the demultiplexer (62).
), where signal processing such as data rearrangement (bit de-interleaving) and error correction is performed.

The digital signal from the demultiplexer (62) passes through switches (63) and (64) to the D/A converter (
65) and (66), where the digital signal is converted into an analog signal and then output to the output terminal (67).
, (68), respectively. In addition, the switch (6
3) is on the contact a side, the transmitting side input terminal (21
) (Fig. 8), a signal corresponding to the information from the input terminal (22) (Fig. 8) when the contact is on the A side, and an input signal when the switch (64) is on the contact A side. A signal corresponding to the information from the terminal (23) (Fig. 8), when it is on the contact side, the input terminal (24)
) (FIG. 8) are time-divisionally switched and taken out by address signals from the demultiplexer (62).

A facsimile signal from the partial demultiplexer (62) is taken out to an output terminal (70) through a facsimile interface circuit (69), and digital data such as game software is taken out directly to an output terminal (71).

Although the above-mentioned embodiment has been described with reference to the case where a CD is automatically played, the present invention is not limited thereto, and can be similarly applied to other recording media, such as conventional records and cassette tapes.

H Effects of the Invention As described above, according to the present invention, request information is transmitted to the sending side via a telephone line, automatic performance is performed, and the performance signal is sent to the receiving side, making it easy to accept requests from the receiving side. The so-called two-way system becomes possible. Furthermore, since an automatic performance device is used, songs requested by recipients can be automatically played in sequence, and since they are transmitted digitally, high-quality music broadcasting is possible. Furthermore, since the current request status screen is converted into a television signal and transmitted using an empty channel, the recipient can easily know the request status using a television receiver. Furthermore, the host computer compares the request information and the registered information,
Since the search 1 determination is made, only the subscriber can receive the requested service.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of this invention, FIGS. 2 to 7 are diagrams showing an example of a signal format used in this invention, and FIG. 8 is a CADA used in this invention.
FIG. 9 is a block diagram showing an example of a transmitter, and FIG. 9 is a block diagram showing an example of a CADA receiver used in the present invention. (1)° is the sending side, (2) is the receiving side, (31, (17)
is a switch, (4) is a modem, (5) is a CD requestless Bonser, (6) is a host computer, and (7) is a CD
changer, (8) is a modulator, (9) is a head end,
α0) is a CADA transmitter, (12) is a television receiver, and (13) is a CAD receiver.

Claims (1)

[Scope of Claims] A first transmission means for transmitting request information to a transmitting side via a telephone line; a control means for comparing the transmitted request information with registered information and controlling an automatic performance device; a second transmission means for transmitting the performance signal from the automatic performance device and information representing the request status to the receiving side, the information representing the request status being transmitted via the empty channel and displayed on the receiving side A music broadcasting system characterized by: