JPH0442697A - Receiver - Google Patents

Abstract

PURPOSE:To relieve the output level difference due to a difference from sources by providing a means varying a level corresponding to an output level of plural electronic equipment and correcting a difference from output levels of the plural electronic devices with the level variable means in response to the source information from a master room so as to adjust the difference automatically. CONSTITUTION:A level variable means 78 corresponding to an output level of plural electronic equipments is provided to multi-link receivers 25 - 27 and the level variable means 78 corrects a difference from output levels of the plural electronic equipments in response to source information from a master room. That is, when one of the plural electronic equipment being sources is selected by a remote controller, the level of the level variable means is adjusted automatically to be a prescribed level by the source information from the master room in response to the selection. Thus, it is not required to attain level matching manually every time various equipments are selected by the selection of the remote controller.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a receiving device suitable for use as a receiving means of a home bus system.

[Summary of the invention]

The present invention relates to a receiving device suitable for use as a receiving means of a home bus system, and the present invention relates to a receiving device that is suitable for use as a receiving means of a home bus system, and is connected to a receiving means arranged in a sub-room from a master room in which source sources consisting of a plurality of various electronic devices are centrally arranged, via a cable. , a receiving device configured to transmit data from a source, comprising level variable means corresponding to output levels of a plurality of electronic devices,
Depending on the source information from the master room side, the input level is automatically adjusted according to audio input signals of different levels from multiple sources by using a level variable means to compensate for differences in the output levels of multiple electronic devices. This adjustment reduces output level differences due to differences in sources.

[Conventional technology]

BACKGROUND ART Recently, home bus systems have been put into practical use in which various electronic devices such as a personal computer, a lighting control terminal, and a gas leak detection means are connected via transmission cables to perform various controls in the home.

Furthermore, the present applicant has proposed a multi-link system (hereinafter referred to as MLS), etc., which allows audio and video information to be distributed to each room in the home via wire from one location and the information to be viewed as appropriate. This MLS is configured as shown in FIG.

In the figure, a master room (2) is a basement or a reception room among multiple rooms in a house (1), and a multi-link center (3) such as a multi-preamplifier is installed in this master room (2). Set up this multi-link center (3)
For example, a CD player (4),
Tape cassette deck (5), DAT deck (6), A
M, FM tuner (7), VTR (8), laser disc player (9), left and right speakers (12L) (1
Main amplifier (10) including 2R), TV receiver (13)
), etc., and a remote controller (hereinafter referred to as remote control) (14) even in the master room (2).
The user can view the desired audio information (16) and video information (15) in these plural devices by performing the following operations.

Multi-link center (3) in this master room (2)
) has wired TV (CATV) information, etc. in the mixer (17
a) and supplied via cable (18);
The audio information (16) and video information (15) centrally arranged in the master room (2) are mixed with a mixer (17a).
and multiple subrooms (20) via the distributor (17b)
(21) (22) (23) to select the remote control (1) as appropriate.
Cable (1) so that you can watch from 4a) to (14c)
9) is distributed by the wiring.

Each room (20) (21) (22) is provided with a multi-link receiver (25) (26) (27),
The multi-link receiver (25) has left and right speakers (28
L) (28R) is arranged, and in the room (20), for example, audio information (16
), and in room (21) there is a multi-link receiver (26) and left and right speakers (29L) (29R).
) and a TV receiver (30), for example, a VTR
The video information (15) from the remote control (14b) etc.
) can be viewed. In the room (22), for example, D A T (
6), etc., to the multi-link receiver (27) and the left and right speakers (30L) (30R).
) can be listened to. In the room (23), a TV receiver (31) is installed so that, for example, CATV can be viewed, and each subroom can select an appropriate source from source sources (4) to (9). has been made.

Multi-link center (in the master room (2) mentioned above)
To describe in more detail the exchange of data and commands between 3) and various electronic devices (4) to (9), in the master room (2), TV and CATν information from the mixer (17a) and information from each subroom are transmitted. The control signal is supplied to a two-way divider (32). 2 distributor (32) is for CATV, TV, F
It supplies the RF multiplied signal to a three-way distributor (33) such as M, and distributes the remote control control signal to a multi-link center (3). The multi-link center (3) and various electronic devices (4) to (9) serving as sources are connected in series by a control line (34). Audio information (16) and video information (1
5) (hereinafter referred to as AV information) is the A/V line (35)
The AV information is supplied in parallel to the multi-link center (3) via the multi-link center (3) → 2-distributor (32) → cable (1B) - mixer (17a) - distributor (17b) →Multi-link receiver (25) in each subroom (20) to (23) along the route of cable (19)
) to (27).

For example, the RF multiplied signal (33) of CATV etc. distributed by the 2-divider (32) in the master room (2),
CATV (7) TV RF double signal tuner (7) of TV receiver (13) FM RF double signal VTR(
9) is distributed to the RF multiplied signal for TV.

In such an MLS, there is a multilink center (3) and multilink receivers (2) in each subroom (20) to (22).
5) Remote control (14a) between (26) and (27)
The remote control signal supplied from (14c) is 5IRCS, which is currently used by the applicant.
ntrol System) is used. This 5
The IRCS system is an infrared digital code remote control format, and the code format is shown in FIG. This format usually consists of 15 bits (or 12 bits), and includes a guide pulse (36) as an identification signal that defines the start, and a 2° pulse following this guide pulse.
A data code (37) that uses a 15-bit (or 12-bit) binary code starting with 7 bits to represent a control function.
The 8 bits (or 5 bits) after this code represent the product category.The product code (38) represents one frame (
45ms). This product code (38) indicates the type of source (4) to (9), and the data code indicates the power on/off status, etc. Using the control signal for 5IRC5, When viewing information in each subroom (20) to (23) from a predetermined source, the remote control (1) of each subroom (20) to (23)
From 4a) to (14c), multi-link center (3)
For example, if a request is made for AV information from a CD player (4), a laser disc player (9), a DAT deck (6), and a VTR (8), the multilink center (3) S I RCS from remote control
The signals are organized and sent out in series, for example, in the order of CD information, LD information, DAT information, and VTR information.

In this way, multiple sub-subrooms (20) (21)
Audio information (16) or video information (15) requested from the multi-link center (3) side can be sent to each room in response to commands of 5IRSC control signals from (22) .

Such audio information (16) and video information (15)
), independent channels are assigned to each source of various electronic devices (4) to (9) and frequency multiplexed via one cable (18).

Frequency allocation of such frequency-multiplexed data will be explained with reference to FIG.

In Figure 8, (40) is an FM CATV (7), for example,
45MHz to 370 from 2 channels to 50 channels
This is the MHz band. The AV information used for MLS is this C
Located above and below the ATV band. That is, video information (1
5) is analog and AM+FM modulated, and for example, 415.25 MHz and 427.25 MHz, whose center frequencies are 12 M apart, are selected as the sixth and seventh channels on the high frequency side of the CATV band. Audio information (1
6) is digitized and the two-phase phase change tel (2P S
K: phaseshift keying)
It is placed on the low-frequency side of the CATV band. For example, the center frequencies of the first to fifth channels are 3 MHz.
Separate bands of 22.5 MHz to 34.5 MHz are selected and assigned to data transmission channels CH, -CH of various electronic devices (4) to (9) explained in FIG. Furthermore, the first remote control signal (41) and the second remote control signal (42) for remote control control are subjected to digital frequency modulation (
FSK: frequency shift key
ing), and the carrier wave of the first remote control signal (41) is selected to be, for example, 16.5 MHz, and the carrier wave of the second remote control signal (42) is selected to be, for example, 17.5 MHz. These remote control signals are time-domain multiplex modulated. This first remote control signal (41) is used for control from the master room (2) side to each room (20) to (23), and the second remote control signal (42) is used for controlling the remote control (14a) of each room.
- (14c) are used to control the multi-link center (3) side of the master room (2).

[Problem to be solved by the invention]

As detailed in the conventional configuration above, the master room (2)
A plurality of various electronic devices (4) to (9) which are sources connected to the multi-ring center (3) on the side are connected to each sub-room (20) to (23) via the multi-ring center (3).
) are supplied to multi-ring receivers (25) to (27).

The audio information (16) is, for example, a CD player (4).
outputs EFM-modulated digital data directly to the cables (18) and (19), while the tape deck (5
), tuner (7), etc., output analog audio information. This audio information is converted into digital data via an analog-to-digital conversion circuit (hereinafter referred to as A/D) and transmitted via cables (18) and (19). In general, the output level of audio information extracted as an analog signal differs depending on the electronic device, and with FM tuners (7) etc., it changes to 100% and goes to zero after 8 cycles.
．． For a 775V cassette deck (5), it is about 0.5V, and when these input signals are A/Ded, a large amount of overhead margin must be taken. On the other hand, since the digital data output level from the CD player (4) is recorded to about 2cm, which is close to the peak level, this EFM-modulated digital data is directly transmitted to the subrooms (20) to (23). When demodulated, the output level is extremely high compared to the audio information (16) extracted as an analog signal.Also, an analog signal is output.There are also output level differences among various electronic devices, and the level can be adjusted depending on the selection of the device. There was a problem in that adjustments had to be made each time according to the output level of the source.

The present invention has been made to solve the above-mentioned problems, and its purpose is to automatically adjust the level of the audio output signal according to the different levels of the audio output signal from the source. The present invention is designed to provide a receiving device that can perform the following functions.

[Means to solve the problem]

An example of the receiving device of the present invention is a master room where source sources consisting of a plurality of various electronic devices (4) to (9) are arranged centrally, as shown in FIGS. 1 and 6. (2)
In a receiving device, data from a source is transmitted from a source to receiving means (25) to (27) arranged in subrooms (20) to (23) via cables (18) and (19). , a plurality of electronic devices (4) to (9). The difference in the output levels of (9) to (9) is corrected by a level variable means (78).

[Effect]

According to the receiving device of the present invention, one of the plurality of electronic devices (4) to (9) serving as a source is a remote control (14a) to (1).
4c), the level variable means (78) is automatically adjusted to a predetermined level based on the source information from the mask room (2) side according to the selected output, so the remote control selection This eliminates the need to manually adjust the levels each time you select a variety of equipment.

〔Example〕

Hereinafter, an application of the receiving device of the present invention to MLS will be described.

Before explaining the MLS receiving apparatus of the present invention with reference to FIGS. 1 to 3, we will explain the above-mentioned video information (15) and audio information as well as the first and second remote control signals (41) and (4).
2) will be explained with reference to FIGS. 4 and 5.

Figure 4 shows the formats of the first and second remote control signals. Figure 4A is the first remote control signal (41), and there is 128 bytes of data for every 100m5, and this data is The synchronization signal (41a) then sends the data transmission room number, the transmission/reception permission flag of each room, and the fifth
As shown in the figure, for example, the channel contents (41c) etc. are stored in each subroom (20) to 21 bytes between 16 bytes and 21 bytes.
(22) is sent to multilink receivers (25) to (27). Channel contents (41C) are, for example, as shown in Figure 5, 16th height ON = unused, IH: V
0, -F□ are determined in correspondence with TR, . . . . Figure 4B shows the format of the second remote control signal (42), which shows 1024 signals within 100 m5.
Bit data is control data from the 1st room to the 16th room (42a) (42b)... (42p)
sent as. The data for each room is 64-bit data as shown in Figure 4C, starting with a synchronization signal (42a'),
12 to 15 bit data (42 bits) of the 5IRCS mentioned above
c'), other security status data (4
2d') and CRC (42e'), and the time axis is compressed.

Figure 1 shows the MLS subroom (20) explained in Figure 6.
~ (23) side multilink receiver (25) ~ (27)
), corresponding parts to those in FIG. 6 are given the same reference numerals, and redundant explanation will be omitted.

In Figure 1, digital data from each source is supplied from the distributor (17b) to the input terminals (62) of the multilink receivers (25) to (27) in the subrooms (20) to (23), and the PSK demodulation circuit (74) and EFM (εight
The digital data is demodulated and decoded via a fourteen modulation decoder (75), converted into an analog signal by a D/A (71), and outputted via level variable means such as a control amplifier or a variable resistor. It is supplied from the power amplifier to the speaker via the terminal (50).

The first remote control signal (
41) Channel contents shown in Figure 4 (4
The data transmitted from the master room (2) side such as 1c) to the multilink receivers (25) to (27) is extracted and supplied to a microcomputer (hereinafter referred to as μmC0N) (81). μmCON (81) reads control output data predetermined according to the output signal levels of various electronic devices (4) to (9) from a memory (64) such as ROM or RAM, and outputs the control output data to D/A (63). The signal is converted into an analog signal and the level variable means (78) is controlled. In the case of Figure 1, the gain of the control amplifier is varied and the output terminal (50
) is shown.

Figure 2 shows the CD player (4), DAT player (6), FM tuner (7), and cassette deck (
5) shows an example of the output level. For CD and DAT players (4) and (6), their maximum output voltage L/HeJL/ is 10 dB (OdB=0.775V
) Close to 2. On the other hand, in the case of the cassette bouquet (4), the maximum output voltage level is about -5 dB. Furthermore, FM tuner (
In 3), the maximum output voltage level is OdB. In this way, since the analog and digital output levels of the electronic devices (4) to (9) that are source sources are determined by each electronic device (4) to (9), the output terminals are (50) stores a value at which the passing voltage level reaches a predetermined receiving level (for example, -10 dB) in memory (64).
) and store this preset value in D/A (
63), a predetermined DC control signal is supplied from the D/A (63) to the control amplifier (11), which is a level variable means, and the source sources (4) to (9)
A predetermined level of voltage according to the output of the output terminal (
50) to emit an audio signal from a speaker at a predetermined level.

According to this example, electronic devices (4) to (9) that are sources
It is possible to automatically output a control level corresponding to the output level of.

FIG. 3 shows multilink receivers (25) to (27) arranged in subrooms (20) to (23) of the present invention.
This shows a more specific configuration, and in this embodiment, an electronic volume is used as the level variable means.

In Figure 3, (62) is an antenna terminal connected to a coaxial cable (19), and a CATV, broadcast TV signal or VTR (8) supplied to this antenna terminal (62).
Video signals from etc. are distributed by a distributor (71) to a TV receiver circuit (70) having the same configuration as a normal TV receiver.
The video signal is displayed on a CRT, etc., and then displayed on a TV.
The audio signal is sent to speakers (28L) to (31L), (28R) via switch SW and power amplifier (83).
Sound is emitted from ~(31R). Also, the master room (2
) Audio information (1) from the CD player (4) etc.
6) is the antenna terminal (6) from the coaxial cable (19).
2) through distributor (71) → distributor (72) → PSK
The signal is demodulated through the demodulation circuit (74) → EFM decoder (75) → digital filter (76). These PSK demodulation circuits (74) are controlled by μmCON (81) using various signals as shown in the figure. The audio information (16) after passing through the digital filter (76) is D/A (77
L) is converted into an analog signal via (77R), is supplied to the power amplifier (83) via the electronic volume (78), and is sent to the speakers (28L) to (31L), (28
R) to (31R).

Furthermore, the master room (2) distributed by the distributor (72)
) side to the subrooms (20) to (23) as well as the first remote control signal (41) and the subrooms (20) to (23).
The second Moricon signal (42) transmitted from the (23) side to the master room (2) side is sent to the 5IRCS decoder (7
9) and an S I RCS encoder (80) for time axis compression. These decoders (79) and encoders (80) are μmCON
(81) controls the remote control signal (4) between the master room (2) and each sub-room (20) to (23).
1) and (42) are exchanged. The operation unit (54), which is a panel embedded in the wall of each sub-room (20) to (23) provided as necessary, has a microcomputer (85) and a drive circuit (87) for an LED indicating the volume. ,
5 A sensor (84) that receives IRCS signals, etc., as shown in the figure, a group of operation keys (88) such as CD and TAPE for operating various devices in the master room (2), and a multi-link receiver (25). ) to (27) are MIDI (Mus
ical Instrument Digital I
interface) cable (89).

Further, the preset values output according to the output levels of the electronic devices (4) to (9) that are the sources stored in the memory (64) are determined by the channel contents O to μmCON (81) shown in FIG. 11, outputs a preset value for the contents of the corresponding channel, and automatically adjusts the electronic volume (78) using a motor or the like after D/A.

〔Effect of the invention〕

According to the present invention, it is possible to obtain a receiving device that does not require adjusting each time the difference in analog signal level caused by the source device connected to the receiving device after selecting the device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the receiving device of the present invention, Fig. 2 is a level comparison diagram of various devices, Fig. 3 is a system diagram of the multi-ring receiver of the present invention, and Fig. 4 is a diagram of the remote control signal. Figure 5 is a diagram showing the definition of the byte data of the first remote control signal, Figure 6 is a configuration diagram of the conventional MLS, Figure 7 is an explanatory diagram of the digital remote control format, and Figure 8 is the conventional FIG. 2 is a diagram showing frequency allocation of MLS of FIG. (1) is a house, (3) is a multi-link center, (4) is a CD player, (5) is a deck, (6) is a DAT, (7) is a
) is a tuner, (8) is a VTR, (9) is a CD player, (10) is a main amplifier, (20) to (23) are sub rooms, (25) to (27) are multilink receivers,
(74) is a PSK circuit, (75) is an EFM, and (7B) is a level variable means.

Claims (1)

[Claims] In a receiving device that transmits data from a source source consisting of a plurality of various electronic devices from a master room where the source source is centrally arranged to a receiving means arranged in a sub room via a cable, It has a level variable means that responds to the output levels of the plurality of electronic devices, and the level variable means corrects differences in the output levels of the plurality of electronic devices according to source information from the master room side. A receiving device characterized by comprising: