JP2893863B2 - Transmission equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a transmission device suitable for use in a home bus system or the like.

[Summary of the Invention]

The present invention relates to a transmission device suitable for use in a home bus system or the like, in which a plurality of electronic devices and a control device to which the plurality of electronic devices are connected are provided in a master room, and a plurality of control devices provided in the master room are provided. In a transmission apparatus in which the reception apparatuses arranged in the sub-rooms are connected by one transmission path, frequency-multiplexed output signals from a plurality of electronic devices are transmitted through one transmission path, the control device is Receiving means for receiving a request command transmitted from each sub-room,
A channel allocating means for automatically allocating a channel corresponding to a band frequency of an output signal to be transmitted based on a plurality of request commands received by the receiving means, and an electronic device allocated to each channel by the channel allocating means By transmitting the identification information and the channel information in association with each other and by providing transmission means for transmitting control information of each electronic device, a channel having a frequency band corresponding to a signal to be transmitted is automatically selected and , Data from various sources is transmitted in a narrow band.

[Conventional technology]

2. Description of the Related Art Recently, a home bus system that performs various controls in a home by connecting various electronic devices such as a personal computer, a lighting control terminal, and a gas leak detecting unit with a transmission cable has been put to practical use. Further, the present applicant has proposed a multi-link system (hereinafter referred to as MLS) which can distribute audio and video information from one place to each room in the home by wire and can appropriately view the information. This MLS is configured as shown in FIG.

In the figure, for example, a basement or a reception room among a plurality of rooms in a house (1) is a master room (2), and a multi-link center (3) such as a multi-preamplifier is provided in the master room (2). A plurality of devices driven by the multilink center (3), for example, a CD player (4), a tape cassette deck (5), a DAT deck (6), an AM / FM tuner (7), a VTR (8), A laser disk player (9), a main amplifier (10) including left and right speakers (12L) and (12R), a TV receiver (13), etc., are centrally arranged, and a remote controller (hereinafter referred to as a remote controller) is installed in the master room (2). (14) and the like, the user can view favorite audio information (16) and video information (15) in the plurality of devices. The multi-link center (3) in this master room (2) has a cable TV
(CATV) information and the like are supplied via a mixer (17a) and a cable (18), and audio information (16) and video information (1) centrally arranged in a master room (2).
5) The cable (5) can be watched by the remote control (14a) to (14c) through the mixer (17a) and the distributor (17b) in a plurality of sub-rooms (20) (21) (22) (23) as appropriate. 19)
Distribution. Each sub room (20)
(21) (22) Multilink receiver (25) (26)
(27) is provided, left and right speakers (28L) and (28R) are arranged in the multilink receiver (25), and the sub room (2
In (0), for example, audio information (16) from a CD player (4) or the like is listened to. In the sub room (21), a multi-receiver (26), left and right speakers (29L) (29R), and a TV
A receiver (30) is provided, and video information (15) from, for example, a VTR (9) can be viewed by operating a remote controller (14b). In the sub room (22), by operating the remote controller (14c), for example, audio information (1
5) Multilink receiver (27) and left and right speakers (3
0L) (30R). In the sub room (23), a TV receiver (31) is provided so that, for example, CATV can be viewed.

The transmission and reception of data and commands between the multilink center (3) in the master room (2) and the various electronic devices (4) to (10) will be described in more detail.
Inside, the TV and CATV information from the mixer (17a) and the control signal from each room are supplied to a two distributor (32). The two-way divider (32) supplies RF signals such as CATV, TV, FM, etc. to the three-way divider (33), as well as audio information (16) and video information (15).
In addition, the remote control signal is distributed to the multilink center (3). The multilink center (3) and various electronic devices (4) to (9) as source sources are connected in series by a control line (34). AV information is A /
AV information is supplied in parallel to the multilink center (3) via the V line (35), and the AV information is supplied from the multilink center (3) → two distributor (32) → cable (18) → mixer (17)
a) → Distributor (17b) → Multilink receiver (25) in each subroom (20) to (23) in the route of cable (19)
(27).

RF signals such as CATV distributed by the two dividers (32) in the master room (2) are divided by the three dividers (33) into, for example, CATV signals.
It is distributed to a TV RF signal of the TV receiver (13), an FM RF signal of the tuner (7), a TV RF signal of the VTR (8), and the like.

[Problems to be solved by the invention]

Multilink center (3)
And multi-link receivers in each room (25) (26) (27)
The remote control signals supplied from the remote controllers (14a) to (14c) between the SI
RCS: Sarks (Sony Infrared Remote Control Syste
m) is used. This SIRCS is an infrared digital code type remote control format, and FIG. 6 shows the code format. This format is usually composed of 15 bits (or 12 bits), and uses a guide pulse as an identification signal for defining the start and a 15-bit (or 12-bit) binary code starting from 2 ° following this guide pulse. Data code representing control function in bits (37)
And a frame (45) with a product code (38) representing a product category by 8 bits (or 5 bits) after this code.
ms). Using such a control signal for SIRCS, when viewing information in each of the sub-rooms (20) to (23) from a predetermined source in the master room (2), each of the sub-rooms (20) to (23) For example, remote controllers (14a) to (14c) request the multilink center (3) for AV information from a CD player (4), a laser disk player (9), a DAT deck (6) and a VTR (8). For example, in the multilink center (3), the SIRCS signals from these remote controllers are arranged and serially transmitted, for example, in the order of CD information, LD information, DAT information, and VTR information. As shown in FIG. 6, one frame of such an SIRSC control signal is 45 ms, but two or more coincidences are observed in order to increase the reliability.

In this way, multiple sub-rooms (20) (21) (22) ‥
Audio information (16) requested by the multilink center (3) in response to the SIRSC control signal command from (4)
Alternatively, the video information (15) can be transmitted to the sub-rooms (20) to (23) almost simultaneously. Such audio information (16) and video information (15) are used for various electronic devices (4).
An independent channel is assigned to each of the sources (9) to (9) and frequency-multiplexed via one cable (18).

The frequency allocation of such frequency-multiplexed data will be described with reference to FIG.

In FIG. 7, (40) indicates a band of 45 MHz to 370 MHz in, for example, 2 to 50 channels of the CATV which has been FM. AV information used for MLS of this example is arranged above and below this CATV band. That is, the video information (15) is analog and AM + FM
415.25M which is modulated and has a center frequency of 12M away as the sixth channel and the seventh channel, for example, on the high frequency side of the CATV band.
Hz and 427.25MHz are selected. The audio information (16) is digitized and converted to two-phase shift keying (2PSK: phase shift key).
ing) and arranged on the lower side of the CATV band. For example, the first
The center frequency is 3M for each channel from channel 5
And band Hz apart 22.5MHz~34.5MHz are selected, assigned to the data transmission channel CH ₁ to CH ₇ of various electronic apparatus described in FIG. 5 (4) - (9). Further, the first remote control signal (41) and the second remote control signal (42) for remote control control are digital frequency modulation (FSK).
That is, the carrier of the first remote control signal (41) is selected to be, for example, 16.5 MHz, and the carrier of the second remote control signal (42) is selected to be, for example, 17.5 MHz. These remote control signals are time axis multiplex modulated. The first remote control signal (41) is used for control from the master room (2) side to each of the rooms (20) to (23), and the second remote control signal (42) is used for the remote control (14a) of each room. (14c) is used to control the master room (2) to the multilink center (3).

Above various electronic apparatuses is disposed in the master room 2 side as in (4) to the channel CH ₁ of the transmission data increases example 7 shown from (9) is a CD player, a channel CH ₂ deck , Channel CH ₃ for DAT, channel CH ₄ for tuner AM, channel CH ₅ for tuner FM
Channel CH ₆ is for VTR, channel CH ₇ is for LD, etc., and as the number of devices to be transmitted increases, more channels are required independently, and audio information (16) and video information (15) are transmitted. Requires a lot of bandwidth to do so. It is necessary to select these bands so that they do not overlap the frequency bands of radio broadcasting such as AM and FM, television broadcasting, police radio, etc. transmitted in each country. There is a request to transmit.

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned requirements, and has an object to respond to a transmission data information request in an electronic device in a master room (2) used by a plurality of users. The transmission / reception of data is performed within a limited band without changing the number of channels by changing channels of transmission data corresponding to a plurality of electronic devices within a predetermined limited channel.

[Means for solving the problem]

The transmission apparatus of the present invention has a plurality of electronic devices (4) (5) (7) (8) as shown in FIGS.
(9) (46) (47) (48) and a control device (4) (5) (7) (8) (9) (46) (47) (48) 3) is provided in the master room (2), and the control device (3) provided in the master room (2) and the receiving devices (25) to (25) provided in the plurality of sub-rooms (20) to (23) are provided. 27) (31) are connected by one transmission line (19), and a plurality of electronic devices (4) (5) (7) (8)
(9) In a transmission device for frequency-multiplexing an output signal from (46), (47), and (48) and transmitting the multiplexed signal via one transmission line (19), the control device (3) includes a sub-room (20) ~ (2
The receiving means (6) that receives the request command transmitted from (3)
0), a channel allocating means (61) for automatically allocating a channel corresponding to a band frequency of an output signal to be transmitted based on a plurality of request commands received by the receiving means (60), Electronic devices (4) (5) (7) assigned to each channel in (61)
(8) (9) (46) (47) (48) In addition to transmitting the identification information and the channel information in association with each other, each electronic device (4) (5) (7) (8) (9) (46) (47) Transmission means for transmitting the control information of (48).

[Action]

The transmission apparatus of the present invention performs transmission by changing the channel in accordance with a data transmission request requested by the user from the sub-room side within a channel of a predetermined limited band, and at this time, transmits source information to the sub-room side together with channel information. Is transmitted, so that a transmission device that does not occupy a large band even if the number of transmission data to be transmitted increases is obtained.

〔Example〕

Hereinafter, a case where the transmission device of the present invention is applied to an MLS will be described.

Before explaining the transmission apparatus for MLS of the present invention with reference to FIGS. 1 and 2, first and second remote control signals (41) and (42) as well as the video information (15) and the audio information described above will be described. This will be described with reference to FIGS. 3 and 4.

FIG. 3 shows the format of the first and second remote control signals, and FIG. 3A shows the first remote control signal (41), which has 128 bytes of data every 100 ms. The synchronization signal (41a) then transmits the data transmission room number, the transmission / reception permission flag of each room, and the contents of the channel (41c) between 16 bytes and 21 bytes as shown in FIG. ) To (22) are transmitted to the multilink receivers (25) to (27). The channel content (41c) is, for example, as shown in FIG.
0 _H: Unused, 1 _H: VTR, in correspondence as the ‥‥ such, the value of 0 _H to E _H for also equipment used source will be described later playback request from Saburumu (20) - (23) side It is made to change according to. FIG. 3B shows the format of the second remote control signal (42), in which 1024 bits of data are stored in the control data (42a) (42b) from the first room to the sixteenth room in 100 ms. (42p). As shown in FIG. 4C, the data for each room is 64-bit data, and first, the synchronization signal (42a ') and the priority data (42a).
b ′), the SIRCS 12 to 15 bit data (42
c '), other security status data (42
d ') In addition, it is composed of CRC (42e') and is compressed on the time axis.

FIG. 1 shows the configuration of the multilink center (3) on the master room (2) side of the MLS described in FIG. 5, and the same parts as those in FIG. Is omitted.

The output signals from the various electronic devices that are centrally located in the master room (2) to the input terminal T ₁ to T ₉ Multilink center (3) of Figure 1 are inputted. That is, these various electronic devices include, for example, a CD player (CD ₁ ) (4), a CD ₁
(4) Digital outputs digital - CD player that the analog signal through analog converter (D / A) (45) (4), deck such as a tape recorder (DECK ₁₎ (5),
Tuner (7), an analog player (PS) (46), the autochanger for CD (CD ₂₎ (47), the autochanger deck tape cassette (DECK ₂₎ (48), VTR
(8) Analog or digital audio information (16) from the LD (9) or the like is supplied. VTR (8), LD
(9) video signal V is supplied to the input terminal T _10, T ₁₁ from. Supplied to the input terminal T _1, the terminal T ₁₂ via a CD player digital data EFM and PSK circuit of the (4) (51) with modulation made mixer (58) and the mixing distributor (60)
Is output to The output of the terminal T ₁₂ is the distributor shown in FIG. 5 (1
It is distributed to sub-rooms (20) to (23) via 7b).
Output signals from the DECK ₁ (5), the tuner (7), the PS (46), and the CD ₂ (47) supplied to the input terminals T _{3 to} T ₆ are supplied to the first switch S ₁ of the switching means (50). the fixed contact a ₁ ~d ₁
Supplied to Note the output of PS (46) is supplied to the fixed contact c ₁ via the preamplifier (49) or the like. Signal supplied through the first movable contact of the switch S ₁ the analog - digital converter (A / D) (52) in digitized by EFM, is modulated via the PSK circuit (54), mixed Predetermined data transmission is performed to the sub room via the mixer (58) and the mixer / distributor (60). Similarly to the fixed contact a ₂ to d ₂ of the second switch S ₂ of the switching means (50) tuner (7), PS (46),
CD ₂ (47), the deck (DECK ₂₎ is supplied the output signal from the (48), the signal supplied via the second movable contact of the switch S ₂ is converted into digital data by A / D (53) EFM, PSK
Modulated by the circuit (55), mixer (58) and the mixing distributor (60) each from the terminal T ₁₂ via a Saburumu (20) - (2
Audio information (16) is distributed to (3).

The third switch S ₃ fixed contacts a~h switching means (50) for example, CD ₁ (4) the output data of the D / A (4
Analog signal converted in 5), DECK ₁ (5), tuner (7), PS (46), CD ₂ (47), DECK ₂ (48), VTR
(8), is supplied LD audio information from (9) (16), is output to the output terminal T ₁₅ via the movable contact, the audio information of various electronic devices in the master room (2) (16) Output for listening. Although not shown in FIG. 1, switches and the like for recording audio information from these sources are provided in the master room (2). Fourth switch of switching means (50)
S ₄ is a switch for selecting switching the video signal of VTR (8) and LD (9), the movable contact of the fourth switch S ₄ the terminal T
₁₆ and used to monitor video signals in the master room (2). VTR (8) and LD (9)
The video signal V and the audio signal A from being supplied to the input terminal T ₈ through T ₁₁ Multilink center (3), third and fourth
The switches S ₃ and each AM-FM modulation circuit (56) while being branched into S ₄ and are supplied to the (57) modulation, the terminal T ₁₂ via a mixer (59) and the mixing distributor (60) And the video and audio signals are distributed to the sub-rooms (20) to (23). The switching means (50) is controlled by a remote control decoder (61). In addition, each sub room (20) ~
The second remote control signal from (23) (42) is supplied to a remote control decoder (61) via the terminal T ₁₂ and the mixing distributor (60). Control lines from the terminal T ₁₃ (34) (FIG. 5 reference) Master room (2) via the CD ₁ in (4), DEC
It is supplied as SIRCS signal to various electronic devices such as K ₁ (5). T ₁₄ is a terminal for receiving a command (SIRCS) emitted by the remote control (14) in the master room (2), the decoded output is connected to the control system such as a CPU (not shown) the control signal of the remote control decoder (61) Exchanges have been made. Further, the status (63) of the first remote control signal (41) transmitted from the master room (2) side to each of the sub-rooms (20) to (23) is supplied from the control system, and is supplied by the reference clock generator (62) with a predetermined clock. Generate and mix through each sub-room (20) via distributor (60)
To (23).

The operation of this example in the transmission apparatus as described above will be described. First, the sub-rooms (20), (21), and (22) shown in FIG.
A remote control decoder (61) via the terminal T ₁₂ and the multilink center (3) mixing distributor in the (60) from CD ₁ (4)
This regeneration, regeneration of DECK ₁ (5), when the reproduction request command of the tuner (7) in parallel to the sent through the remote controller (14a) ~ (14c), remote control decoder (61) to the control system sends a command, the assignment of channels, for the conventional configuration which has been determined is assigned a frequency band of the channel CH ₁ to CH ₇ according to the device to be reproduced as described in FIG. 7, shown in Figure 1 In this case, a frequency band of 7 channels is required, but in this example, the number of channels which are considered to be capable of simultaneously generating a reproduction request command, for example, 4CH is fixedly provided, that is, as shown in FIG. In addition, audio information (16) and video information (1
Placing the processing of 5) by a channel CH ₁ to CH ₄ fixed set to a predetermined band frequency range, and a command request order, or Saburumu (20) to (23) sequentially channels such as in ascending order the room number of For example, there is a request to play the CD ₁ player (4) from the sub room (20),
Next, assuming that a playback request command for DECK ₁ is received from the sub room (22), the control system determines that the sub room (21) = CD ₁ (4) = CH ₁ sub room (22) = DECK ₁ (5) = CH ₂ Make channel assignments. When such channel assignment is determined, the control system sends the first remote control signal (41) shown in FIG. 3A from the master room (2) to the sub rooms (20) to (23). Of the channel information (41c) included in the master information of. Each sub-room (2
Multilink receivers (0) to (22) (25) to (27)
Is a predetermined frequency of CH ₁ to CH 2 as shown in FIG. ₂ , 22.5
Automatically tune the receiver frequency to 25.5 MHz and 25.5 MHz. At the same time, CD from the control system and remote control decoder (61)
₁ (4), SIRSC signal is output to DECK ₁ (5), and these electronic devices are activated via the control line (34),
With simultaneous remote control decoder (61) and or via a control system controls the switches S ₁ of the switching means (50), take out the output of the CD (4), the first switch
The audio information (1) reproduced by the CD ₁ player (4) and the DECK ₁ (5) by switching the movable contact of S ₁ to the fixed contact a.
6) is transmitted to sub-rooms (20) and (22).

Next, the control system and the remote control decoder (61) of DECK ₁ when the reproduction stop request command (5) is sent master room (2) side from Saburumu (22) empties the channel CH _2. That is, as shown in FIG. 4, the channel content of the predetermined byte is " _0H ". Further, when a reproduction command of the tuner (7) is transmitted from the sub room (21), the control system or the remote control decoder (61) sets the channel CH ₂ to a channel for reproduction of the tuner (7) of the sub room (21). assignment CH ₁ = CD ₁ (4) of the reproduction CH ₂ = transmit the status of the channel assignment is changed and at the same time the reproduction of the tuner (7) is changed from the master room 2 side to Saburumu (21) side the control for switching the second movable contact piece of the switch S ₂ of the switching means (50) to the fixed contact a ₂ from a tuner (7) Saburumu (21) by the control system through a remote control decoder (61) is controlled at the same time And the audio information of the tuner (7) can be heard in the sub room (21).

In the above example, an example of switching between two channels has been described. However, if channel frequencies of four channels are allocated, for example, transmission from four sound sources is possible at the same time, and depending on the number of rooms, there is a request for simultaneous reproduction temporally. Considering the utilization factor, a transmission device that does not need to allocate channels over a wide frequency band for each source of each electronic device can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention, such as application to a home bus system.

〔The invention's effect〕

According to the transmission apparatus of the present invention, when a plurality of users issue an AV information transmission request command at the same time, when a command overlaps, the frequency allocation band is reduced by
What can transmit information is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the transmission device of the present invention, FIG. 2 is a diagram showing a frequency allocation of the present invention, FIG. 3 is a diagram showing a format of a remote control signal, and FIG.
FIG. 5 is a diagram showing the configuration of a conventional MLS, FIG. 6 is an explanatory diagram of a digital remote control format, and FIG. 7 is a diagram showing the frequency allocation of the conventional MLS. (1) House, (3) Multilink center, (4)
CD player, (5) deck, (6) DAT, (7) tuner, (8) VTR, (9) CD player, (10)
Is the main amplifier, (20) to (23) are sub rooms, (25)
~ (27) is a multilink receiver, (54) and (55) are
EFM and PSK circuits, (58) and (59) are mixers, and (61) is a remote control decoder.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-109696 (JP, A) JP-A-61-157038 (JP, A) JP-A-1-236894 (JP, A) 143363 (JP, U)

Claims (1)

(57) [Claims] 1. A master room comprising a plurality of electronic devices and a control device to which the plurality of electronic devices are connected, and a control device provided in the master room and a receiving device provided in a plurality of sub-rooms. Are connected by a single transmission line, and output signals from the plurality of electronic devices are frequency-multiplexed and transmitted through the one transmission line. Receiving means for receiving a request command to be transmitted, channel assigning means for automatically assigning a channel corresponding to a band frequency of an output signal to be transmitted based on the plurality of request commands received by the receiving means, Means for transmitting the identification information of the electronic device assigned to each channel and the channel information in association with each other, and transmitting the control information of each electronic device. A transmission device comprising transmission means.