JP2840313B2 - TV intercom equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention arranges a television camera on the side of an intercom slave unit provided at an entrance such as an entrance or a gate, and outputs the imaging output to an indoor master unit side. The present invention relates to a television intercom apparatus that confirms a visitor by projecting an image on a provided receiver.

(B) Conventional technology Conventionally, in a TV intercom, for example,
As shown in -271581 (H04N7 / 18), in order to confirm a visitor during absence, image information captured by a television camera provided on the intercom slave unit is provided on the interphone slave unit side. Some are recorded in a semiconductor storage device provided in the intercom master unit in association with the operation of the call switch.

(C) Problems to be Solved by the Invention However, in the conventional TV intercom apparatus, the semiconductor storage device is connected to the semiconductor storage device regardless of whether the user is at home or away from home, that is, regardless of whether a call is made between the master unit and the slave unit of the intercom. Image information is recorded.

However, the purpose of recording the image information is to confirm a visitor during absence. When the user is at home, a call is made between the master unit and the slave unit of the intercom, and the visitor is confirmed, image information that does not need to be recorded exists on the semiconductor storage device, and the usage efficiency of the semiconductor storage device Was bad.

(D) Means for Solving the Problems In order to solve the above problems, the present invention relates to a call switch provided on the intercom slave unit, which is provided with image information captured by a television camera provided on the intercom slave unit side. A television intercom device for sequentially recording in a recording area of a semiconductor memory device having a plurality of image information recording areas provided on an intercom master unit side in association with an operation, wherein after the recording is performed, a predetermined If the intercom master unit is operated within a period of time and a call with the intercom slave unit is enabled, a recording area of the image information recorded by the recording on the semiconductor storage device is set as a next recording area. Overwriting possible state.

(E) Operation According to the above configuration, at the time when a call is made between the master unit and the slave unit of the intercom, the recording area of the image information recorded immediately before on the semiconductor storage device is set as the next recording area. Overwriting is possible, and another image information is overwritten in the storage area in accordance with the subsequent operation.

(F) Embodiment Hereinafter, an embodiment of the television intercom apparatus of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a main unit of the television intercom, and (2) is its sub unit. A microphone (3) and a loudspeaker (4) are connected to a 5.5 MHz FM modulation circuit (6) and a 6.5 MHz FM demodulation circuit (7) via a hands-free circuit (5) on the master unit (1) side, respectively. I have. The hands-free circuit (5) responds to the magnitude of the audio input from the microphone (3) and the audio output to the speaker (4),
The signal line (8) is used as a transmission line, that is, an audio signal from the microphone (3) is transmitted to the slave unit (2) via the 5.5 MHz FM modulation circuit (6), or is used as a reception line, that is, the slave unit ( This is a well-known circuit for switching whether the audio signal from 2) is received by the speaker (4) via the 6.5 MHz FM demodulation circuit (7). (9) is a power supply circuit whose output is stabilized by a constant current circuit (10), and power is supplied to both the master unit (1) and the slave unit (2) via a signal line (8). A monitor circuit (11) demodulates an image signal having a band of 0 to 3 MHz from the slave unit (2), outputs the demodulated image signal to the monitor receiver (12), projects an image, and outputs a four-screen recording circuit (13). ) And record the image information. The four-screen recording circuit (13) is provided with an A / D converter, a semiconductor memory circuit having a storage capacity for four screens, and a D / A converter to enable recording and reproduction of image information of a still image. . (14) is a control microcomputer for controlling the whole device, which has a save switch (15), a talk / monitor switch (16), and a reproduction switch (17), and a slave unit (2) via a signal line (8). A control signal is also sent to the side.

Note that the save switch (15), the talk / monitor switch (16), and the playback switch (17) are valid switches only while they are pressed, and their valid states are not maintained mechanically or electrically. .

On the other hand, the handset (2) has a call switch (18), which activates a call circuit (19) and sends a control signal to the control microcomputer (14) in the base unit (1). Also,
A microphone (20), 6.5Hz FM modulation circuit (21), speaker (22), 5.5MHz FM demodulation circuit (23) are provided, and a lens (24), image sensor (25), iris circuit (26), video circuit (27) ), A television camera (28) is provided.

The signal line (8) transmits an audio signal, an image signal, and a control signal by frequency multiplexing, and also functions as a power supply line.

Next, the operation of this embodiment will be described using a flowchart. As shown in FIG. 2, first, in the standby state, it is detected whether the call switch (18) on the slave unit (2) or the talk / monitor switch (16) on the master unit (1) is pressed. Then, if the call switch (18) is pressed (steps 30 and 31), the process proceeds to the flowchart shown in FIG. 3 (step 30), and the three-second timer and the 30-second timer in the control microcomputer (14) are reset. Set (step 32), calculate the remaining number of sheets that can be stored (step 33), generate a chime sound through the speaker (4),
The monitor circuit (11) is operated to display the remaining storable number on the monitor receiver (12) together with image information as a moving image from the television camera (28). (Step 34). The remaining storable number will be described later. Thereafter, if the elapse of three seconds is detected by the three-second timer (step 35), the image signal from the television camera (28) is demodulated by the monitor circuit (11). One still image is recorded at a predetermined address a of the semiconductor memory device in the four-screen recording circuit (13) (step 36). And step 37
If the 30-second timer does not detect that 30 seconds have elapsed, the system waits for input of the talk / monitor switch (16) and the save switch (15) (steps 38 and 39). Step of detecting input of talk / monitor switch (16)
At 38, if the input of the talk / monitor switch (16) is detected, the control microcomputer (14)
A minute timer is set (step 41), and a circuit for voice transmission / reception centering on the hands-free circuit (5) is operated to enable two-way communication between the master unit (1) and the slave unit (2) ( Step 42). That is, in response to a call from the slave unit (2), a still image is automatically recorded for visitor confirmation, and thereafter, the master unit (1) is operated to enable a call.

In step 35, the lapse of 3 seconds is not detected,
When the talk / monitor switch (16) is pressed (step 40), the operation after step 41 is performed without recording a still image for visitor confirmation, and the call from the slave unit (2) is answered, It is possible to talk with (1).

On the other hand, if the input of the save switch (15) is detected in step 39, a still image is recorded at the address a as in step 36, and the fact that the storage mode is set is also recorded. Then, the recorded still image is displayed on the monitor receiver (12) for 3 seconds together with a display such as a sign indicating that the mode is the storage mode, and then returns to a moving image (step 43). Thereafter, the process returns to the previous stage of step 37. The storage mode is a mode recorded by the operation of the storage switch (15), and is distinguished from automatic recording by the recall switch (18) in step.

In step 37, if the elapse of 30 seconds is detected, it is confirmed whether or not the still image recorded at the address a is in the storage mode (step 44). The absence monitor LED (not shown) indicating that there was a customer during absence is blinked (step 45). Thereafter, an address other than the address a where a still image is to be recorded is set (step 46), and the process returns to the standby state (step 47).

On the other hand, after two-way communication is enabled in step 42, is the talk / monitor switch (16) pressed (step
48) Alternatively, if the 3-minute timer detects that 3 minutes have elapsed (step 49), the process proceeds to step 50. If not, the process proceeds to step 51, and the input of the storage switch (15) is detected. Steps 51 and 52 are for setting the storage mode by the storage switch (15), similarly to steps 39 and 43, respectively, and the description is omitted. After step 52, the process returns to the stage before step 48.

In step 50, similarly to step 44, it is confirmed whether or not the storage mode is set.
Then, an address other than the address a to be recorded next is set, and if not, the address a is set as the next address to be recorded in step 53, and the process returns to the standby state (step 47).

Next, the above-mentioned remaining storable number will be described. The capacity of the semiconductor memory device in the four-screen recording circuit (13) is for four screens. In the storage mode in steps 43 and 52, the address a is not set as the next address to be recorded as in step 46. Therefore, the description is omitted, but the still image is stored without being deleted unless the storage mode is canceled. The remaining savable number refers to the number of pages that are not in the save mode among the four screens. For example, if one screen is in the save mode, the other three screens can be saved, and the remaining savable number is 3. Therefore, the number of still images recorded by the automatic recording performed in step 36 is three, and the latest three people are recorded as confirmation of a visitor during absence.

In steps 43 and 52, the storage switch (15)
The address a at which the still image is recorded is not changed just by pressing. Therefore, the still image at the time when the save switch (15) is last pressed is saved.

Here, features of the present invention will be described together. In conjunction with the operation of the call switch (18) provided in the slave unit (2), a still image is automatically recorded on a four-screen recording circuit (13)
Is recorded at a predetermined address "a" of the semiconductor memory device (steps 30, 36). Within 30 seconds, the talk / monitor switch (16) of the master unit (1) is operated to enable two-way communication (steps 38 and 42), and the save switch (15) is not pressed, and the address a screen is displayed. If is not the save mode, the address a is set again as the next address to be recorded (steps 50 and 53), that is, the recording of the recorded still image on the semiconductor memory device in the four-screen recording circuit (13). The area is set as the next recording area and becomes overwritable.

Next, the case where the talk / monitor switch (16) is pressed in the standby state (FIG. 2, step 31) will be described. In that case, the flowchart proceeds to FIG.

In FIG. 4, first, the control microcomputer (1
The 3 minute timer in 4) is set (step 54), and the moving image from the television camera (28) is displayed on the monitor receiver (12) (step 55). Then, 3 minutes by the 3 minute timer
Minutes have elapsed or the talk / monitor switch (1
6) cyclically detecting whether the call switch (18) and the play switch (17) are pressed (steps 56 and 57,
58, 59). Then, when the elapse of 3 minutes is detected (step 56) or the talk / monitor switch (16) is pressed (step 57), the process returns to the standby state (step 60). If the call switch (18) is pressed, the flow proceeds to the flowchart shown in FIG. 3 (step 58). Playback switch (1
If 7) is pressed, the flow proceeds to the flowchart shown in FIG. 5 (step 59). FIG. 5 is a flowchart showing the operation when the reproduction switch (17) is pressed. First, the absence monitor LED blinked in step 45 in FIG.
Is turned off (step 61), and the newest screen among the still images recorded by the four-screen recording circuit (13) is reproduced and displayed on the monitor receiver (12). Then, the playback switch (1
If 7) is continuously pressed (step 63), then four still images are reproduced while sequentially switching between a new screen and a moving image from the television camera (28) (step 64). That is, if the reproduction switch (17) is kept pressed, four still images are sequentially reproduced going back in the past while displaying the moving image from the television camera (28) at the time of switching. Playback switch (1
If (7) is no longer pressed, the process returns to (D) in the flowchart shown in FIG. 4 (step 65).

As mentioned above, although one Example concerning this invention was described,
It is needless to say that the present invention is not limited to the embodiment and various applications are possible.

(G) Effects of the Invention According to the present invention, when the intercom master unit is operated to enable a call, the recording area on the semiconductor storage device of the still image recorded immediately before for confirming the absence of the customer is stored in the next time. Since it is set in the recording area and becomes overwritable and another still image is overwritten in the storage area according to the subsequent operation, unnecessary still images do not remain in the semiconductor storage device and the semiconductor memory device The storage device can be used effectively,
The effect is great.

[Brief description of the drawings]

1 is a circuit block diagram of an embodiment of the present invention, and FIGS. 2, 3, 4 and 5 are flowcharts showing the operation of the embodiment of the present invention. is there. (28)… TV camera, (12)… Monitor receiver, (1
8) Call switch, (13) 4-screen recording circuit, (1
6) Talk / monitor switch, (14) Control microcomputer

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Katsumi Shimazaki 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-1-195785 (JP, A) JP-A Sho 64-18387 (JP, A)

Claims (1)

(57) [Claims] An image information taken by a television camera provided on a side of an intercom slave unit is linked to an operation of a call switch provided on the side of the intercom slave unit, and a plurality of images provided on a side of the intercom master unit. In a television intercom apparatus for sequentially recording information in each recording area of a semiconductor storage device having an information recording area, the intercom master unit is operated within a predetermined time after the recording is performed, and a call with the intercom slave unit is performed. Wherein a recording area of the image information recorded by the recording on the semiconductor storage device is set as a next recording area to enable overwriting.