JPH03130900A - Remote monitoring device - Google Patents

Abstract

PURPOSE:To reduce communication charge by using a coarse encoding system of 64Kb/s normally, and using a fine encoding system of 1.5Mb/s only when necessary. CONSTITUTION:Normally, only a basic interface (2B+D) 7 of an ISDN 30 is used, picture information from two picture input parts 1 are encoded at the encoding part 2 of 64Kb/s, various sensor information are made as packets using two B-channels, and the information is transmitted to the supervision side using the between-users information of a D channel. When the necessity for a more detailed picture information develops from the supervision of the various sensor information or the picture information, the necessary input from the picture input part 1 is encoded at the encoding part 3 of the 1.5Mb/s by an instruction from the supervision side 20, an H11 channel is set between the supervision side 20 and the supervised side, and the picture information encoded by the encoding system of 1.5Mb/s is transmitted through the channel to the supervising side 20. Thus, by using a high quality moving image which can obtain precise information only when necessary, the communication charge can be reduced.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a remote monitoring device that sends image information and sensor information of a place to be monitored using ISDN, and uses them to monitor the location. [Prior Art] When transmitting images using a communication network, the relationship between quality (amount of information) and economic efficiency becomes a major issue. When focusing on economic efficiency, it is better to use coarse video or frame-drop video than to use detailed video with a large amount of information, as it allows the use of a line with less capacity, which can lead to lower communication charges. can. However, coarse moving images or frame-by-frame moving images have the disadvantage that they cannot convey rapid changes in the situation. In order to solve this drawback, high-quality moving images must be used. However, high-quality moving images contain a large amount of information, and monitoring equipment in particular requires a communication line to be connected at all times, resulting in high communication charges. [Problems to be Solved by the Invention] This invention reduces communication charges by transmitting normally low-quality moving images and using high-quality moving images that allow accurate information to be obtained only when necessary. An object of the present invention is to provide a remote monitoring device that can reduce the amount of noise. [Means for Solving the Problems] The remote monitoring device according to the present invention usually has a 64K b
/s image encoding method is used to transmit moving images using the ISDN B channel, and 1.5 Mb/s is transmitted only when necessary.
This is to transmit moving images using the s image encoding method using the ISDN H channel. [Operation] According to the present invention, only the ISDN basic interface (2B+D) is normally used. The image information input from the two image input units is encoded using a 64 Kb/s encoding method, and then various sensor information is converted into packets using the two B channels and sent between users on the D channel. Use the information to send it to the monitoring side. When the need for more detailed image information arises from monitoring various sensor information or image information, the necessary input from the image input unit is encoded using a 1.5 Mb/s encoding method according to instructions from the monitoring side. to change. At the same time, H between the monitoring side and the monitored side.
A channel is set, and image information encoded using a 1.5 Mb/s encoding method is transmitted to the monitoring side through the channel. [Embodiment] FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, in which only the remote monitoring device 10 and ISDN 30 are shown, and the monitoring side 2
0 is omitted. In Figure 1, 1 is two image input units, 2 is two image encoding units using an 84 Kb/s encoding method, and 3 is one image encoding unit using a 1.5 Mb/s encoding method. An image encoding unit 4 is an image signal switching unit, which converts the signal from the image input unit 1 into an image encoding unit 2 using a 64K b/s encoding method according to a control signal from the monitoring side 20.
or to the 1.5 Mb/s image encoding unit 3. 5 is various sensor input sections. 6 is a sensor signal packetization section, which multiplexes the signals from the sensor input section 5 to create a packet signal. 7 is a basic interface unit which inputs two 64 K b/s signals from the 64 K b/s image encoding unit 2 and a packet signal from the sensor signal packetizing unit 6 into an I.
Put it on the SDN basic interface (2B+D). 8
is a primary group interface section, which carries the 1.5 Mb/s signal from the 1.5 Mb/s image encoding section 3 to the ISDN primary group interface (Ho). Note that ■ to ■ indicate control signals. FIGS. 2(a) to 2(C) are diagrams showing logical channels of the ISDN 30 between the remote monitoring device 10 and the monitoring side 20 in the present invention. Solid lines represent open channels and dotted lines represent unopened channels. Figure 2(a) shows two B channels (B and B) through which 64kb/S image signals flow under normal conditions, and packetized sensor information and control signals from the monitoring side 20. The flowing D channel is open. Figures 2(b) and 2(c) show the situation when high quality image information is required, one of the B channels is closed,
H, channel is open. FIG. 3 is a diagram showing the transition between the states shown in FIGS. 2(a), (b), and (c) described above. The operation of the embodiment shown in FIG. 1 will be explained below. First, the operation of the normal remote monitoring device 10 in the state shown in FIG. 2(a) will be described. The image signal input by the image input section 1 is sent to the image signal switching section 4. In the image signal switching unit 4, the monitoring side 20
Control signal using inter-user information of Kamo D channel■,
Based on ■, the image signal from the image input unit 1 is
The image is sent to the image encoding unit 2 using the b/s encoding method. The encoded image signal is sent to the basic interface section 7, from where it is put on the B channel of the ISDN 30. Further, sensor information from various sensor input units 5 is converted into packets by a sensor signal packetization unit 6 and sent to a basic ink face unit 7, from where it is loaded onto the I5DN 30 as inter-user information on the D channel. Note that control such as when to send the sensor information can be changed by a control signal (2) from the monitoring side 20 using information between users on the D channel. The above is the normal operation of the remote monitoring device 10. Next, the operation of the remote monitoring device 10 when high-quality moving images are required, as shown in FIGS. 2(b) and 2(C), will be described. When some abnormality is recognized, the monitoring side 20 disconnects one of the B channels between the monitoring side 20 and the remote monitoring device 10 using the inter-user information of the D channel, In addition to setting the H channel, the image signal switching section 4 is instructed to select one of the image input sections 1 that is inputting necessary image information. The image signal switching unit 4 converts the instructed signal from the image input unit 1 to 1.5 Mb.
/S is sent to the image encoding unit 3. The image signal encoded here is sent to the primary group interface unit 8, and from there the I
It is carried on the H channel of the SDN 30 and sent to the monitoring side 20. The monitoring side 20 can know the detailed situation of the monitored side using the fine image information. The above two states mutually transition as shown in FIG. At this time, network control and control signals sent from the monitoring side 20 to the remote monitoring device 10 and the control signal to the image signal switching unit 4 will be described. Hereinafter, the B channel through which a signal flows when ■=1 in FIG. 1 will be referred to as B. S, ~S, are shown in Figure 2 (a) and (b)
), (c) show transition states between each other. Sl: At the time of transition from FIG. 2(a) to FIG. 2(b), the monitoring side 20 transmits the B1 channel disconnection signal to the remote monitoring device 10.
send to When the disconnection signal is received, the remote monitoring device 10
The control signal of the image signal switching unit 4 is as follows: ■=1. ■=1
It is. The monitoring side 20 sends a call setup signal for channel H to the remote monitoring device 10. At this time, the control signal of the image signal switching section 4 of the remote monitoring device 10 is ■=O9■=1. B2: Conversely, in the transition from FIG. 2(b) to FIG. 2(a), the monitoring side 20 sends an H, channel disconnection signal to the remote monitoring device 10. When the disconnection signal is received, the remote monitoring device 1
The control signal of the image signal switching unit 4 of 0 is ■=O1■=1
It is. The monitoring side 20 sends a call setup signal on the B1 channel to the remote monitoring device 10. At this time, the control signals of the image signal switching unit 4 of the remote monitoring device 10 are ■=l and ■=1. B3. B4: The transition from FIG. 2(a) to FIG. 2(C) and vice versa are the same and will therefore be omitted. B5: When transitioning from FIG. 2(b) to FIG. 2(c), the monitoring side 20 sends a disconnection signal for the B2 channel to the remote monitoring device 10. At this time, the control signal of the image signal switching section 4 of the remote monitoring device 10 is ■=O9■=1. The call setting signal of the B1 channel on the monitoring side 20 is sent to the remote monitoring device 10.
send to At that time, the control signal of the image signal switching unit 4 of the remote monitoring device 10 is ■=1. ■=O. B6: In the reverse transition from FIG. 2(c) to FIG. 2(b), the monitoring side 20 sends a channel disconnection signal to the remote monitoring device 10. When the disconnection signal is received, the control signal of the image signal switching unit 4 of the remote monitoring device 10 becomes ■=1. ■
=O. The monitoring side 20 sends a call setup signal for channel B to the remote monitoring device 10. The control signal of the image signal switching section 4 at that time is ■=0. ■=1. The control signals from layer 3 of the basic interface of the basic interface section 7 and ■ are the image signal switching section 4.
(2) controls the image input section 1, and (2) controls the sensor signal packetization section 6. FIG. 4 shows a processing flow of the operation shown in FIG. 3.

【Effect of the invention】

As stated above, this invention provides 1.5Mb/
s and 64 Kb/s image encoding section, an image signal switching section for switching between them, a sensor signal packetizing section, an ISDN basic interface section and a temporary group interface section, so normally 64 Kb/s is provided.
Communication charges can be reduced by using two types of encoding methods and corresponding communication lines, such as using a coarse 1.5 Mb/s encoding method and using a fine 1.5 Mb/s encoding method only when necessary. This has the advantage of being able to reduce

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
FIGS. 2(a) to 2(c) are diagrams showing the status of the ISDN logical channel between the remote monitoring device of the present invention and the monitoring side,
3 is a diagram showing the transition state in FIG. 2, and FIG. 4 is a processing flow diagram for explaining the operation of FIG. 3. In the figure, 1 is an image input section, 2 is a 64 Kb/s image encoding section, 3 is a 1.5 Mb/s image encoding section, 4 is an image signal switching section, 5 is various sensor input sections, and 6 is an image encoding section. 7 is a basic interface section, 8 is a primary group interface section, 10 is a remote monitoring device, 20 is a monitoring side, and 30 is an ISDN. Funeral map diagram

Claims (1)

[Claims] In a remote monitoring device having a sensor input section, an image input section, and an image encoding section for monitoring a remote location using a communication line, switching between the 1.5 Mb/s and 64 Kb/s image encoding sections It is equipped with an image signal switching section, a sensor signal packetization section, an ISDN basic interface section, and a temporary group interface section, and normally sends the sensor information from the sensor input section in packets using the inter-user information of the D channel. , low-quality image information encoded at 64 Kb/s from multiple image inputs is sent using the B channel, and when higher quality images are required, it is encoded at 1.5 Mb/s. A remote monitoring device characterized in that the image information is switched to image information by the image signal switching section.