JPH11338029A - Optical equipment or equipment used together with optical equipment, and photographing equipment or equipment used together with photographing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally perform the initializing operation of serial communication considering the recovery of a communication error even when the communication error is caused by initializing the serial communication in the case of deciding that a signal is an improper signal. SOLUTION: When the CPU 7 of a television lens 1 receives the signal from a television camera 2 through the serial communication 9, a timer is started. Circumstances that the signal is not inputted from the camera 2 (time out) are judged as an abnormal state, so that processing is shifted to reset processing routine. The reset processing routine is the first operation performed at the time of connecting the lens 1 and the camera 2. In order to recognize the equipment each other, the equipment is confirmed according to an initializing command or the like. When parity and check sum are improper, the processing is restored to the reset processing routine in the case of out-of-specification command. In the case of judging that it is a regulated command, the processing is shifted to a routine for interpreting and executing the command.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device or a device used together with an optical device in a communication system between a device such as a television camera and a photographic lens, and a device used together with a photographic device. is there.

[0002]

2. Description of the Related Art Conventionally, an electrical interface between devices between a television lens and a television camera uses a multi-pin connector, and one connector pin has one function. For example, the iris control signal for controlling the aperture of the television lens from the television camera uses the fifth pin of the 12th pin.

That is, each pin of the 12-pin connector has:
Each pin had one function.

[0004]

By the way, in television broadcasting in recent years, clearer television images have been demanded more than ever. In addition to the items of the interface between the television camera and the television lens described in the conventional example, for example, There is a need to inform the television camera of detailed lens information items.

[0005] However, there are already no empty pins in the connector pins between the television lens and the television camera, and the conventional electric interface between the television camera and the television lens cannot meet these requirements.

Therefore, as a new electric interface, it has been proposed to connect a television lens and a television camera by serial communication using digital signals.
In this case, new information can be added to information exchanged by serial communication in addition to the conventional electric interface items.

However, a problem here is how to deal with a case where a communication error occurs in serial communication.

In the case of the conventional electric interface, even if a problem occurs with one connector pin, only one function fails, and the other functions operate normally. This makes it possible to cope with the situation even during shooting.

[0009] For example, when a failure occurs in which the iris control signal for moving the aperture of the television lens is not transmitted to the television lens, the cameraman can manage the iris operation manually to perform shooting.

However, when a communication error occurs in the serial communication, all interface functions between the television lens and the television camera are stopped. Therefore, when a communication error occurs, it is required to return the communication to normal immediately.

An object of the invention according to the present application is to provide an optical apparatus or an optical apparatus which can reasonably perform a serial communication initialization operation in consideration of recovery of a communication error even if a communication error occurs in the serial communication. It is an object of the present invention to provide a device used together with a device, and a shooting device or a device used together with a shooting device.

[0012]

A first configuration of an optical apparatus or an apparatus used together with the optical apparatus for realizing the object of the present invention according to the present application is as follows. In an optical device in a communication system that communicates with a device used together with the device or in a device used together with the optical device, a determination unit that determines a signal communicated by the communication unit, and the signal is determined by the determination unit. An initializing means for initializing serial communication when it is determined that the signal is inappropriate is provided.

[0013] In a second configuration of the optical device for realizing the object of the invention according to the present application or a device used together with the optical device, the determining means determines whether the signal is a signal other than a predetermined rule. Or, determine whether the signal is in an inappropriate state for data transmission, and when the signal is a signal other than a predetermined rule, or a signal in an inappropriate state for data transmission, an inappropriate signal Is determined.

According to a third aspect of the present invention, an optical device for realizing the object of the present invention or a device used together with the optical device, the device is configured to perform a predetermined signal after determining that the signal is inappropriate by the determination. When communication is not performed again by the communication unit within a time period, or when it is determined that the signal obtained by the second communication is an inappropriate signal in the determination by the determination unit, the initial Control means for performing an initialization operation by the initialization means.

According to a fourth aspect of the invention, an optical device for realizing the object of the present invention or a device used together with the optical device is such that the judging means uses a parity check or a sum check to determine an inappropriate state for the data transmission. In this case, it is determined whether or not the signal has become.

According to a fifth aspect of the present invention, there is provided an optical apparatus for realizing the object of the present invention or an apparatus used together with the optical apparatus, wherein the optical apparatus is a taking lens.

A first configuration of a photographing device or a device used together with the photographing device that realizes the object of the invention according to the present application is a device that uses digital information through serial communication means and a device used with the photographing device. A photographing device in a communication system that communicates with the photographing device or a device used together with the photographing device, a determining unit that determines a signal communicated by the communication unit, and the signal is an inappropriate signal by the determining unit. When it is determined that the serial communication has been performed, initialization means for initializing the serial communication is provided.

According to a second aspect of the present invention, there is provided a photographing device or a device used together with the photographing device, wherein the determining means determines whether or not the signal is a signal other than a predetermined protocol. Or, determine whether the signal is in an inappropriate state for data transmission, and when the signal is a signal other than a predetermined rule, or a signal in an inappropriate state for data transmission, an inappropriate signal Is determined.

According to a third aspect of the present invention, a photographic device or a device used together with a photographic device that realizes the object of the invention according to the present invention is configured such that after the device determines that the signal is an inappropriate signal, When communication is not performed again by the communication unit within a time period, or when it is determined that the signal obtained by the second communication is an inappropriate signal in the determination by the determination unit, the initial Control means for performing an initialization operation by the initialization means.

According to a fourth aspect of the invention, there is provided a photographing apparatus for realizing the object of the present invention or a device used together with the photographing apparatus. In this case, it is determined whether or not the signal has become.

According to a fifth aspect of the present invention, there is provided a photographing device for realizing the object of the present invention or a device used together with the photographing device, wherein the optical device is a photographing lens.

According to a sixth aspect of the present invention, there is provided a photographing device for realizing the object of the present invention or a device used together with the photographing device, wherein the photographing device is a pan head device.

[0023]

(First Embodiment) FIG. 1 is a block diagram of a television camera and a television lens according to a first embodiment of the present invention.

In FIG. 1, the CPU 7 of the television lens 1
Information is exchanged between the device and the CPU 8 of the television camera 2 by a command of a digital serial interface (hereinafter, referred to as serial communication) or the like. For example, when an iris command signal is output from the CPU 8 of the television camera 2, the CPU 7 of the television lens 1
And the motor 5 is driven by the motor drive circuit 4 via the signal processing circuit 3. The diaphragm position information from the potentiometer 6 connected to the diaphragm ring driven by the motor 5 is fed back to the CPU 7.

FIG. 2 is an example of a flowchart in the case of an error in the communication from the television camera 2 in the serial communication of FIG.

In the system assumed in FIG. 2, the communication path between the television lens and the television camera is directly connected by a connector or the like.
This is a case where almost no noise is mixed in a communication path for performing serial communication.

In other words, the main source of the communication error is considered to be the TV camera. If a communication error occurs in such a case, the TV camera is informed of an abnormal command, As shown in FIG. 2, there is a method of starting the serial communication of the TV lens / TV camera from the initialization by a reset processing routine.

As communication errors in the serial communication, there are a parity error and a checksum error that occur when bits constituting a communication command are different from the original signal.

The parity error is one of the systems for checking whether or not transmission information is transmitted and received correctly in data transmission, and is a system in which one bit of a check bit (parity bit) is added to the check of transmission information. The parity check includes odd parity and even parity. For example, in the case of an odd parity, if the number of "1" information bits is even, the number of parity bits is set to "1" so that "1" of the entire transmission information is odd and transmitted. If the transmission information "1" received on the receiving side is an odd number, it is determined that the transmission information is correct, and if it is an even number, it is determined that the transmission information has an error.

A checksum (also referred to as a checksum) is a method of detecting an error in data transmission. A sum (sum) of all data in a data block is transmitted after the data block and transmitted. In this method, the sum of blocks is calculated, and when the data block ends, the sum is compared with the received sum, and if they match, it is determined that there is no error.

Even if there is no parity error and no checksum error, a communication error occurs in a command that has not been negotiated in serial communication between the television lens 1 and the television camera 2.

When any signal is received from the serial communication 9 from the television camera 2 to the CPU 7 of the television lens 1, a routine shown in FIG. 2 is started.

Since the signal from the camera 2 is received in step 201, the timer for timeout set when the previous signal from the television camera is received is reset to zero in step 202, and at the same time, this timer is started. .

The timer for timeout is an exchange of serial communication signals between the television camera and the television lens. If it is specified that the signal from the television camera is always transmitted to the television lens at a certain cycle, the signal from the television camera is transmitted for some reason. Is not present (time-out 206), it is determined that an abnormal situation has occurred, and the reset processing routine 207
Move to.

The set time of the timeout timer is about 5 to 10 times the cycle of the signal from the television camera. The CPU in the TV camera is to make the cycle 5 to 10 times longer
However, rarely, in order to perform another emergency operation in the television camera, consideration is given to delaying the cycle. The reset processing routine 207 is the first operation performed when the television lens and the television camera are connected, and is confirmed by an initialization command or the like in order to recognize each other's devices.

In step 203, it is checked whether the parity is normal. If improper (No), a reset processing routine 207, which is previously determined between the television lens and the television camera and is mutually confirmed between the devices by an initial command or the like, is performed.

If it is determined in step 203 that the parity is OK, the checksum in step 204 is performed.
In the case of a command not negotiated by serial communication between the TV lens 1 and the TV camera 2 (non-standard command)
Returns to the reset processing routine 207.

When it is confirmed that the command is specified in step 205, the process exits the routine of FIG. 2 and shifts to a routine for interpreting and executing a command (not shown).

As described above, in FIG. 2, when a communication error occurs, the reset processing routine is immediately started.

(Second Embodiment) FIG. 3 shows a second embodiment, and is a flowchart in the case of an error in the communication from the television camera 2 in the serial communication of FIG.

The system assumed in FIG. 3 is used when the communication path between the TV lens and the TV camera uses a long cable or the like, or when there is a high possibility that noise is mixed near the serial communication path. Bits of the signal inside may change due to external noise, causing a parity error or a checksum error. Further, although the occurrence rate is stochastically low, a plurality of bits change due to noise, and the parity and checksum are O.
May be K. At this time, at least, it is determined whether this signal is a prescribed command, so that even a little effective processing is performed.

In FIG. 3, when a communication error occurs due to noise or the like, the timer is started and the next command from the television camera is waited. If this command is normal, the routine exits from the routine of FIG. Is interpreted and the routine shifts to a routine to be executed. If this command is not appropriate, a reset processing routine is entered.

In FIG. 3, the CPU 7 of the TV lens 1
When any signal is received from the serial communication from the television camera 2, the routine shown in FIG. 3 is started.

In step 301, the signal from the television camera 2 is received. In step 302, the timer for timeout which was set when the previous signal from the television camera came is reset to zero, and at the same time, this timer is started. .

This time-out timer is an exchange of serial communication signals between the television camera and the television lens. If the signal from the television camera is always transmitted to the television lens at a certain cycle, the timer from the television camera is transmitted for some reason. Is not appropriate (timeout 311), the reset process routine 31
Move to 2.

When the processing in step 302 is completed, it is checked in step 303 whether the parity is normal. If improper (No), the process proceeds to step 306. If the parity is OK in step 303, the sum check in step 304 is performed.
In the case of a command that has not been determined by serial communication between them (a non-defined command), the process proceeds to step 306. If the command is normal, the process exits from this routine and shifts to a routine for interpreting and executing a command (not shown).

The activation of the timer for setting the predetermined time in step 306 is to activate a timer set for a time slightly longer than the prescribed cycle of the command transmitted from the television camera 2, for example, about 1.5 times the cycle. .

In step 307, if a signal from the television camera comes within a predetermined time (reception interruption) (Ye
s), the parity is checked in step 308, the checksum is checked in step 309, and it is checked whether the command is specified in step 310.

Parity and checksum are not correct (abnormal)
If it is not a prescribed command, the process enters a reset processing routine of step 312.

Only for the commands for which the parity and the sum check are normal and specified, the process exits from this routine and shifts to a routine for interpreting and executing a command (not shown).

At step 307, if no signal is received from the television camera within a predetermined time (No), the process proceeds to a reset processing routine of step 312.

If the timer set in step 306 is set to be at least twice as long as the specified cycle of the command transmitted from the television camera 2, the timer comes sequentially from the television camera 2 within a predetermined time. The command is checked for errors. If the command is invalid, the next command is checked for errors again. When a normal command is received, this command is interpreted and executed. If only an incorrect command is received, the process proceeds to an initialization routine.

In the reset processing routine in each of the above-described embodiments, each device confirms each other by an initial command or the like as described above, that is, the identity representing the type of the lens from the lens to the camera is transmitted from the lens to the camera. The first predetermined communication process (original data communication operation) performed at the start of communication such as power-on between the camera and the lens, such as communication for notifying or notifying the lens of the identity indicating the type of the camera from the camera. (Initialization communication) as pre-processing for performing

In each of the embodiments described above, the television lens device has been described. However, the same applies to a remote control pan head device which is equipped with a television camera and a television lens and is operated remotely. The remote control head device controls a remote control head, which is placed at a remote place in order to take pictures of scenes of various places, for example, in a morning broadcast program from a broadcast station using an operation panel. The communication between the remote control head and the operation panel is digital serial communication, and by applying the present invention, even if a communication error occurs, a very quick response can be performed.

In an optical transmission device for transmitting data and images optically in space, data and images are transmitted and received using light, for example, by facing the optical transmission device between buildings across a road. These data and images are multiplexed with digital serial communication signal format information by various methods such as time division and frequency division, and tracking data for correcting the attitude of the optical transmission device, received light intensity, and other networks. Necessary information and the like are exchanged between the optical transmission devices. By applying the present invention to the digital serial communication between the optical transmission devices, even if a communication error occurs, a very prompt response can be taken.

[0056]

As described above, according to the first to eleventh aspects of the present invention, when a communication signal received by a device between devices, for example, between a television lens and a television camera, is an error, the communication between the devices is failed. Initialization of serial communication can be quickly performed, and reliable information transmission between devices becomes possible.

According to the third aspect of the present invention, when a long cable is used between devices, for example, a communication path between a television lens and a television camera, or when there is a noise source near the television camera or the television lens. Even if a communication error occurs due to noise or the like entering the communication path for serial communication,
The start of the timer waits for the next command from the television camera. During the waiting, no noise or the like is mixed. As a result, if this command is normal, the command is interpreted and executed. Thus, it is suitable when noise or the like is mixed in the communication path. Even if a communication error occurs, normal serial communication can be quickly returned.

[Brief description of the drawings]

FIG. 1 is an electric block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment;

FIG. 3 is a flowchart showing the operation of the second embodiment.

[Explanation of symbols]

 1 TV Lens 2 TV Camera 3 Signal Processing Circuit 4 Motor Drive Circuit 5 Motor 6 Potentiometer 7, 8 CPU 9 Serial Communication

Claims (11)

[Claims] An optical device or a device used with an optical device in a communication system for communicating digital information between an optical device and a device used with the optical device via serial communication means, wherein the communication means Determining means for determining the signal communicated in;
An optical device or a device used with an optical device, further comprising an initialization device for initializing serial communication when the determination device determines that the signal is an inappropriate signal. 2. The method according to claim 1, wherein the determining unit determines whether the signal is a signal other than a predetermined rule or a signal in an inappropriate state for data transmission. The optical device according to claim 1, wherein the signal is determined to be an inappropriate signal when a signal other than the specified protocol or a signal in an inappropriate state in data transmission is used. machine. 3. The apparatus according to claim 1, wherein the communication is not performed again by the communication unit within a predetermined time after the apparatus determines that the signal is inappropriate, or a signal obtained by the communication is performed again. 3. The control device according to claim 1, further comprising a control unit that causes the initialization unit to perform an initialization operation when the determination unit determines that the signal is inappropriate. Optical equipment or equipment used with optical equipment. 4. The apparatus according to claim 1, wherein the determination unit determines whether the signal is in an inappropriate state for the data transmission by a parity check or a sum check. Optical equipment or equipment used with optical equipment. 5. The optical device according to claim 1, 2, 3, or 4, wherein the optical device is a photographic lens. 6. A photographing device in a communication system for communicating digital information between a photographing device and a device used with the photographing device via serial communication means, or a device used with the photographing device, wherein the communication means Determining means for determining the signal communicated in;
A photographing device or a device used with the photographing device, further comprising initialization means for initializing serial communication when the determination means determines that the signal is an inappropriate signal. 7. The determination means determines whether the signal is a signal other than a predetermined rule or a signal in an inappropriate state for data transmission, and determines whether the signal is a predetermined signal. 7. A photographing apparatus or a photographing apparatus according to claim 6, wherein the signal is determined to be an inappropriate signal when the signal does not conform to the specified protocol or when the signal is in an inappropriate state for data transmission. machine. 8. The apparatus according to claim 1, wherein the communication means does not perform communication again within a predetermined time after the determination is made that the signal is inappropriate, or a signal obtained by performing the communication again. 8. A control unit according to claim 6, further comprising a control unit for performing an initialization operation by the initialization unit when it is determined that the signal is inappropriate in the determination by the determination unit. Equipment used in conjunction with the photographic equipment or photographic equipment. 9. The apparatus according to claim 6, wherein the determination unit determines whether the signal is in an inappropriate state for the data transmission by a parity check or a sum check. Photography equipment or equipment used with photography equipment. 10. The photographing device according to claim 6, 7, 8 or 9, wherein the optical device is a photographing lens. 11. The photographing apparatus according to claim 6, 7, 8, 9 or 10, wherein the photographing apparatus is a pan head device.