JPH0553756A - Information processing system - Google Patents

Abstract

PURPOSE:To reduce the burden of a main CPU and to surely secure the peak of a voice level by holding the maximum value of the voice date and converting this maximum level into the level display image data. CONSTITUTION:A signal. processor 43 is provided to process the voice data and also to detect the maximum value of the voice date together with a latch circuit 44 which holds the maximum value of the voice data received from the processor 43, and a main CPU 1.0 which reads the data of the maximum value out of the circuit 44 to convert this data into the level display image data, resets the data of the maximum value held in the circuit 44, and also processes other data. The CPU 10 reads the data out of the circuit 44 et a time interval larger than the sampling cycle of the voice data. Therefore the CPU 10 is not required to periodically receive the absolute value of the voices.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing system for processing voice signals and other data.

[0002]

2. Description of the Related Art Conventionally, there is a system such as a so-called workstation as an information processing system capable of processing, for example, audio signals, video information and other various data in parallel.

Here, in this information processing system,
For example, when processing the audio signal, a so-called level meter is usually displayed on the screen of a display device such as a cathode ray tube or a liquid crystal display in order to see the input level of the audio signal. A meter may be used to display the input level of the audio signal.

When the input level of the input audio signal is displayed on the level meter on the screen of the display device as described above, in the above information processing system, for example, a signal for processing the audio data obtained by sampling the input audio signal and digitizing it. The processor determines the absolute value of the audio data (the absolute value of the level of the audio signal), and further converts the absolute value data into level display image data to be displayed on the level meter on the screen of the display device. By transmitting it to the display processor, the level display on the level meter is realized.

[0005]

Further, in the above information processing system, in many cases, for example, video information processing and other various data processing are performed in parallel with the audio signal processing. In this case, the display processor is
Display of the video data on the screen of the display device, conversion of various data into character data or image data, and the like for display on the screen of the display device must be simultaneously performed. Therefore, the processing amount of the display processing processor becomes enormous.

By the way, when the audio level is displayed on the level meter displayed on the screen of the display device, the transmission rate of the absolute value data supplied to the display processing processor is equal to the sampling frequency of the audio data. Is the same. Therefore, the display processor has a limitation that it must always read the high-speed absolute value data of the transmission rate.

However, as described above, the display processing processor has to perform various information processing in parallel with the level meter display processing of the audio level, so that it is often used only for the level meter display of the audio level. Can not be processed. Therefore, normally, the display processing processor is designed to widen the interval of capturing (reading) the absolute value data for displaying the audio level.

However, if the data reading interval is widened as described above, for example, the peak of the audio level may not be read (the peak may be missed).

Therefore, the present invention has been proposed in view of the above circumstances, and it is necessary to reduce the load on the display processing processor, to eliminate the need for high-speed processing, and to capture the audio level at regular time intervals. It is another object of the present invention to provide an information processing system capable of displaying a level without missing a voice level peak.

[0010]

The information processing system of the present invention has been proposed in order to achieve the above-mentioned object, and an audio data obtained by sampling an input audio signal at a constant sampling cycle is used. The audio signal processing means which is supplied and processes the audio data and detects the maximum value, the holding means which holds the maximum value of the audio data from the audio signal processing means, and the maximum value which is held in the holding means After the data is read out and converted into level display image data, the maximum value data held in the holding means is reset, and display processing means for processing other data in parallel is also provided, and The reading of the data from the holding means by the processing means is performed at a time interval longer than the sampling cycle of the audio data.

[0011]

According to the present invention, since the maximum value of the audio data is held in the holding means and this maximum value is converted into the level display image data by the display means, the peak of the level of the audio data can be missed. Absent.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The information processing system according to the present embodiment is exemplified by one that operates as a so-called workstation.

As shown in FIG. 1, the information processing system of the present invention is supplied with audio data obtained by sampling an analog input audio signal via an input terminal 41 at a constant sampling period, and supplies this audio data. A signal processing processor 43 which is an audio signal processing means for processing and detecting the maximum value, a latch circuit 44 which is a holding means for holding the maximum value of the audio data from the signal processing processor 43, and a latch circuit 44. As a display processing means for reading the maximum value data thus read out and converting it into level display image data, resetting the maximum value data held in the latch circuit 44 and processing other data in parallel. It has a main CPU 10 and the main CPU 10 reads the data from the latch 44 by It is obtained as a time interval longer than the sampling period of the data.

That is, in FIG. 1, the input terminal 4
The analog audio signal via 1 is sampled by the analog / digital (A / D) converter 42 at the constant sampling period and converted into digital audio data. The audio data is the signal processor 4 described above.
3 is supplied. The signal processor 43 processes the audio data, and sends the processed audio data from an audio processing data output terminal (not shown) to a subsequent configuration (for example, a storage unit such as the hard disk 30 described later). At this time, the signal processor 43 detects the maximum value data of the audio data. The maximum value data is transmitted to the latch circuit 44.

The maximum value data from the signal processor 43 is the data input terminal (D0 of the latch circuit 44.
~ D15). Further, the signal processor 43 outputs a write signal to the clock input terminal of the latch circuit 44 simultaneously with the output of the maximum value data. Therefore, the latch circuit 44 receives the write signal and latches the maximum value data supplied to the data input terminal.

Further, the main CPU 10 outputs a read signal to the latch circuit 44 at appropriate time intervals. This read signal has a time interval longer than the sampling period of the audio data, and this time interval does not have to be constant. The latch circuit 44 receives the read signal, outputs the held maximum value data from the data output terminals (Q0 to Q15), and
The held maximum value data is cleared (reset). The maximum value data output from the latch circuit 44 is sent to the main CPU 10. The main CPU1
At 0, the maximum value data sent from the latch circuit 44 is converted into level display image data and supplied to the display device 23 such as a cathode ray tube or a liquid crystal display. In the display device 23, the level based on the level display image data is displayed on the level meter 22 which is image-displayed on the screen.

Further, the read signal from the main CPU 10 is also sent to the signal processor 43. That is, the signal processor 43 can know that the value in the latch circuit 44 has been reset to 0 by the read signal. Also, this signal processor 4
3 uses the read signal from the main CPU 10 as a reset signal to clear the maximum value data in the signal processor 43.

Here, the main CPU 10 performs video information processing and other various information processing as will be described later, in addition to the audio level display processing on the level meter 22 as described above, and the display device 23. In addition to the image display processing above, it also operates as the main CPU of the workstation. Further, as will be described later, various controls such as recording the audio data subjected to the signal processing by the signal processor 43 to the hard disk 30 are also performed.

That is, in the workstation of this embodiment, as shown in FIG. 2, for example, the main CPU 10 for controlling the entire system and the display circuit 20 for driving the cathode ray tube 21 of the display device 23 are displayed.
And a hard disk 30 for recording / reproducing audio data and other various data, an A / D converter 42, a signal processor 43, a latch circuit 44 of FIG. An audio processing circuit 40, a keyboard 12 for data input,
It has an interface circuit 13 to a so-called local area network (LAN) and a main memory 11, and each component is connected via a bus.

Therefore, the main CPU 10 performs various processes such as recording of voice data on the hard disk 30 and communication with the keyboard 12 in addition to the level display on the level meter 22 of the display device 23. become. Further, not only the level meter 22 is displayed on the display device 23, but, for example, as shown in FIG. 3, a screen 28 is displayed, for example, a window 25 for displaying the CPU load or a window for displaying time information. 26,
A window 27 for displaying the remaining capacity of the hard disk, a window 24 for displaying destination data of the local area network, etc. are displayed, and the main CPU 10 also generates these display data.

From the above, the main CPU is
No. 10 cannot take a large amount of processing only for displaying the level on the level meter 22. Therefore, in the apparatus of this embodiment, when the audio level is displayed, only the maximum value data held in the latch circuit 44 is sent to the main CPU 10 from the signal processor 43. Therefore, the main CPU
The load of 10 does not become large. Further, since the maximum value data is reset every time it is sent to the main CPU 10, the peak of the audio level is not missed.

FIG. 4 shows an example of a concrete configuration for detecting the maximum value data in the signal processor 43. That is, in FIG. 4, the audio data sent from the A / D converter 42 is supplied to the absolute value calculation circuit 52 via the terminal 51, and the absolute value calculation circuit 52 uses the absolute value of the audio data of the sampling value. The value is calculated. The absolute value data obtained by the absolute value calculation circuit 52 is stored in the memory 54 via the comparator 53. The comparator 53
Is supplied with the following absolute value data. At this time, the absolute value data stored previously is read from the memory 54 and sent to the comparator 53. Therefore, the comparator 53 compares the above-mentioned absolute value with the subsequent absolute value, and outputs the absolute value data when the latter absolute value is larger. This absolute value data is output from the output terminal 56. That is, the absolute value data output from the output terminal 56 becomes the maximum value data sent to the latch circuit 44. The terminal 55 has the main CP
A reset signal (the read signal) from U10 is supplied, and the reset signal clears the memory 54.

As described above, in the information processing system of this embodiment, the signal processor 43 that processes the audio data and detects the maximum value, and the maximum value of the audio data from the signal processor 43 are held. The latch circuit 44 and the maximum value data held in the latch circuit 44 are read out and converted into level display image data, and then the maximum value data held in the latch circuit 44 is reset and other data is processed. Also has a main CPU 10 for processing in parallel, and the main CPU 10 reads data from the latch 44 at a time interval longer than the sampling cycle of the audio data. , Even if you don't need to receive the absolute value data of the voice regularly, the voice level peak Lose information that it is not, also, be made lightly the burden of data processing. Therefore, the main CPU
It is possible for 10 to perform other processing.

Although the signal processor 43, the latch circuit 44, and the main CPU 10 are shown as separate components in the above-described embodiments, for example, the latch circuit 44 may be provided in the signal processor 43. Alternatively, it may be provided in the main CPU 10. Further, the signal processor 43, the latch circuit 44, and the main CPU 10
It is also possible to use the same processor. However, in this case, the present invention runs with time sharing.
It is applied to data transmission between two programs (a signal processing program and a display processing program).

[0025]

As described above, in the information processing system of the present invention, the audio signal processing means for processing the audio data, the holding means for holding the maximum value of the audio data, and the held maximum value data are stored. After reading out and converting into level display image data, it has a display processing means for resetting the held maximum value data and processing other data in parallel. Since the data reading is performed at a time interval longer than the sampling cycle, the load on the display processing means is reduced, high-speed processing is unnecessary, and it is not necessary to capture the audio level at a constant time interval. It is possible to display the level without missing the peak of the audio level.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a main part of an information processing system according to an embodiment.

FIG. 2 is a block diagram showing a configuration of a workstation according to the embodiment.

FIG. 3 is a diagram showing an example of a display screen of a display device.

FIG. 4 is a block diagram showing a schematic configuration of a main part of a signal processor.

[Explanation of symbols]

 10-Main CPU 22-Level meter 23-Display device 30-Hard disk 42-A / D converter 43- .... Signal processor 44 .... Latch circuit

Claims (1)

[Claims] 1. An audio data obtained by sampling an input audio signal at a constant sampling period is supplied,
Audio signal processing means for processing the audio data, holding means for holding the maximum value of the audio data from the audio signal processing means, and data of the maximum value held in the holding means is read out to be level display image data. After the conversion, the holding means is reset and display processing means for processing other data in parallel is also provided, and the reading of the data from the holding means by the display processing means is performed by sampling the audio data. An information processing system having a time interval longer than a cycle.