JPH066338A - Digital information processing method and digital information processing unit - Google Patents

Abstract

PURPOSE:To prevent adverse effect on a reception state by revising a sampling frequency or a clock number used for a digital means in response to the recep tion frequency so as to prevent production of a disturbing radio wave. CONSTITUTION:A radio reception means 2 uses a reception frequency identification means 7 to identifies a frequency of a received radio wave and an arithmetic operation processing means 6 predicts whether or not the frequency is coincident with any of plural kinds of sampling frequencies or a frequency equivalent to a disturbing radio wave being a harmonic of its clock number. When the production of the disturbing radio wave is predicted, a frequency is selected among sampling frequencies or clock numbers not causing a disturbing radio wave and the selected frequency is sent to a clock signal generation drive means 8 driving the digital means 3 to revise the sampling frequency of the digital means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital information processing method and a digital information processing apparatus, and more particularly, it constitutes one digital information processing system by combining radio wave receiving means and digital information processing means. The present invention relates to a method for preventing the generation of jamming radio waves in a device and a device thereof.

[0002]

2. Description of the Related Art Conventionally, as a device that constitutes one digital information processing system by combining radio wave receiving means and digital information processing means, for example, a combination of radio or television and various digital arithmetic processing means. Alternatively, a large number of digital information processing apparatuses such as a combination of a radio and a CD player have been generally used.

However, in such a digital information processing system, in order to drive the analog / digital conversion circuit, the digital / analog circuit or other digital processing circuits, the basic clock oscillated from the clock generation circuit is divided. , Generate an appropriate frequency, synchronize each circuit, and use as a sampling frequency.
Each circuit is driven according to a predetermined program.

[0004] For example, in a digital audio equipment, 32KH _Z, are three 44.1KH _Z and 48KH _Z are determined by the standard as a sampling frequency. Then, a digital audio device such as a digital satellite broadcast receiver, a compact disc player, a digital audio tape (DAT) player, etc. outputs a digital audio signal based on at least one of the above sampling frequencies. . The digital audio signals output from these digital audio devices are given to an amplifier equipped with a digital input function, and the D / A built in the amplifier is used.
After being converted into an analog audio signal by the A converter, it is output from the speaker. Therefore, in such an amplifier, the sampling frequency of a given digital acoustic signal is judged to be one of the above-mentioned frequencies, and it is automatically switched to be converted into an analog acoustic signal. When driving the digital information processing apparatus at a certain sampling frequency in the system, a harmonic is generated in a frequency range corresponding to the sampling frequency or an integral multiple of the number of clocks, and the harmonic is generated. If the reception frequency of the radio wave receiving means, such as a radio or a television, coincides with the reception frequency, the reception state is adversely affected.

Further, the generation of such an interfering radio wave not only adversely affects the other digital information processing apparatus adjacent to the digital information processing apparatus or the radio wave receiving means as described above, but also its own digital information processing apparatus. It will also occur in the information processing system. Such interfering radio waves are generally referred to as electromagnetic unwanted radiation (EMI), and it has become necessary to avoid them as much as possible in such digital information processing systems. There are a method of adopting a mechanism that does not receive the interference wave and a method of preventing the interference wave from the digital information processing device itself. The effective prevention method has not been found.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the prior art and to effectively prevent the generation of the above-mentioned interfering radio waves by a simple circuit structure so that the reception state of the radio wave receiving means can be improved. Provided is a digital information processing method and a digital information processing apparatus which do not have a bad influence.

[0007]

In order to achieve the above-mentioned object, the present invention adopts the technical constitution as described below. That is, in an information processing system composed of radio wave receiving means, digital means, and control means connected to the radio wave receiving means and the digital means, the sampling frequency or the number of clocks used in the digital means is set. A digital information processing method for changing according to a reception frequency of the radio wave receiving means. Specifically, in the above configuration, the control means has a plurality of predetermined sampling frequencies or clock numbers different from each other. Is stored in advance, and when the radio wave receiving means receives a radio wave having a predetermined frequency, the sampling frequency or the number of clocks is stored in advance so that a harmonic equivalent to the reception frequency or a frequency in the vicinity thereof is not generated. Digital that is used by selecting from among the plurality of sampling frequencies or the number of clocks It is a multi-address processing method.

[0008]

The digital information processing method according to the present invention basically employs the technical configuration as described above, so that the frequency of the received signal received by the radio wave receiving means or a frequency in the vicinity thereof is specified. However, it is determined whether or not the sampling frequency or the number of clocks currently used by the digital means matches at least one of the generated harmonics, and if they match, it is used by the digital means. By switching the sampling frequency or the number of clocks to another frequency, the generation of interfering radio waves to the radio wave receiving means is prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of the digital information processing method according to the present invention will be described in detail below with reference to the drawings. Figure 1
FIG. 1 shows a configuration example of a digital information processing apparatus 1 used for executing one specific example of the digital information processing method according to the present invention. In the figure, a radio wave receiving means 2, a digital means 3 and In the information processing system 1 including the radio wave receiving means 2 and the control means 4 connected to the digital means 3, the sampling frequency or the number of clocks used in the digital means 3 is set to the radio wave receiving means. The digital information processing method for changing the received information according to the received frequency is shown.

In the digital information processing method according to the present invention, the digital means starts an analog / digital conversion circuit, a digital / analog conversion circuit, and executes digital information processing by a CD player, a personal computer, or the like. It includes any circuits or devices that can be obtained. on the other hand,
As the receiving means used in the digital information processing method according to the present invention, any receiving means having a function of receiving a radio signal inputted from the outside and transmitting information, such as a radio, a television, a telephone, etc. It can be used.

Therefore, the digital information processing system according to the digital information processing method according to the present invention is a combination of the above digital means 3 and the radio wave receiving means 2 as appropriate. It is not limited. Also, the combination of the respective means may be such that both, that is, the radio wave receiving means 2 and the digital means 3 are formed on one substrate, or both are formed as separate members and electrically connected. It may be a system having a configuration like that.

In the digital information processing method according to the present invention, in order to prevent the generation of the above-mentioned interfering radio waves, the radio wave receiving means 2 and the digital means 3 are connected to control their respective functions and operations. The control means 4 stores a plurality of predetermined different sampling frequencies or clock numbers, and the sampling frequency or clock number used in the digital means 3 is set as the reception frequency of the radio wave receiving means. The control means 4 is provided with a storage means 5 for storing a plurality of different sampling frequencies or clock frequencies.

The type of the sampling frequency or the number of clocks stored in the storage means 5 is not particularly limited, but the type of the reception frequency expected in advance in the radio wave receiving means 2 is known. In this case, a plurality of sampling frequencies or clock numbers, for example, three or more, are prepared and stored so that harmonics corresponding to the respective reception frequencies and frequencies in the vicinity thereof are not generated.

On the other hand, in the digital information processing method according to the present invention, the reception frequency discriminating means 7 for discriminating what frequency the reception frequency received by the radio wave receiving means 2 has is the control means. 4 is provided. Further, in the present invention, the reception frequency identifying means 7
The received frequency identified by the above is compared with the sampling frequency or the number of clocks currently used in the digital means 3, and one of the harmonics of the sampling frequency or the number of clocks is the received frequency or its vicinity. Is provided with arithmetic processing means 6 for identifying whether or not the frequency coincides with the frequency.
Therefore, it is connected to the reception frequency identification means 7, the storage means 5 and the clock signal generation drive means 8.

That is, in the digital information processing method according to the present invention, when the radio wave receiving means 2 receives a radio wave having a predetermined frequency, a harmonic equivalent to the received frequency or a frequency in the vicinity thereof is generated. A sampling frequency or clock number that does not occur is selected from the plurality of sampling frequencies or clock numbers stored in advance and used.

The digital information processing method according to the present invention will be described in detail. For example, there are three kinds of sampling frequencies for driving the digital means 3 in the storage means 5, namely 32 kHz, 44.1 kHz and 48 kHz. In the case where they are prepared in advance and are stored in the storage means 5, the sampling frequency is currently set to 3
2 kHz is selected, and the clock signal generation driving means 8 is selected.
It is assumed that the digital means 3 is driven via.

At this time, if the radio wave receiving means 2 matches one of the harmonics of the sampling frequency (32 kHz), the received radio wave is disturbed, so that the sampling frequency is set to 44.1 kHz, for example. To change. Also in this case, if the received radio wave is disturbed, the sampling frequency is further changed to 48 kHz.

That is, in the digital information processing method according to the present invention, in order to execute such processing, the arithmetic processing means 6 or the storage means 5 is stored in the storage means 5. It is desirable to store a plurality of types of sampling frequencies or clock numbers and a plurality of types of harmonics generated by them, and in the arithmetic processing means 6, the information output from the reception frequency identifying means 7 and Occurrence of an interfering radio wave is predicted from the sampling frequency or the number of clocks stored in the storage means 5 and their harmonics, and when the interfering radio wave is predicted to occur, the interfering radio wave may be generated. Of the sampling frequency or the number of clocks stored in the storage means 5 is selected, and the digital means 3 is driven. And changes the sampling frequency of the digital means 3 is transmitted to the clock signal generating drive means 8 that.

Therefore, as the digital information processing apparatus for executing the digital information processing method according to the present invention, the radio wave receiving means 2, the digital means 3, the radio wave receiving means 2 and the control means 4 for controlling the digital means 3 are provided. Consists of and
The control means 4 stores at least a reception frequency identification means 7 for identifying a reception frequency received by the radio wave reception circuit 2, and a plurality of types of sampling frequencies or clock numbers predetermined for driving the digital means 3. The storage circuit 5 to be stored, the sampling frequency or the number of clocks that does not generate a harmonic equivalent to the predetermined reception frequency received by the radio wave receiving circuit 2 or a frequency in the vicinity thereof is stored in advance in the storage circuit. An arithmetic processing means 6 for selecting from the plurality of sampling frequencies or the number of clocks, and a clock signal generation driving means 8 for driving the digital means based on the sampling frequency or the number of clocks selected by the arithmetic processing means 6. It is composed of

FIG. 2 shows a flow chart for executing the digital information processing method according to the present invention. That is, after the start, in step (1), the frequency of the received radio wave received by the radio wave receiving means 2 is identified, and in step (2), the reception frequency is a harmonic of the sampling frequency or the number of clocks. If it is YES, the sampling frequency or the number of clocks currently used in step (3) is set to another sampling frequency stored in the storage means. Alternatively, the number of clocks is switched, the process returns to step (1), and if NO, the process returns to step (1) and the above steps are repeated.

[0021]

Since the digital information processing method and the digital information processing apparatus according to the present invention adopt the above-mentioned configuration, the above-mentioned interference wave can be effectively prevented by the simple circuit configuration, It is possible to obtain a digital information processing method and a digital information processing device that do not adversely affect the reception state of the radio wave receiving means.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of an apparatus for implementing a digital information processing method according to the present invention.

FIG. 2 is a flowchart showing an example of an operation procedure when executing the digital information processing method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Digital information processing apparatus 2 ... Radio wave receiving means 3 ... Digital means 4 ... Control means 5 ... Storage means 6 ... Arithmetic processing means 7 ... Reception frequency identification means 8 ... Clock signal generation drive means

Claims (3)

[Claims] 1. An information processing system comprising radio wave receiving means, digital means, and control means connected to the radio wave receiving means and the digital means, wherein a sampling frequency used in the digital means or A digital information processing method, characterized in that the number of clocks is changed according to the reception frequency of the radio wave receiving means. 2. When the radio wave receiving means receives a radio wave having a predetermined frequency, a sampling frequency or a clock number is stored in advance so that a harmonic equivalent to the reception frequency or a frequency in the vicinity thereof is not generated. 2. The digital information processing method according to claim 1, wherein the digital means is driven by selecting from the plurality of sampling frequencies or the number of clocks used. 3. A radio wave receiving means, a digital means, a radio wave receiving means, and a control means for controlling the digital means. The control means at least identifies a reception frequency received by the radio wave receiving circuit. Frequency identification means, storage circuit for storing a plurality of sampling frequencies or clock numbers that are predetermined for driving the digital means, equivalent to a predetermined reception frequency received by the radio wave reception circuit or a frequency in the vicinity thereof Of the sampling frequency or the number of clocks that does not generate the higher harmonics from among the plurality of sampling frequencies or the number of clocks stored in advance in the memory circuit, and the arithmetic processing means. Clock signal generation for driving the digital means based on the sampling frequency or the number of clocks A digital information processing device comprising a driving means.