JPH03145400A - Signal processor for sound field reproduction - Google Patents

Abstract

PURPOSE:To offer a sound field in response to the preference of all users by providing a memory card having a sound field data and a processor main body separately and increasing kinds of sound fields with the memory card only without being limited by the processor main body. CONSTITUTION:An external storage medium formed as a card is provided as a memory card 3. In this case, since the sound field is determined with sound field data stored in the memory card 3 and the memory card 3 is removed from the processor main body 1 via a data input section 2. Thus, kinds of the sound fields are not limited by the storage capacity of a storage medium built in the main body 1 and lots of kinds of data are prepared by the memory card 3. Thus, the sound fields in response to the preference of all users are offered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a signal processing device for sound field reproduction, which is used in an audio reproduction device, and in particular, relates to a signal processing device for sound field reproduction that processes signals by simulating the reflected sound and transmission characteristics of the sound field. It is something.

[Conventional technology]

Usually, an audio reproduction device is provided with a signal processing device for sound field reproduction (hereinafter referred to as a sound field control device) for creating a sense of presence during reproduction. This sound field control device has sound field data that converts reflected sound components and transmission characteristics corresponding to the sound field where the performance is performed, and simulates the sound field based on this sound field data. It has become.

When a plurality of sound fields exist, the above-mentioned sound field data needs to be created corresponding to each sound field. Therefore, in the conventional sound field control device, a plurality of sound field data corresponding to each sound field are stored in the ROM (Re), which is a storage medium built into the sound field control device.
ad 0nly Memory) and RAM (Ran
dom AccessS MemOry).

Thereby, the sound field control device can select an arbitrary sound field by, for example, reading out the stored sound field data from the operating section of the sound field control device in accordance with a predetermined procedure.

[Problem to be solved by the invention]

However, the conventional sound field control device described above has problems in that the operating procedure for selecting a sound field is complicated and increases the cost.

That is, it is desirable that the sound field corresponds to the user's preferences, but these preferences differ from user to user. Therefore, the conventional sound field control device is designed to provide a sound field that corresponds to the preferences of each individual user by having a large number of sound fields.

However, when selecting a sound field, it is necessary to select a sound field using a predetermined operating procedure using the operating section, and this operating procedure tends to become more complicated as the number of selectable sound fields increases.

In addition, the sound field data is stored in the R
It is stored in storage media such as OM and RAM, but it is desirable that the storage capacity of the Q medium be small in order to reduce the cost of the device.However, if the storage capacity is reduced, the sound The capacity of field data will be limited,
The selection range of the sound field will be reduced.

In this way, it is desirable for conventional sound field system III devices to have many types of sound fields;
When there are many types of sound fields, the operating procedure becomes complicated and the cost of the device increases. Furthermore, when there are many types of sound fields, some sound fields that are unnecessary to the user may be included, and the sound field desired by the user may be stored with low efficiency in a large storage capacity. . In this case, the price of the storage medium for the desired sound field will increase.

Therefore, in the present invention, the procedure for setting the sound field is extremely simple, and the selection of the sound field is not limited by the storage capacity, and only the sound field desired by the user is provided. An object of the present invention is to provide a signal processing device for sound field reproduction that can reduce the economic burden on the user.

[Means for Solving the Problems] In order to solve the above problems, the signal processing device for sound field reproduction according to the present invention includes a processing device main body that processes a strange signal based on sound field data. . That is, the specific processing device main body is formed of, for example, a CPU, a DSP, or the like. Further, the signal processing device for sound field reproduction includes a memory card having the above-mentioned sound field data, and a data input section for transmitting the sound field data from the memory card to the main body of the processing device. The data input section and memory card mentioned above are
It is characterized in that the output side terminal section provided on the memory card and the input side terminal section provided on the data input section are detachable.

[For production]

According to the above configuration, the memory card has sound field data, and this sound field data is used for signal processing of the strange signal in the main body of the processing device. At this time, the memory card containing the above sound field data is separated from the main body of the processing device. Therefore, the sound field data is not limited by the signal processing device for sound field reproduction, and many types of sound field data can be provided by the memory card. If many types of sound field data are provided on a memory card, it will be possible to efficiently provide the sound fields desired by all users, and it will also be possible to efficiently provide the sound fields desired by each user. It becomes possible to arbitrarily select only data.

As a result, the signal processing device for sound field reproduction only needs to have the minimum necessary storage capacity for sound field data, and the user only has to purchase the memory card he/she needs. It becomes possible to reduce the economic burden.

Further, the memory card is removably attachable to the data input section, and the sound field data of the memory card is transmitted from the data input section to the main body of the processing device. Therefore,
To set the sound field data, all you have to do is insert a memory card into the data input section, making the operating procedure extremely simple.

[Example] An example of the present invention will be described below based on FIG.

As shown in FIG. 1, the signal processing device for sound field reproduction (hereinafter referred to as the sound field control device) according to the present embodiment processes the input strange signal based on sound field data and outputs the signal. It consists of a processing device main body 1, a memory card 3 having sound field data such as the above-mentioned signal processing algorithms and parameters, and a data processing unit 2 for transmitting the sound field data from the memory card 3 to the processing device main body 1. ing.

The above memory card 3 includes a memory 4 such as a ROM, for example.
is built-in. The memory 4 stores sound field data such as algorithms for calculating the reflected sound components and transmission characteristics of the sound field and parameters required for the calculations, such as multiplication coefficients and delay memory R/W addresses. Thereby, the sound field control device can obtain a sense of presence and a feeling of lingering tongue by simulating a specific sound field based on the above sound field data. In the memory card 3, sound field data is stored in the memory 4 so as to simulate a sound field at one location for the - number of memory cards 3.

The above memory card 3 is provided with an output side terminal section 5 that outputs the sound field data stored in the memory 4. On the other hand, the above-mentioned data human power section 2 includes the above-mentioned output side terminal section 5.
An input side terminal portion 16 is provided to which the input side terminal portion 16 is removably fitted. Thereby, the memory card 3 fitted into the data input section 2 can be replaced at will via the detachable output terminal section 5 and input terminal section 16.

The input side terminal section 164 is provided with an interface section 17 (1/F) that transmits sound field data from the memory card 3 to the processing device main body 1. This interfunisis section 17 converts the sound field data into a predetermined signal output such as an electrical digital signal or a pulse signal using infrared light. As a result, data input section 2
is formed integrally with the processing apparatus main body 1, or is built into a remote control or the like and formed by the processing apparatus main body 1 and the part MlfL.

The processing device main body 1 that receives the sound field data from the data input section 2 described above is connected to a CPU 6 (
Central Processing Unit
)have. This CPU 6 includes a ROM 7 in which a program for executing the CPU 6 is written, a RAM 8 used as a temporary storage location while the CPU 5 is running, and a display 9 ( DISPLAY) is connected.

Furthermore, the above CPtJ6 is equipped with a digital signal processing dedicated DSPlo (Di
digital signal processor)
is connected. This DSPLo has instruction numbers 1. Memory 11 (
MEMORY) is connected.

Furthermore, on the input side of the DSP 10, there is a digital interface unit 12 (Digit
al Il bottom) is connected. An A/D converter 13 that converts an analog signal into a digital signal is connected to the digital interface section 12. As a result, when the audio signal is a digital signal, the audio signal is directly input to the digital interface unit 12, and when the audio signal is an analog signal, the audio signal is input indirectly via the A/D converter 13. It is now possible to do so.

On the other hand, a digital interface unit 14 (Digital I/F) is connected to the output side of the DSPlo, which converts the audio signal output from the DsPlo into the original signal format. A D/A converter I5 is connected to convert the signal into an analog signal. As a result, the audio signal processed by the DSPIO is transferred to the digital interface unit 1.
4 and a D/A converter 15 to output it as a digital signal or an analog signal.

In the above configuration, when using the sound field control device, first, a specific memory card 3 having desired sound field data is selected, and this memory card 3 is inserted into the data input section 2. As a result, the sound field data stored in the memory 4 is transmitted to the interfunice section 17 via the output terminal section 5 and the input terminal section 16.

After converting the above-mentioned sound field data into a signal output suitable for transmitting to the processing device main body 1, the inter-finis section 17 transmits the Odaiba data to the processing device main body 1. The processing device main body 1 to which this sound field data has been transmitted receives the sound field data with the CPU 6 and determines the content of the sound field data. And C.P.
U6 sends calculation algorithms and various parameters required for simulating a specific sound field to DSP 10, and
performs signal processing on the acoustic signal input via the digital interface section 12.

The above-mentioned abutment signal includes an analog signal and a digital signal. In the case of a digital signal, it is input directly to the digital interface unit 12, while in the case of an analog signal, it is input to the A/D converter 13. It is input after being converted to a digital signal.

The pass/fail signal is converted by the digital interface unit 12 into a signal format compatible with DSPIO, and then transmitted to the DSP 10. This allows the DSPIO
In this case, digital audio signals are constantly input manually.

The DSPIO that has received the above acoustic signal processes the pass/fail signal based on the sound field data transmitted from the CPU 6. Next, the processed acoustic signal is outputted as a digital signal via the digital interface section 14 or outputted as an analog signal via the D/A converter 15. The output acoustic signal has reflected sound components and transmission characteristics added to it, and has the same sense of presence and lingering sound as if it were output in a specific sound field. .

In this way, the sound field control device according to this embodiment has an external storage medium in the form of a card as the memory card 3. At this time, the sound field is determined by the sound field data stored in the memory card 3.
It can be attached to and detached from the processing device main body 1 via the data input section 2 . Therefore, the type of sound field can be determined from the information stored in the processing device main body 1! It becomes possible to prepare a very large number of types of memory cards 3 without being limited by the storage capacity of the medium. This allows the sound field control device to provide a sound field that meets the wishes of all users.

Furthermore, the memory card 3 having each sound field data allows each user to arbitrarily select only the desired sound field. Thereby, the sound field control device can select many sound fields without increasing the storage capacity within the processing device main body 1, thereby reducing the economic burden on the user. Further, setting the sound field is extremely simple because it is only necessary to fit the memory card 3 into the data input section 2.

〔Effect of the invention〕

As described above, the signal processing device for sound field reproduction according to the present invention includes a processing device main body that processes an acoustic signal based on sound field data, a memory card having the above-mentioned sound field data, and a memory card in which the memory card is removably attached. This is possible, and is configured to include a data input section that transmits sound field data from the memory card to the main body of the processing device.

As a result, the memory card containing sound field data and the processing device main body are separated, making it possible to increase the number of sound field types using only the memory card without being limited by the processing device main body. , it becomes possible to select only the sound field desired by the user using a memory card, and it becomes possible to reduce the economic burden on the user.

Furthermore, the sound field can be set by simply inserting a memory card into the data input section, resulting in an extremely simple operation procedure.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention, and is a block explanatory diagram configuring a signal processing device for sound field reproduction. 1 is a processing device main body, 2 is a data input section, 3 is a memory card, 6 is a CPU, 10 is a DSP, and 17 is an interface section.

Claims (1)

[Claims] 1. A processing device main body that processes an acoustic signal based on sound field data, and a memory card having the sound field data;
A signal processing device for sound field reproduction, characterized in that the memory card is removable and comprises a data input section for transmitting sound field data from the memory card to the main body of the processing device.