JP4265650B2 - Data processing apparatus and image device - Google Patents

Description

  The present invention relates to a data processing apparatus in which a sound source device and an image device share a memory, and a sound source device and an image device used in the data processing apparatus.

  In a game machine such as a pachinko machine, an image device for processing image data and a sound source device for processing musical sound data are processed independently as data processing devices for reproducing image content data and sound content data. What was comprised has been used widely (for example, refer patent document 1 and patent document 2).

For the purpose of reducing the cost of such a data processing apparatus, the applicant has proposed a data processing apparatus configured to share a memory between an image device and a sound source device as Japanese Patent Application No. 2006-5987. . In this shared memory type data processing apparatus, image data and musical sound data are stored in the shared memory, and the image device is responsible for reading data from the shared memory and reading and processing the image data. In response to this request, the musical sound data is also read out, and the read musical sound data is supplied from the image device to the sound source device.
JP 2004-233747 A JP 2004-233748 A

  However, in such a data processing device, even when the sound source device tries to read continuous musical sound data from the shared memory, the image device does not know the amount of data that the sound source device is trying to read. Reading of musical sound data could not be performed at high speed. For this reason, it takes time to read out the musical sound data, which degrades the reproduction quality of the sound content, and also delays the reading of the image data, resulting in a deterioration in the reproduction quality of the image content.

  The present invention has been made in view of the above points, and an object of the present invention is to allow the image device to read data requested by the sound source device from the memory at high speed in a data processing apparatus in which the sound source device and the image device share the memory. Is to make it possible.

The present invention has been made to solve the above-described problems, and is a sound source device that processes musical sound data, an image device that processes image data, and data reading controlled by the image device, and the musical sound data and And a memory for storing the image data, wherein the tone generator device issues a tone data read request including read data amount information for designating a data amount of tone data to be read from the memory. The image device operates in either a first read mode for continuously reading data from the memory or a second read mode for reading data from the memory in a predetermined read unit; While the image data is being read from the memory, the musical sound data read request is issued. When signals, in preference to reading of the image data, indicated by the read data amount information by switching the first or second read mode in response to the received read data amount information of the musical sound data read request It reads tone data of the data volume from the previous SL memory, and transmits the read music data to the sound source device.

According to the present invention, the sound source device notifies the image device of the amount of data to be read from the memory, so that the image device continuously reads the notified data amount of data from the memory. Therefore, the image device can read out the data requested by the sound source device from the memory at high speed.
In addition, according to the present invention, it is possible to read out musical sound data not only in continuous reading but also in a predetermined reading unit (every word).

  In the data processing apparatus, the amount of data specified in the read data amount information is variable.

  According to this invention, the sound source device can variably specify the amount of data read from the memory. Therefore, by setting the data amount to an appropriate value according to the characteristics of the musical sound data and image data read out from the memory and played back, the data processing device can be optimally maintained while balancing the playback quality of the sound and the image. Can be operated.

  In the data processing apparatus, the unit of data to be transmitted from the sound source device to the image device is M bits (M is an integer of 1 or more), and an address for designating musical sound data to be read from the memory by the sound source device. The address length is m bits (m is an integer, where 1 ≦ m <M), and the read data amount information is n bits (n is an integer, where 1 ≦ n ≦ M−m), and the sound source device Transmits the data including the address and the read data amount information as the musical sound data read request.

  According to the present invention, the read data amount information can be transmitted using the empty bits at the time of address transmission.

In addition, the present invention processes image data read from an external memory, and receives a request from a sound source device that processes musical sound data, reads the musical sound data from the external memory, and supplies the musical sound data to the sound source device The musical sound that operates in either the first read mode in which data is continuously read from the external memory or the second read mode in which data is read from the external memory in a predetermined read unit and is read from the external memory. When a musical tone data read request from the sound source device including read data amount information for designating the data amount of data is received during reading of image data from the external memory, priority is given to reading of the image data. Te, before according to the received read data amount information of the musical sound data read request By switching the first or second read mode, wherein the reading data amount of musical data indicated by the read data amount information from the previous SL external memory.

  According to the present invention, the sound source device notifies the image device of the amount of data to be read from the memory, and the image device continuously reads the data of the notified data amount from the memory. The image device can read the data from the memory at high speed. As a result, sound and image content can be reproduced with good quality in a data processing apparatus in which a sound source device and an image device share a memory.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a block diagram of a data processing apparatus according to an embodiment of the present invention. In FIG. 1, the data processing apparatus 1 has a host CPU 2, a sound source device 3, an image device 4, and a memory 5.

  The host CPU 2 is a central processing unit that controls the operation of each unit of the data processing apparatus 1. Specifically, the host CPU 2 instructs the sound source device 3 and the image device 4 to reproduce content data. As the content data, there are musical tone data for generating a sound and image data for displaying an image. The musical tone data and the image data are stored in the memory 5.

  The sound source device 3 reads out musical tone data from the memory 5 based on an instruction from the host CPU 2, generates a musical tone signal for driving the speaker 7 by performing predetermined processing on the read musical tone data, and generates the generated musical tone signal. Supply to the speaker 7. Here, the reading of the musical sound data from the memory 5 is performed via the image device 4 (the memory interface 13 thereof), details of which will be described later.

  If the musical sound data is compressed data such as MP3 (MPEG (Moving Picture Experts Group) Audio Layer-3), the musical sound signal is obtained by performing a decompression process on the read musical sound data as the predetermined process. Generate. Further, when the musical sound data is MIDI (Musical Instruments Digital Interface) sequence data, the read sequence data is interpreted, and the sound source data built in the sound source device 3 is read according to the result, and the speaker 7 is obtained as a musical sound signal. To supply.

  The image device 4 reads out and reproduces image data from the memory 5, receives musical tone data from the memory 5 in response to a request from the sound source device 3, and supplies it to the sound source device 3. As a specific configuration, the image device 4 includes a host interface (host I / F) 11, an image processing unit 12, and a memory interface (memory I / F) 13 as shown in FIG. 1. ing.

  The host interface 11 controls data input / output with the host CPU 2, and transfers an image content reproduction command from the host CPU 2 to the image processing unit 12. The image processing unit 12 receives this reproduction command, determines an address indicating a storage location of image data to be read from the memory 5, and supplies the address data to the memory interface 13. The memory interface 13 transfers the supplied address data to the memory 5 to read image data designated by the address data from the memory 5 and transfers the read image data to the image processing unit 12. The image processing unit 12 performs predetermined processing on the image data acquired in this way, and supplies the resulting image signal to the display device 6, thereby causing the display device 6 to display an image.

  The memory interface 13 further receives a tone data read request from the tone generator device 3. The memory interface 13 reads the musical sound data from the address of the memory 5 designated in the read request, and transfers the read musical sound data to the tone generator device 3. Here, in the read mode in which the memory interface 13 reads out the musical sound data from the memory 5, as will be described next (FIGS. 2 and 3), one word (one read) for each read request (address designation). There are a random access mode in which data is read out in units) and a continuous access mode in which a plurality of data of a predetermined number (predetermined words) following a specified address are read continuously by one read request. The sound source device 3 designates which mode is read and how many words are read continuously in the continuous access mode.

  FIG. 2 is a data structure diagram showing address data for designating the storage location of the tone data to be read, which is transmitted to the image device 4 (memory interface 13) when the tone generator device 3 reads the tone data from the memory 5. is there. Note that the address of the musical tone data is designated by a 26-bit relative address.

  In FIG. 2, the 0th to 11th bits are the lower address L-ADR, the 12th to 13th bits are empty (value is 0), and the 14th to 15th bits are the mode designation data PM. The 16th to 29th bits are the higher address H-ADR, and the 30th to 31st bits are empty (value is 0). Here, it is assumed that the width of the bus for transmitting the address data is 16 bits. At this time, the address data of FIG. 2 is transmitted separately into 0th to 15th bit data and 16th to 31st bit data.

  The mode designation data PM is 2-bit data for designating the tone data read mode. As shown in the figure, PM = 0 designates the random access mode, and PM = 1 reads 80 words continuously. The continuous access mode is designated, and PM = 2 designates the continuous access mode in which 160 words are read continuously. Note that PM = 3 is unused here.

  In this way, by using the data structure of FIG. 2, a mode for designating the tone data read mode and the number of words to be read continuously using empty bits (14th to 15th bits) at the time of address data transmission is used. The designated data PM can be transmitted. In addition, since three reading modes can be selected by the mode designation data PM, the setting is made so that the reproduction quality of the sound and image content is balanced in accordance with the characteristics of the musical sound data and the image data. It can be carried out.

  Next, the operation when the tone generator device 3 reads the musical sound data from the memory 5 will be described with reference to FIG. 3 and FIG.

  FIG. 3 is a timing chart for explaining a temporal relationship between signals input to and output from the sound source device 3. Here, a case where the mode designation data PM = 1 is designated and the continuous access mode for continuously reading 80 words is selected will be described as an example.

  The sound source device 3 first sets the signal line BUS to the high level “H” at time t1, outputs the higher address H-ADR to the data bus D, and then sets the signal line SYNC_H to the high level “H”. The memory interface 13 detects that the address will be transmitted by detecting the high level “H” of the signal line BUS, and then receives the high level “H” of the signal line SYNC_H, An upper address H-ADR is acquired.

  Next, at time t2, the sound source device 3 sets the signal line SYNC_H to the low level “L” and outputs the lower address L-ADR and the mode designation data PM to the data bus D, and then sets the signal line SYNC_L to the high level “H”. " The memory interface 13 receives the high level “H” of the signal line SYNC_L and acquires the lower address L-ADR and the mode designation data PM of the data bus D. At time t3, the tone generator device 3 stops outputting the address to the data bus D and returns the signal lines SYNC_L and BUS to the low level “L”.

  On the other hand, the memory interface 13 that has acquired the addresses H-ADR and L-ADR and the mode designation data PM sets the wait signal line WAIT to the high level “H” at time t4. While detecting that the wait signal line WAIT is at the high level “H”, the tone generator device 3 waits for data (musical sound data requested to be read) to be transmitted from the memory interface 13. Then, at time t5, the memory interface 13 sets the wait signal line WAIT to the low level “L”, reads out the musical tone data at the address acquired from the memory 5 by one word, and reads out the musical tone data data1 as data. Output to bus D.

  Next, in response to the wait signal line WAIT becoming low level “L”, the sound source device 3 acquires the musical sound data data1 on the data bus D, and then transmits the increment signal INC. The memory interface 13 receives this increment signal INC and increments the counter by 1 (assuming that the counter initially has a value of 0). The memory interface 13 stops the output to the data bus D and sets the wait signal line WAIT to the high level “H” again.

  After that, at time t6, the memory interface 13 sets the wait signal line WAIT to the low level “L”, reads out the musical tone data data2 at the next address of the read musical tone data data1 from the memory 5, and the data bus D Output to. The sound source device 3 acquires the musical sound data data2 on the data bus D in response to the wait signal line WAIT becoming low level “L”, and transmits the increment signal INC. The memory interface 13 receives this increment signal INC and increments the counter by 1 (the counter value becomes 2 at this point). Then, the output to the data bus D is stopped, and the wait signal line WAIT is set to the high level “H” again.

Thereafter, the same operation is repeated until the counter value reaches 80 (because mode designation data PM = 1).
Thus, by transmitting the mode designation data PM from the tone generator device 3 to the memory interface 13, the memory interface 13 can continuously access the musical sound data of the number of words designated by the mode designation data PM (when PM = 0). (With random access).

FIG. 4 shows a processing flow diagram of the memory interface 13.
When a tone data read request is received from the tone generator device 3 and address data is received (step S1), it is determined whether or not the image processing unit 12 is reading image data from the memory 5 (step S2). . If the image data is being read, the reading of the image data is interrupted (step S3). Next, the value of the mode designation data PM included in the address data received from the sound source device 3 is determined (step S4), and the tone data reading mode corresponding to the value is set (steps S5 to S7).

  The musical tone data is first read from the memory 5 (step S8), and it is determined whether or not the musical tone data has been read (step S9). Whether or not the reading of the musical sound data has been completed is determined according to the set reading mode. That is, when the random access mode is set in step S5, reading of the musical sound data requested by reading one word is completed, and the process proceeds to step S10. If the continuous access mode (80-word reading) is set in step S6, the process proceeds to step S8, and the processes in steps S8 to S9 are repeated until 80 words are read.

When it is determined in step S9 that the reading of the musical sound data has been completed, the reading of the image data interrupted in step S3 is resumed (step S10).
In this way, when there is a request for reading music data from the tone generator device 3, the reading process is interrupted even when the image processing unit 12 is reading the image data, and the tone data is based on the mode designation data PM. Is preferentially executed. At this time, if the continuous access mode is designated, the musical tone data of the designated number of words is read continuously. Then, after the reading of the musical sound data is completed, the reading of the image data is resumed.

  On the other hand, when there is a request for reading image data from the image processing unit 12 (step S11), it is determined in step S9 whether or not reading of the musical tone data has been completed. If the reading of the musical sound data has not been completed, the start of reading of the image data is put on standby until exiting the loop of steps S8 to S9. Then, when the reading of the musical sound data is completed, the reading of the image data is started.

  FIG. 5 is a flowchart showing a modification of the processing of the memory interface 13. Here, the image device 4 includes a temporary buffer, and the musical sound data read from the memory 5 is temporarily stored in the temporary buffer.

  Specifically, in the figure, the processing from step S21 to step S24 is performed in the same manner as the processing from step S1 to step S4 in FIG. If the random access mode is designated, the musical sound data is read out from the memory 5 by one word and stored in the temporary buffer of the image device 4 in step S25. On the other hand, if the continuous access mode (80 words) is designated, the musical tone data is read continuously from the memory 5 for 80 words and stored in the temporary buffer in step S26. If the continuous access mode (160 words) is designated, the musical tone data is read continuously from the memory 5 for 160 words and stored in the temporary buffer in step S27. The musical tone data temporarily stored in the temporary buffer in this way is then read one word at a time and transferred to the sound source device 3 at an appropriate timing.

  On the other hand, when the musical sound data reading from the memory 5 in each mode in steps S25 to S27 is completed, the reading of the image data from the memory 5 is immediately resumed (step S28).

As described above, according to the present embodiment, the mode designation data PM indicating the amount of musical sound data that the sound source device 3 reads from the memory 5 is transmitted to the image device 4, and the image device 4 transmits this mode designation data PM. Accordingly, the musical sound data of the designated data amount (80 words or 160 words) is continuously read out from the memory 5, so that the image device 4 reads out the data requested by the sound source device 3 from the memory 5 at high speed. Is possible. Thereby, in the data processing apparatus 1 in which the sound source device 3 and the image device 4 share the memory 5, it is possible to reproduce sound and image content with good quality.
Further, according to the processing of FIG. 5, since the reading of the image data can be resumed when the musical sound data is stored in the temporary buffer provided in the image device 4, the sound source device 3 and the image device 4 share the memory 5. The data processing apparatus 1 can reproduce sound and image content with better quality.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  For example, the mode designation data PM described above is an example of read data amount information in which the tone generator device 3 designates the data amount of musical sound data read from the memory 5, and the present invention is not limited to this. For example, instead of designating the read mode such as PM = 0 to 3, the amount of data to be continuously read may be directly designated as many words. Further, the sound source device 3 can appropriately change the data amount to be designated.

  Although the mode designation data PM is 2-bit data, it may be equal to or less than the number of vacant bits when transmitting the address data H-ADR and L-ADR. That is, the unit for transmitting data from the sound source device 3 to the image device 4 (the width of the data bus D) is M bits (M is an integer of 1 or more), and the address length of the address data H-ADR or L-ADR is m bits ( If m is an integer, where 1 ≦ m <M), the number of bits n of the mode designation data PM may be 1 ≦ n ≦ M−m. The mode designation data PM can include arbitrary information (information such as the number of words read continuously) within the range of n bits, and can be transmitted simultaneously with the address data.

  Further, for example, when there is a request for reading image data from the image processing unit 12 during continuous reading of 160 words of musical sound data, the memory interface 13 temporarily stops reading of the musical sound data halfway (for example, up to 80 words). The fact that reading has been completed up to that place (80 words) is stored, and after the requested image data has been read, the reading of the musical sound data may be resumed from the next place (81st word). .

It is a block diagram of the data processor by one Embodiment of this invention. It is a data structure figure of the address data which a sound source device transmits. It is a timing chart explaining the time relation of each signal inputted and outputted to a sound source device. It is a processing flow figure of a memory interface. It is a processing flow figure (modification) of a memory interface.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Data processing apparatus 2 ... Host CPU 3 ... Sound source device 4 ... Image device 5 ... Memory 6 ... Display apparatus 7 ... Speaker 11 ... Host interface 12 ... Image processing part 13 ... Memory interface

Claims (4)

In a data processing apparatus comprising: a sound source device that processes musical sound data; an image device that processes image data; and a memory that is controlled to read data by the image device and stores the musical sound data and the image data.
The sound source device transmits a musical sound data read request including read data amount information for designating a data amount of musical sound data read from the memory to the image device;
The image device operates in either a first read mode for continuously reading data from the memory or a second read mode for reading data from the memory in a predetermined read unit, and reads image data from the memory. When the musical sound data read request is received during this period, the first or second read mode is switched in accordance with the read data amount information of the received musical sound data read request prior to the reading of the image data. the data processing apparatus characterized by reading out the tone data of the data amount indicated by the read data amount information from the previous SL memory, and transmits the read music data to the sound source device.   The data processing apparatus according to claim 1, wherein a data amount designated in the read data amount information is variable. The unit of data transmitted from the sound source device to the image device is M bits (M is an integer of 1 or more),
The address length of the address that specifies the musical sound data that the sound source device reads from the memory is m bits (m is an integer, where 1 ≦ m <M),
The read data amount information is data of n bits (n is an integer, where 1 ≦ n ≦ M−m),
The sound source device, the data processing apparatus according to claim 1 or claim 2, characterized in that for transmitting data including said address and said read data amount information as the tone data read request. An image device that processes image data read from an external memory, receives a request from a sound source device that processes musical sound data, reads the musical sound data from the external memory, and supplies the musical sound data to the sound source device,
Data amount of musical sound data to be read from the external memory by operating in either the first read mode for continuously reading data from the external memory or the second read mode for reading data from the external memory in a predetermined read unit tone data reading request from the sound source device that includes a read data amount information for specifying, upon receiving from the external memory during the read image data, in preference to reading of the image data, the receiving and wherein the reading data amount of musical data indicated by the first or the read data amount information by switching the second read mode before Symbol external memory in response to the read data amount information of the musical sound data read request Image device.

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