JP3731621B2 - Arithmetic apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an arithmetic device and method, and for example, outputs data for controlling a multiplier memory for storing a multiplier for performing a product-sum operation with an input multiplicand, and inputs data for controlling the multiplier memory from the outside. The present invention relates to an arithmetic device and method capable of performing the above.
[0002]
[Prior art]
FIG. 4 is a block diagram showing a configuration of an example of a conventional product-sum operation circuit. The multiplier memory 2 stores a predetermined multiplier in advance at the time of initialization. The multiplicand input from the input terminal 6 is supplied to the multiplicand register group 4 and also to the address control unit 1. Based on the multiplicand supplied from the input terminal 6, the address control unit 1 classifies the multiplicand input from the input terminal 6 by, for example, ADRC (Adaptive Dynamic Range Coding), and controls signals corresponding to the class. Is supplied to the multiplier memory 2, and a multiplier to be output by the multiplier memory 2 is selected.
[0003]
The multiplier selected by the address control unit 1 and the multiplicand supplied from the multiplicand register group 4 are subjected to a product-sum operation in the product-sum unit 3, and the operation result is output from the output terminal 7. This product-sum operation circuit can be configured by, for example, an IC (Integrated Circuit) or the like.
[0004]
[Problems to be solved by the invention]
However, in the conventional product-sum operation circuit, the scale of the hardware of the multiplier memory 2 and the product-sum unit 3 is larger than the other parts. For example, when the scale of the hardware is limited, There was a problem that the scale of the address control unit 1 had to be limited to a small size.
[0005]
Further, there is a problem that it is impossible to control a multiplier memory included in another product-sum operation circuit.
[0006]
The present invention has been made in view of such a situation, and makes it possible to control a multiplier memory from the outside and to output data for controlling the multiplier memory to the outside. is there.
[0007]
[Means for Solving the Problems]
The arithmetic device according to claim 1 is data for designating a multiplier stored in a multiplier memory, outputs the data supplied from the control unit to the outside, and is a multiplier stored in the multiplier memory from the outside . Input / output means for inputting data for designating, data from the control unit, and selection means for selectively supplying any one of the data input from the outside to the multiplier memory, the multiplier memory comprising: selection means Based on the data supplied via, a predetermined multiplier is supplied to the product-sum calculator .
[0008]
The calculation method according to claim 3 is data for designating a multiplier stored in the multiplier memory, and outputs the data supplied from the control unit to the outside and also stores the multiplier stored in the multiplier memory from the outside. Is input, and either the data from the control unit or the data input from the outside is selected, and based on the selected data, a predetermined multiplier is multiplied from the multiplier memory by the product-sum operation unit It is characterized by supplying to.
[0009]
The arithmetic device according to claim 4 is data for designating a multiplier stored in the multiplier memory, outputs the data supplied from the control unit to the outside, and is a multiplier stored in the multiplier memory from the outside. The multiplier memory is characterized in that a predetermined multiplier is supplied to the product-sum calculator based on the data input from the input / output means.
[0010]
The calculation method according to claim 5 is data for designating a multiplier stored in a multiplier memory, outputs the data supplied from the control unit to the outside, and is a multiplier stored in the multiplier memory from the outside. Is input, and based on the input data, a predetermined multiplier is supplied from the multiplier memory to the product-sum calculator.
[0011]
In the arithmetic device according to claim 1, the data specifying the multiplier stored in the multiplier memory, the data supplied from the control unit is output to the outside and stored in the multiplier memory from the outside. The data specifying the multiplier to be input is input, and either the data from the control unit or the data input from the outside is selectively supplied to the multiplier memory. Based on the data supplied to the multiplier memory, the multiplier A predetermined one is supplied to the product-sum calculator.
[0012]
According to a third aspect of the present invention, there is provided a calculation method for specifying a multiplier stored in a multiplier memory, wherein the data supplied from the control unit is output to the outside and stored in the multiplier memory from the outside. The data specifying the current multiplier is input, either the data from the control unit or the data input from the outside is selected, and based on the selected data, a predetermined multiplier is summed from the multiplier memory Supplied to the computing unit.
[0013]
According to a fourth aspect of the present invention, the data specifying the multiplier stored in the multiplier memory is output to the outside and stored in the multiplier memory from the outside. Data for designating a given multiplier is input, and a predetermined multiplier is supplied from the multiplier memory to the product-sum calculator based on the input data.
[0014]
The calculation method according to claim 5 is data for designating a multiplier stored in the multiplier memory, wherein the data supplied from the control unit is output to the outside and stored in the multiplier memory from the outside. Data specifying a multiplier is input, and a predetermined multiplier is supplied from the multiplier memory to the product-sum calculator based on the input data.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a configuration example of a product-sum operation circuit to which the operation device of the present invention is applied. The multiplier memory 2 stores a predetermined multiplier in advance. The address control unit 1 generates an index for designating a predetermined multiplier stored in the multiplier memory 2 based on the multiplicand input from the input terminal 6, and passes through a multiplexer (MUX) 11 (selection unit) described later. Thus, the multiplier memory 2 is supplied.
[0016]
The multiplicand register group 4 stores the multiplicand input from the input terminal 6. The product-sum unit 3 performs a product-sum operation on the multiplier supplied from the multiplier memory 2 and the multiplicand supplied from the multiplicand register group 4, and outputs the calculation result from the output terminal 7.
[0017]
The multiplexer 11 receives external data supplied from the input / output terminal 12 (input / output means, output means, input means) and the address control unit 1 based on the control signal input from the control signal input terminal 13. Any of the data to be processed is selectively supplied to the multiplier memory 2.
[0018]
Next, the operation will be described. When multiplicands are input from the input terminal 6, they are supplied to the multiplicand register group 4, stored, and also supplied to the address control unit 1. The address control unit 1 performs class classification based on, for example, ADRC (Adaptive Dynamic Range Coding) based on the multiplicand supplied from the input terminal 6, and based on the class, the multiplier stored in the multiplier memory 2 An index (for example, 5 bits) for instructing to supply the predetermined one to the multiplier / summer 3 is generated and supplied to the multiplexer 11.
[0019]
At this time, a control signal for instructing to supply the multiplier memory 2 with the data (index) supplied from the address control unit 1 is input to the multiplexer 11 from the control signal input terminal 13. The multiplexer 11 selectively supplies data (index) supplied from the address control unit 1 to the multiplier memory 2 in accordance with this control signal.
[0020]
The multiplier memory 2 supplies a predetermined multiplier to the product-sum multiplier 3 according to the index supplied from the address control unit 1 via the multiplexer 11. The multiplicand register group 4 supplies the data input from the input terminal 6 to the product-sum multiplier 3. The product-sum unit 3 performs a predetermined product-sum operation using the multiplier supplied from the multiplier memory 2 and the multiplicand supplied from the multiplicand register group 4, and outputs the calculation result from the output terminal 7.
[0021]
In this way, the multiplier memory 2 is controlled according to the index generated by the address control unit 1, and a product-sum operation is performed.
[0022]
By the way, the index output from the address control unit 1 can be output from the input / output terminal 12. For example, as shown in FIG. 2, the product-sum operation circuit 101 and the product-sum operation circuit 201 are connected to the input-output terminal 12 of the product-sum operation circuit 101 and the input-output terminal 22 of the product-sum operation circuit 201. Can do. The product-sum operation circuit 101 and the product-sum operation circuit 202 can be connected to the input / output terminal 12 of the product-sum operation circuit 101 and the input / output terminal 25 of the product-sum operation circuit 202. Here, the configuration and operation of the product-sum operation circuits 201 and 202 are basically the same as those of the product-sum operation circuit 101.
[0023]
Therefore, the index generated by the address control unit 1 of the product-sum operation circuit 101 and output from the input / output terminal 12 is transferred from the input / output terminal 22 of the product-sum operation circuit 201 to the multiplier memory built in the product-sum operation circuit 201. And a predetermined multiplier is supplied to a built-in multiplier. Similarly, an index generated by the address control unit 1 of the product-sum operation circuit 101 and output from the input / output terminal 12 is sent from the input / output terminal 25 of the product-sum operation circuit 202 to a multiplier memory built in the product-sum operation circuit 202. And a predetermined multiplier is supplied to a built-in multiplier.
[0024]
In this way, by allowing the address control unit 1 to output an index, it is possible to connect and control other product-sum operation circuits having different address control units.
[0025]
Next, as shown in FIG. 3, the external address control circuit 301 is connected to the input / output terminal 12 of the product-sum operation circuit 101, and an index for controlling the multiplier memory 2 is supplied from the external address control circuit 301. explain.
[0026]
First, a case where only the external address control circuit 301 generates an index for controlling the multiplier memory 2 will be described. The external address control circuit 301 performs class classification by ADRC and generates, for example, a 5-bit index. Next, class classification based on motion information is performed from the difference between frames, and a 2-bit index is generated. Furthermore, class classification is performed based on the correlation of the input signal to generate a 2-bit index.
[0027]
Then, these indexes are converted into a 5-bit final index by the degenerate ROM and supplied to the multiplexer 11 via the input / output terminal 12. The control signal input terminal 13 is supplied with a control signal instructing to supply the data input from the input / output terminal 12 to the multiplier memory 2. As a result, the final index supplied via the input / output terminal 12 is supplied to the multiplier memory 2. The multiplier memory 2 supplies a predetermined multiplier to the multiplier / summer 3 based on the final index supplied from the input / output terminal 12, and the multiplier / summer 3 performs a product-sum operation on the multiplier and the input data. . In this way, the product-sum operation circuit 101 can be controlled from the outside.
[0028]
Next, a case where the multiplier memory 2 is controlled based on the index supplied from the external address control circuit 301 to the input / output terminal 12 and the index generated by the address control unit 1 will be described.
[0029]
First, the address control unit 1 performs class classification by ADRC, generates a 5-bit index, for example, based on the class, and supplies the generated index to the multiplexer 11. Next, the external address control circuit 301 first performs class classification based on motion information from the difference between frames to generate, for example, a 1-bit index. Furthermore, classification is performed based on the correlation of the input signal, and for example, a 1-bit index is generated. Then, it is supplied to the address control unit 1 via the input / output terminal 12.
[0030]
The address control unit 1 mixes the upper 3 bits of the index generated by the address control unit 1 with the 2-bit index supplied from the external address control circuit 301 via the input / output terminal 12 to generate the final index. To the multiplexer 11. The multiplexer 11 selectively supplies the final index input from the address control unit 1 to the multiplier memory 2 in accordance with the control signal input from the control signal input terminal 13. As a result, for example, the address control unit 1 generates only an index that can be generated by a relatively simple operation, and an index that requires a relatively complicated operation is an external component composed of a complicated circuit with a large hardware scale. The address control circuit 301 can be generated.
[0031]
As described above, by providing the input / output terminal 12 and the multiplexer 11 capable of inputting / outputting data between the address control unit 1 and the multiplier memory 2, the address control unit 1 controls other product-sum operation circuits. Further, the hardware scale is larger than that of the internal address control unit 1, and the multiplier memory 2 can be controlled by a complicated circuit.
[0032]
In the above embodiment, the number of bits of the index supplied to the multiplier memory 2 is 5 bits. However, the number of bits is not limited to this and can be any other number of bits.
[0033]
In the above embodiment, the two product-sum operation circuits 201 and 202 are connected to the input / output terminal 12 of the product-sum operation circuit 101. However, one or more product-sum operation circuits are connected. It is also possible to do.
[0034]
【The invention's effect】
According to the arithmetic device according to claim 1 and the arithmetic method according to claim 3 , the data specifying the multiplier stored in the multiplier memory, the data supplied from the control unit is output to the outside. At the same time, data specifying the multiplier stored in the multiplier memory is input from the outside, and either the data from the control unit or the data input from the outside is selected, and the multiplier is based on the selected data. Is supplied from the multiplier memory to the product-sum operation unit, so that other product-sum operation units having different address control units are connected and controlled, and the internal address connected to the outside is controlled. The hardware scale is larger than that of the control unit, and the multiplier memory can be controlled by a complicated circuit.
[0036]
According to the arithmetic device according to claim 4 and the arithmetic method according to claim 5, the data specifying the multiplier stored in the multiplier memory, the data supplied from the control unit is output to the outside. At the same time, data specifying a multiplier stored in the multiplier memory is input from the outside, and based on the input data, a predetermined multiplier is supplied from the multiplier memory to the product-sum calculator. The hardware scale is larger than that of the internal address control unit connected to the outside, and the multiplier memory can be controlled by a complicated circuit.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration example of a product-sum operation circuit to which an arithmetic device of the present invention is applied.
FIG. 2 is a diagram illustrating a state in which other product-sum operation circuits 201 and 202 are connected to the input / output terminal 12 of the product-sum operation circuit 101;
3 is a diagram showing a state in which an external address control circuit 301 is connected to the input / output terminal 12 of the product-sum operation circuit 101. FIG.
FIG. 4 is a block diagram showing a configuration of an example of a conventional product-sum operation circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Address control part, 2 multiplier memory, 3 product adder, 4 multiplicand register group, 6 input terminal, 7 output terminal, 11 multiplexer, 12 input / output terminal, 13 control signal input terminal, 101, 201, 202 multiply-add operation circuit 301 external address control circuit

Claims (5)

A multiplier memory that stores a multiplier; a control unit that controls the multiplier memory to selectively output the multiplier stored in the multiplier memory; and a product-sum that performs a product-sum operation using the input multiplicand and the multiplier In an arithmetic device comprising an arithmetic unit,
Data specifying the multiplier stored in the multiplier memory , outputting data supplied from the control unit to the outside, and data specifying the multiplier stored in the multiplier memory from the outside Input / output means for input ;
Selection means for selectively supplying either the data from the control unit or the data input from the outside to the multiplier memory;
With
The multiplier memory supplies a predetermined one of the multipliers to the product-sum calculator based on the data supplied via the selection means . The control unit generates data specifying the multiplier stored in the multiplier memory based on the data input from the input / output means ,
The arithmetic device according to claim 1, wherein the multiplier memory supplies the multiplier specified by the data generated by the control unit to the product-sum calculator . A multiplier memory that stores a multiplier; a control unit that controls the multiplier memory to selectively output the multiplier stored in the multiplier memory; and a product-sum that performs a product-sum operation using the input multiplicand and the multiplier In an arithmetic method in an arithmetic device comprising an arithmetic unit,
Data specifying the multiplier stored in the multiplier memory , outputting data supplied from the control unit to the outside, and data specifying the multiplier stored in the multiplier memory from the outside enter,
Select one of the data from the control unit and the data input from the outside,
A calculation method comprising: supplying a predetermined one of the multipliers from the multiplier memory to the product-sum calculator based on the selected data . A multiplier memory that stores a multiplier; a control unit that controls the multiplier memory to selectively output the multiplier stored in the multiplier memory; and a product-sum that performs a product-sum operation using the input multiplicand and the multiplier In an arithmetic device comprising an arithmetic unit,
Data specifying the multiplier stored in the multiplier memory, outputting data supplied from the control unit to the outside, and data specifying the multiplier stored in the multiplier memory from the outside Input / output means to input
With
The multiplier memory supplies a predetermined one of the multipliers to the product-sum calculator based on data input from the input / output means.
An arithmetic device characterized by that. A multiplier memory that stores a multiplier; a control unit that controls the multiplier memory to selectively output the multiplier stored in the multiplier memory; and a product-sum that performs a product-sum operation using the input multiplicand and the multiplier In an arithmetic method in an arithmetic device comprising an arithmetic unit,
Data specifying the multiplier stored in the multiplier memory, outputting data supplied from the control unit to the outside, and data specifying the multiplier stored in the multiplier memory from the outside Input,
Based on the input data, a predetermined multiplier is supplied from the multiplier memory to the product-sum calculator.
An arithmetic method characterized by the above.

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