摘要:
It is an object of the present invention to realize bypass of input data in a macro-cell such as a FIFO memory etc. to facilitate test and evaluation about other macro-cells. A bypass route (6) is provided between an input port (DI) and an output port (DO) in a FIFO memory (1) and a data bypassing selector (8) is further provided for selecting the bypass route (6) and a sense amplifier (7) of a read bit line (R.BL). Then, in the test mode, a first selector control signal (S) is set to an L level and a second selector control signal (S) of opposite phase is set to an H level. Thus, in the test mode, a data inputted from the input port (DI) is outputted from the output port (DO) by way of the bypass route (6) without via memory cells (MC1-MCX).
摘要翻译:本发明的目的是实现诸如FIFO存储器等的宏小区中的输入数据的旁路,以便于关于其他宏小区的测试和评估。 旁路路径(6)设置在FIFO存储器(1)中的输入端口(DI)和输出端口(DO)之间,并且数据旁路选择器(8)还被设置用于选择旁路路径(6)和 读位线(RBL)的读出放大器(7)。 然后,在测试模式中,将第一选择器控制信号(S)设置为L电平,将相反相位的第二选择器控制信号(+ E,ovs S + EE)设置为H电平。 因此,在测试模式中,从输入端口(DI)输入的数据通过旁路路径(6)从输出端口(DO)输出,而不经由存储单元(MC1-MCX)输出。
摘要:
To provide an image compression coding apparatus and method capable of minimizing a deterioration in picture quality which is caused on a reproduced image during an overflow of an output buffer. A picture top detector (7A) executes a picture top detection processing for discarding image compression data (S2) until a top of a picture of the image compression data (S2) is detected during detection of a start address, and restarts a normal operation after detecting the top of the picture. A processor (5) brings a detection start register (8) into a set state and causes the picture top detector (7A) to execute the picture top detection processing during an overflow of an output buffer (3a), and executes an interruption processing of rewriting, as a value of a write address register (9), an address where a top of an overflow picture to be a picture causing the overflow is stored.
摘要:
Element processors (PE00 to PE33) included in a processor array (7) store pixel values of a search window, shifting them forward. Further, only hatched element processors (PE00, PE02, PE11, PE13, PE20, PE22, PE31, PE33) store pixel values of a template block, and compare them with the pixel values in the search to evaluate a similarity of pixel values. In other words, the pixel values of the template block are skipped and the pixel values which are left after skipping are compared. Therefore, it is possible to cut a hardware volume.
摘要:
An evaluation value operation part computes evaluation values of a template block and a search window block in accordance with respective ones of a plurality of predictive modes in parallel with each other, and a candidate vector determination part decides candidate vectors indicating optimum vectors in accordance with the computed evaluation values and on the basis of priority levels from a priority generation part. In accordance with these candidate vectors, an optimum vector decision part decides the optimum vectors for the respective predictive modes. Thus provided is an image coding system which can reduce the amount of codes of motion vectors with excellent picture quality.
摘要:
The control circuit controls output of template block data held in the input section such that a plurality of operation units within the operation section are provided with data of unadjacent template blocks that are different from each other. The operation units within the operation section detect motion vectors according to the template block data provided thereto. Thus, motion vector detection in the template blocks except for those in a region on a display screen requiring no motion vector detection is distributed in the plurality of operation units. Accordingly, the motion vector search can be performed in a wider range in a vertical or horizontal direction than in the conventional case within the same operation time.
摘要:
Disclosed is an image coding method and apparatus for preventing a coding quantity of coding data from being increased when a redundancy between image planes is low. A selector outputs either an optimum motion vector output from a motion vector detecting device or a motion vector output from a motion vector storing section to a real time image coding device for performing coding on the basis of an evaluation value output from the motion vector detecting device. If it is decided, according to the evaluation value, that a redundancy between a reference image plane and a coding object image plane is low, the motion vector is selected so that the coding quantity of the coding data can be prevented from being increased.
摘要:
Each of element processors arranged in correspondence to pixels of a template block and a search window block respectively includes an A register and a B register provided in parallel with each other for storing search window block pixel data respectively, and a T register for storing template block pixel data. Motion vector evaluation value calculation is performed through a first one of the A and B registers and the pixel data stored in the T register, while operated data is transferred to the second one of the A and B registers from the first one of the A and B registers in parallel with the calculation operation, for storing head search window block pixel data of a next search window. A motion vector is detected at a high speed in excellent coding efficiency.
摘要:
In order to generate zigzag addresses for Discrete Cosine Transformation DCT data arranged in the form of a square matrix, row differentials (.DELTA.y) and column differentials (.DELTA.x) being differentials of row addresses (y) and column addresses (x) are previously stored to be successively read out (steps S12 and S13). The row differentials (.DELTA.y) and the column differentials (.DELTA.x) are added to the row addresses (y) and the column addresses (x) respectively, to newly obtain zigzag addresses (steps S14 and S15). Thus, the amount data to be stored can be reduced. Further, it is possible to further reduce the amount of data to be stored by compressing data through regularity of the row differentials (.DELTA.y) and the column differentials (.DELTA.x).
摘要:
When the CPU writes data into a memory, a 0 detection circuit detects the number of bits having the value 0 from the data. When the number of bits with 0 is equal to or larger than the number of bits with 1, the data output from the CPU is provided to the memory under control of a selector. When the number of bits with 0 is fewer than the number of bits with 1, the data output from the CPU is inverted and provided to the memory under control of the selector. Accordingly, the rewriting frequency of each memory cell from 0 to 1 or from 1 to 0 in the memory can be reduced in average. Thus the power consumption of the memory in a data writing mode can be reduced.
摘要:
A plurality of motion detecting units of which at least a template block size, i.e., the number of estimation pixels, or a search area size is different among the motion detecting units are used adaptively according to the characteristic of, or the prediction coding type of, a target picture. This enables efficient motion vector detection to be accomplished without increasing the amount of hardware or power consumption.