Motion estimation device, motion estimation method, motion estimation integrated circuit, and picture coding device

Abstract

Provided is a motion estimation device in which an amount of pixel data transferred from an external frame memory to an internal reference local memory is reduced. By the motion estimation device, it is possible to reduce a memory capacity and a size or processing of a circuit controlling the pixel transfer. In a reference memory control unit and an internal reference memory, a height of a area to be updated is set to L pixels, where L is power of 2, a logical address segments, whose size is suitable for address calculation, are allocated to picture space, and FIFO management is performs. In another application, an assistance memory is added, and another element other than the assistance memory performs the FIFO management for rectangular areas in an image of a conventional width. As a result, the address calculation is simplified, which makes it possible to reduce an embedded circuit for the reference memory control unit and the internal reference memory.

Description

technical field [0001] The present invention relates to a motion detection device, a motion detection method, a motion detection integrated circuit, and an image encoding device for detecting motion of blocks constituting an image. Background technique [0002] In recent years, the multimedia era of comprehensive processing of sound, image and other pixel values ​​has ushered in, and the means of transmitting information from the past information media, such as newspapers, magazines, TV, radio broadcasts, telephones, etc., to people has been proposed as multimedia Object. Generally, the so-called "multimedia" not only displays text, but also associates graphics, sounds, and especially images. However, if the above-mentioned past information media is to be used as a multimedia object, it is necessary to express its information in digital form. [0003] However, if the amount of information that the above-mentioned various information media have is estimated by the amount of ...

AI Technical Summary

Problems solved by technology

[0046] So, in progress Figure 7 In the case of pixel transfer near the circle mark in (c), the address does not match in the part that straddles the area HLA, and data access cannot be performed with a general raster address.

Also, since the horizontal position across the 0 address depends on the vertical position, it cannot be uniquely determined, and address calculation is more difficult.

[0047] As described above, in the local memory 811 for reference, when it is necessary to perform FIFO management on the physical address of the area composed of a combination of rectangular areas, the address is reused at the unfilled pixel space position, so it is very easy Difficult to handle, requiring not only multiplication operations, but also a lot of division operations and remainder calculations

Therefore, the result of requiring complex address calculations has the following problems: in the case of hardware installation, the circuit area increases, or the operation timing around the processing frequency is strict, and on the other hand, in the case of software installation, a huge amount of time is required. Processing cycles

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