Video system conversion method and conversion device in ultrasonic imaging equipment

Abstract

The invention provides a video system conversion method in ultrasonic imaging equipment, which includes: producing VGA (video graphic array) time sequence and address information, converting VGA time sequence signals to non-standard VGA time sequence signals, converting VGA digital video signals into simulation signals to be output, writing the address information into an external storage unit, loading standard PAL (programmable array logic) address information into the external storage unit, acquiring PAL digital video data generated by the external storage unit by reading the external storage unit, combining with the PAL time sequence, overlapping the PAL digital video data on the standard PAL time sequence waveform to generate PAL system video signals and outputting the PAL system video signals to the outside. The video system conversion method is capable of extracting original VGA data directly without interpolation zoom, PAL image display effect is excellent, particularly the bottom and the top of an image are displayed well, cached data quantity is reduced greatly, external storage units are omitted, and cost is saved. Meanwhile, a conversion device utilizing the video system conversion method also has the above advantages.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging equipment, in particular to a method and device for converting video formats in ultrasonic imaging equipment. Background technique [0002] At present, the display part of medical ultrasound imaging equipment usually includes three display methods: CRT (cathode ray tube display, hereinafter referred to as CRT) display, LCD (liquid crystal display, hereinafter referred to as LCD) display and Video video display. CRT display uses video graphics array signal (hereinafter referred to as VGA signal), general LCD display uses LVDS (Low-Voltage Differential Signaling, low voltage differential signal, hereinafter referred to as LVDS) signal drive, and Video display system supports analog TV Signal. [0003] In the field of B-ultrasound applications, the video signal of the phase-inverted-line system (hereinafter referred to as the PAL system) is mainly used for the input of the video printer, ...

AI Technical Summary

Problems solved by technology

[0006] There are generally two types of problems in the above methods used in current ultrasound imaging equipment: one is that the image effect after conversion is not good due to the great difference between VGA timing and PAL timing Ideal, especially the top and bottom of the image; second, the algorithm required for the conversion is complex, the hardware requirements are high, and SRAM is required as a cache, and the cost is relatively high

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