Image coding device and method of image coding
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsYoshihisa Yamada, Okikazu Tanno, Kohtaro Asai, Tokumichi Murakami
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Abstract
The input image controller reduces the frame rate of a motion image signal as a preprocessing, provides process information indicating the skipped frames and/or skipped fields to the image coder, wherein the image coder codes, by use of the MPEG 2 method, the motion image signal whose frame rate has been reduced, and outputs the data which is in conformity with the MPEG 2 method and includes overhead information on the basis of the process information.
Claims17
An image coding device for coding a motion image signal, and outputting the coded data as a bit stream, said image coding device comprising:
- an input image controller that executes a predetermined processing to an input motion image signal for reducing the amount of coded data when coding the motion image signal by a coding method in which it is prescribed that the frame rate of a motion image signal is set to a constant level to be output at its decoding time, and outputs the processed motion image signal, together with the process information indicating the detail of said processing, and an image coder for coding the motion image signal processed at said input image controller into a data in conformity with said coding method on the basis of said process information.
A method of image coding for coding a motion image signal and outputting the thus coded data as a bit stream, said method comprising the steps of:
- executing a predetermined processing to an input motion image signal for reducing the amount of coded data when coding the motion image signal by a coding method in which it is prescribed that the frame rate of a motion image signal is set to a constant level to be output at its decoding time, and outputting the processed motion image signal, together with the process information indicating the detail of said processing, and
- coding the motion image signal processed at said input image controller into a data in conformity with said coding method on the basis of said process information.
An image coding device for coding a motion image signal and outputting the thus coded data as a bit stream, said device comprising:
- an input image controller which, in the case where the motion image signal is of the interlace mode, equalizes two fields of each frame at a predetermined rate, and outputs the thus processed motion image signal, and
- an image coder that codes the motion image signal processed at said input image controller by a decoding method which is in conformity with a method that is designed for outputting a motion image signal at a constant frame rate.
Dependencies are inferred from the claim text.