Video noise reduction apparatus and method using three dimensional discrete cosine transforms and noise measurement
Номер патента: CA2118978A1
Опубликовано: 19-09-1994
Автор(ы): Jimmy C. Tran, Saiprasad V. Naimpally
Принадлежит: Individual
Опубликовано: 19-09-1994
Автор(ы): Jimmy C. Tran, Saiprasad V. Naimpally
Принадлежит: Individual
Реферат: ABSTRACT A noise component of a video signal is reduced by using a three dimensional discrete cosign transform (3-D DCT) to determine the time frequency spectrum of both the video signal and the noise component, subtracting the time frequency spectrum of the noise component from the time frequency spectrum of the video signal, and converting the time frequency spectrum of the modified video signal back to the spatial time domain by using an inverse 3-D DCT.
MPEG picture processing apparatus and data transferring method using the apparatus
Номер патента: US20020003839A1. Автор: Akihiko Takabatake,Ryohei Okawahara. Владелец: Mitsubishi Electric Corp. Дата публикации: 2002-01-10.