Patent ID: 7312832

Claim:
A sub-picture image decoder for use in a language learning machine, comprising: a sub-picture buffering unit, having a first buffer and a second buffer to receive first sub-picture data and second sub-picture data respectively and temporarily store the first sub-picture data and the second sub-picture data respectively, wherein the first sub-picture data and the second sub-picture data correspond to language sub-titles of different languages; an adjustment unit, pre-stored with plural adjusting parameters, each said adjusting_parameter having at least one adjusting parameter value; a look-up table, to provide a plurality of sub-picture display formats corresponding to the first sub-picture data and the second sub-picture data to obtain a first sub-picture image and a second sub-picture image on a main picture image; an input unit, to generate an adjusting signal; and a control unit, to retrieve the adjusting parameter value corresponding to the adjusting signal from the adjustment unit, so as to adjust the first sub-picture image and the second sub-picture image based on the adjusting parameter value for displaying the first sub-picture image and the second sub-picture image at the same time and in different positions.