1808.06250 Dynamic Temporal Alignment of Speech to Lips
映画の吹き替えなどにおいて、新しく録音した音声を元の唇の動きに手動で合わせるのは面倒な作業です。そこで本論文は、動的な音声と映像間の時間整列を行えるAutomated Dialogue Replacement (ADR,自動台詞変換)のための手法を提案します。
Dynamic Temporal Alignment of Speech to Lips
(Submitted on 19 Aug 2018)
Abstract: Many speech segments in movies are re-recorded in a studio during postproduction, to compensate for poor sound quality as recorded on location. Manual alignment of the newly-recorded speech with the original lip movements is a tedious task. We present an audio-to-video alignment method for automating speech to lips alignment, stretching and compressing the audio signal to match the lip movements. This alignment is based on deep audio-visual features, mapping the lips video and the speech signal to a shared representation. Using this shared representation we compute the lip-sync error between every short speech period and every video frame, followed by the determination of the optimal corresponding frame for each short sound period over the entire video clip. We demonstrate successful alignment both quantitatively, using a human perception-inspired metric, as well as qualitatively. The strongest advantage of our audio-to-video approach is in cases where the original voice in unclear, and where a constant shift of the sound can not give a perfect alignment. In these cases state-of-the-art methods will fail.
https://gyazo.com/7a8327d46dcf8045a4d152732c624af7