Selecting pitch lag

There are provided methods and apparatus capable of performing a low complexity pitch detection procedure, e.g., for long term postfiltering, LTPF, encoding. One inventive apparatus (10, 60a, 110) for encoding an information signal including a plurality of frames, comprises: a first estimator (11) configured to obtain a first estimate (14, T 1 ), the first estimate being an estimate of a pitch lag for a current frame (13); a second estimator (12) configured to obtain a second estimate (16, T 2 ), the second estimate being another estimate of a pitch lag for the current frame (13), a selector (17) configured to choose (S103) a selected value (19, T best ) by performing a selection between the first estimate (14, T 1 ) and the second estimate (16, T 2 ) on the basis of at least one correlation measurement (23, 25), wherein the second estimator (12) is conditioned by the pitch lag (51, 19") selected at the previous frame so as to obtain the second estimate (16, T 2 ) for the current frame (13).