SCALABLE ENCODING DEVICE AND SCALABLE ENCODING METHOD

摘要

Provided is a scalable encoding device capable of improving quality of a decoded signal without increasing an encoding amount and compensating data with a sufficient quality upon data loss. In the scalable encoding device, an extension layer bit distribution calculation unit (103) calculates a bit distribution of a quality improving encoding data and compensation encoding data in the extension layer according to an audio mode of the input signal. An extension layer encoding unit (105) generates quality improving encoding data according to the specified number of bits. A compensation information encoding unit (104) extracts a part of core layer encoding data and makes it as compensation encoding data for the core layer. An extension layer encoded data generation unit (106) multiplexes the extension layer bit distribution information, the compensation encoding data, and the quality improving encoding data so as to obtain extension layer encoding data.