Audio device and method of operating the same

摘要

An audio device and a method of operating the same are provided. The audio device includes a storage unit, a first memory and a second memory, a hardware decoder, a software decoder, a first direct memory access (DMA) block, a second DMA block, and a controller. The controller converts the audio device from an ultra low power mode in which the first PCM information is transmitted to an audio interface buffer through the first memory, the hardware decoder, and the first DMA block or a low power mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the first DMA block to a normal mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the second DMA block.

主权项

1. An audio device comprising:
an audio interface buffer configured to interface an external output device; a storage unit configured to store audio information; a first memory and a second memory configured to be allocated the audio information; a hardware decoder configured to decode the audio information allocated to the first memory, generate first pulse code modulation (PCM) information, and store the first PCM information in the first memory; a software decoder configured to decode the audio information allocated to the second memory, generate second PCM information, and store the second PCM information in the second memory; a first direct memory access (DMA) block configured to receive the first PCM information from the first memory; a second DMA block configured to receive the second PCM information from the second memory; and a controller configured to control the storage unit, the first memory, the second memory, the hardware decoder, the software decoder, the first DMA block, and the second DMA block, wherein the controller converts the audio device from an ultra low power mode in which the first PCM information is transmitted to the audio interface buffer through the first memory, the hardware decoder, and the first DMA block or a low power mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the first DMA block to a normal mode in which the second PCM information is transmitted to the audio interface buffer through the second memory, the software decoder, and the second DMA block.