AUDIO DECODING USING MODULATOR-DEMODULATOR

• US 20150356979A1
• Filed: 07/16/2014
• Published: 12/10/2015
• Est. Priority Date: 06/09/2014
• Status: Active Grant

• Current Assignee: VIA Technologies Incorporated (VIA Technologies)
• Original Assignee: VIA Technologies Incorporated (VIA Technologies)
• Inventors: QI, Zongpu, LI, Yong
• Granted Patent: US 9,978,384 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/162 Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
• CPC Class Codes: G10L 19/04 using predictive techniques
• CPC Class Codes: G10L 19/167 Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
• CPC Class Codes: H04M 1/72442 for playing music files

Abstract

An electronic device is provided. The electronic device includes: a first processing unit; a storage unit, configured to store at least one audio file; a first memory unit; and a modulator-demodulator (modem), configured to perform audio processing of the electronic device during a phone call, wherein when the electronic device is used to play the audio file, the first processing unit reads the audio file from the storage unit, retrieves header information of the audio file, and writes the audio file into the first memory unit, wherein the modem accesses the audio file stored in the first memory unit based on the header information, and performs audio decoding on the audio file.

Claims

1. An electronic device, comprising:

a first processing unit;

a storage unit, configured to store at least one audio file;

a first memory unit; and

a modulator-demodulator (modem), configured to perform audio processing for the electronic device during a phone call,

wherein when the electronic device is used to play the audio file, the first processing unit reads the audio file from the storage unit, retrieves header information of the audio file, and writes the audio file into the first memory unit,

wherein the modem accesses the audio file stored in the first memory unit, and performs audio decoding on the audio file based on the header information.

2. The electronic device as claimed in claim 1, wherein the modem directly accesses the audio file stored in the first memory unit.

3. The electronic device as claimed in claim 1, wherein the modem further comprises a second processing unit, and performing audio decoding on the audio file indicates that the second processing unit converts the audio file to audio data in a pulse code modulation (PCM) format based on the header information.

4. The electronic device as claimed in claim 3, wherein the modem further comprises a digital signal processor (DSP), and the DSP performs digital signal processing on the audio data in the PCM format.

5. The electronic device as claimed in claim 1, further comprising:

an audio codec unit, configured to perform digital-to-analog conversion to the audio file decoded by the modem, and output the converted audio file to play.

6. The electronic device as claimed in claim 1, wherein the first processing unit enters a sleep state when the modem performs audio decoding.

7. The electronic device as claimed in claim 1, wherein when the first processing unit receives a control command to control playing of the audio file, the first processing unit transmits the control command to the modem via a framework layer, thereby controlling the modem to perform audio decoding on the audio file.

8. The electronic device as claimed in claim 7, wherein the framework layer further comprises a multimedia interface hardware abstraction layer, and the first processing unit transmits the control command to the modem via the multimedia interface hardware abstraction layer and a kernel layer.

9. The electronic device as claimed in claim 1, wherein the first processing unit writes the audio file into the first memory unit via a framework layer.

10. The electronic device as claimed in claim 9, wherein the framework layer further comprises a music render, and the first processing unit retrieves the header information through the music render.

11. An audio playing method for use in an electronic device, wherein the electronic device comprises a first processing unit, a storage unit, a first memory unit, and a modulator-demodulator (modem), and the storage unit stores at least one audio file, the method comprising:

utilizing the first processing unit to read the audio file from the storage unit, retrieve header information of the audio file, and write the audio file into the first memory unit when the electronic device is used to play the audio file; and

utilizing the modem to access the audio file stored in the first memory unit, and performing audio decoding on the audio file based on the header information.

12. The method as claimed in claim 11, wherein the modem directly accesses the audio file stored in the first memory unit.

13. The method as claimed in claim 11, wherein the step of performing audio decoding on the audio file indicates that the second processing unit converts the audio file to audio data in a pulse code modulation (PCM) format based on the header information, wherein the header information comprises a version and frame rate of the audio file.

14. The method as claimed in claim 13, further comprising:

performing digital signal processing on the audio data in the PCM format.

15. The method as claimed in claim 11, further comprising:

utilizing an audio codec unit to perform digital-to-analog conversion to the audio file decoded by the modem and output the converted audio file to play.

16. The method as claimed in claim 11, wherein the first processing unit enters a sleep state when the modem performs audio decoding.

17. The method as claimed in claim 11, wherein when the first processing unit receives a control command to control playing of the audio file, the first processing unit transmits the control command to the modem via a framework layer, thereby controlling the modem to perform audio decoding on the audio file.

18. The method as claimed in claim 17, wherein the framework layer further comprises a multimedia interface hardware abstraction layer, and the first processing unit transmits the control command to the modem via the multimedia interface hardware abstraction layer and a kernel layer.

19. The method as claimed in claim 11, wherein the first processing unit writes the audio file into the first memory unit via a framework layer.

20. The method as claimed in claim 19, wherein the framework layer further comprises a music render, and the first processing unit retrieves the header information through the music render.