Apparatus for processing a mix signal and method thereof

• US 9,418,667 B2
• Filed: 10/12/2007
• Issued: 08/16/2016
• Est. Priority Date: 10/12/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyen O, Jung, Yang-Won
• Primary Examiner(s): Lee, Ping
• Application Number:
  US12/445,046
• Publication Number:
  US 20100092008A1
• Time in Patent Office: 3,231 Days
• Field of Search: 381 19- 23
• US Class Current: 1/1
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing

Abstract

A method and apparatus for processing a signal, and more particularly, to an apparatus for processing a mix signal and method thereof are disclosed, by which a mix signal such as an audio signal and a video signal can be encoded/decoded. The present invention includes receiving at least one of a mix signal and source signals and generating a unified side information corresponding to a unified source signal using the mix signal and the at least one of the source signals, wherein the unified source signal is generated by grouping at least one source signal.

Claims

1. A signal processing method, the signal comprising a mix signal and unified side information, the unified side information generated using at least one of the mix signal and unified source signals, the unified source signals generated by grouping at least two source signals, the method comprising:

receiving the mix signal and the unified side information;

extracting first identification information from the mix signal and second identification information from the unified side information;

generating a control signal indicating playable when the first identification information and the second identification information are matched to each other;

generating a remix signal by remixing the mix signal and the unified side information when the control signal is generated; and

outputting the remix signal through one or more loudspeakers.

2. The signal processing method of claim 1, wherein the mix signal is a stereo channel signal, and each channel of the stereo channel signal includes a plurality of source signals.

3. The signal processing method of claim 2, when the mix signal is a stereo channel signal including a plurality of source signals (S_{1_L}, S_{1_R}, S_{2_L}, S_{2_R}, . . . , S_{M_L}, S_{M_R}), one unified source signal is generated by Formula

S₁=½

*(S_{1_L}+S_{2_R}),

wherein S₁;

indicates a unified source signal generated from grouping S_{1_L} and S_{1_R}.

4. The signal processing method of claim 3, if a source signal is Si, side information corresponding to the source signal (Si) includes at least one of gain factor (a_i, b_i) and subband power (E{s_i²(k)}),

wherein the unified side information corresponding to the unified source signal S₁, S₂, . . . , S_M) is generated by Formula

a₁,b₁,ε

{S₁²(k)}

a₂,b₂,ε

{S₂²(k)}

. . .

a_M,b_M,ε

{S_M²(k)}

wherein the gain factors (a₁, b₁), is generated from the source signals (S_{1_L}, S_{1_R}) and the unified source signal (S₁) by Formula

S_{1 L}=a₁*S₁

S_{1_R}=b₁*S₁.

5. A signal processing apparatus, the signal comprising a mix signal and unified side information, the unified side information generated using at least one of the mix signal and unified source signals, the unified source signals generated by grouping at least two source signals, the apparatus comprising:

a core decoding unit decoding the mix signal and extracting first identification information from the mix signal;

a side information decoding unit decoding the unified side information and extracting second identification information from the unified side information;

an identification information reading unit deciding whether the first identification information and the second identification information are matched to each other, wherein the identification information reading unit generates a control signal indicating playable when the first identification information and the second identification information are matched to each other; and

a remix rendering unit generating a remix signal by remixing the mix signal and the unified side information when the control signal is generated, and outputting the remix signal through one or more loudspeakers.

6. The signal processing apparatus of claim 5, wherein the mix signal is a stereo channel signal, and each channel of the stereo channel signal includes a plurality of source signals.

7. the signal processing apparatus of claim 6, when the mix signal is a stereo channel signal including a plurality of source signals (S_{1_L}, S_{1_R}, S_{2_L}, S_{2_R}, . . . , S_{M_L}, S_{M_R}), one unified source signal is generated by Formula

S₁=½

*(S_{1_L}+S_{1_R}),

wherein S₁ indicates a unified source signal generated from grouping S_{1_L} and S_{1_R}.

8. The signal processing apparatus of claim 7, if a source signal is Si, side information corresponding to the source signal (Si) includes at least one of gain factor (a_i, b_i) and subband power (E{s_i²(k)}),

wherein the unified side information corresponding to the unified source signal (S₁, S₂, . . . , S_M) is generated by Formula

a₁,b₁,ε

{S₁²(k)}

a₂,b₂,ε

{S₂²(k)}

. . .

a_M,b_M,ε

{S_M²(k)}

wherein the gain factors (a₁, b₁) is generated from the source signals (S_{1_L}, S_{1_R}) and the unified source signal (S₁) by Formula

S_{1 L}=a₁*S₁

S_{1_R}=b₁*S₁.