Apparatus and method for encoding at least one parameter associated with a signal source

• US 8,725,500 B2
• Filed: 11/19/2008
• Issued: 05/13/2014
• Est. Priority Date: 11/19/2008
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Mittal, Udar, Gibbs, Jonathan A, Ashley, James P, Francois, Holly L
• Primary Examiner(s): Han, Qi
• Application Number:
  US12/273,974
• Publication Number:
  US 20100125453A1
• Time in Patent Office: 2,001 Days
• Field of Search: 704/219, 704/221, 704/227, 704/229, 704/230, 704/222
• US Class Current: 704/219
• 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

Abstract

Apparatus (119) for encoding at least one parameter associated with a signal source for transmission over k frames to a decoder comprises a processor (119) which is configured in operation to assign a predetermined bit pattern to n bits associated with the at least one parameter of a first frame of k frames and set the n bits associated with the at least one parameter of each of k−1 subsequent frames to values, such that the values of the n bits of the k−1 subsequent frames represent the at least one parameter. The predetermined bit pattern indicates a start of the at least one parameter.

Claims

1. An audio signal encoding apparatus for encoding at least one audio signal parameter associated with a signal source for transmission over k frames of an encoded bitstream, the apparatus comprising:

a processor configured in operation to;

assign a predetermined bit pattern to n bits associated with the at least one audio signal parameter of a first frame of k frames, the predetermined bit pattern indicating a start of the at least one audio signal parameter; and

set the n bits associated with the at least one audio signal parameter of each of k−

1 subsequent frames to values, such that the values of the n bits of the k−

1 subsequent frames represent the at least one audio signal parameter;

wherein the values of the n bits in each of the k−

1 subsequent frames are selected to be different to values of the n bits of the predetermined bit pattern; and

wherein the at least one audio signal parameter is encoded within (2ⁿ−

1)^(k-1) values provided by the n bits of the k−

1 frames.

2. The apparatus according to claim 1, wherein k and n are integers greater than one.

3. The apparatus according to claim 1, wherein the n bits of the frame following the first frame represents a least significant or most significant digit of the at least one audio signal parameter.

4. The apparatus according to claim 1, wherein the at least one audio signal parameter has a value in a predetermined range.

5. The apparatus according to claim 1, wherein the at least one audio signal parameter includes a plurality of parameters.

6. The apparatus according to claim 5, wherein the plurality of parameters are encoded within (2ⁿ−

1)^(k-1) values provided by the n bits of the k−

1 frames.

7. The apparatus according to claim 1, wherein the at least one audio signal parameter includes at least one of the following parameters:

stereo delay parameter, signal source identification parameter, head related transfer function (HRTF) description parameter, room reverberation description parameter, local signal-to-noise ratio measure parameter, and time stamp parameter.