Methods and apparatus for mixing compressed digital bit streams
First Claim
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1. A method to mix data streams, the method comprising:
- obtaining a first set of transform coefficients from a first compressed data stream, the first set of transform coefficients including a first set of mantissa codes and a first set of exponents;
determining a second set of mantissa codes based on the first set of transform coefficients and a second data stream;
replacing the first set of mantissa codes in the first set of transform coefficients with the second set of mantissa codes, without replacing the first set of exponents in the first set of transform coefficients, to mix the second data stream with the first compressed data stream to form a third data stream without uncompressing the first compressed data stream; and
at least one of transmitting or storing the third data stream.
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Abstract
Methods, apparatus and articles of manufacture for mixing compressed digital bit streams are disclosed. An example method disclosed herein comprises acquiring a frame associated with a first compressed digital bit stream, unpacking the frame to obtain a plurality of original transform coefficient sets, and modifying the plurality of original transform coefficient sets to mix a second digital bit stream with the first compressed digital bit stream.
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Citations
21 Claims
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1. A method to mix data streams, the method comprising:
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obtaining a first set of transform coefficients from a first compressed data stream, the first set of transform coefficients including a first set of mantissa codes and a first set of exponents; determining a second set of mantissa codes based on the first set of transform coefficients and a second data stream; replacing the first set of mantissa codes in the first set of transform coefficients with the second set of mantissa codes, without replacing the first set of exponents in the first set of transform coefficients, to mix the second data stream with the first compressed data stream to form a third data stream without uncompressing the first compressed data stream; and at least one of transmitting or storing the third data stream. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tangible computer readable storage memory device or storage disk comprising computer readable instructions which, when executed, cause a computing device to at least:
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obtain a first set of transform coefficients from a first compressed data stream, the first set of transform coefficients including a first set of mantissa codes and a first set of exponents; determine a second set of mantissa codes based on the first set of transform coefficients and a second data stream; and replace the first set of mantissa codes in the first set of transform coefficients with the second set of mantissa codes, without replacing the first set of exponents in the first set of transform coefficients, to mix the second data stream with the first compressed data stream without uncompressing the first compressed data stream. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus to mix data streams, the apparatus comprising:
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an unpacking unit to obtain a first set of transform coefficients from a first compressed data stream, the first set of transform coefficients including a first set of mantissa codes and a first set of exponents; and a modification unit to; determine a second set of mantissa codes based on the first set of transform coefficients and a second data stream; and replace the first set of mantissa codes in the first set of transform coefficients with the second set of mantissa codes, without replacing the first set of exponents in the first set of transform coefficients, to mix the second data stream with the first compressed data stream to form a third data stream without uncompressing the first compressed data stream; and a repacking unit to output the third data stream to at least one of a transmitter or memory. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification