Packet converting apparatus and method therefor
First Claim
1. A packet converting apparatus for converting a first type packet data to a second type packet data, the packet converting apparatus comprising:
- a bit unpacking unit for bit unpacking the first type packet data;
a parameter inverse quantization unit for inverse quantizing unpacked data to obtain a first parameter of the first type packet data;
a parameter converter for converting the first parameter to a second parameter of the second type packet data using inter-frame interpolation;
a quantization unit for quantizing the second parameter converted by the parameter converter and outputting a second type quantized data; and
a bit packing unit for bit packing the second type quantized data to the second type packet data.
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Abstract
A packet converting apparatus and method is disclosed, in which audio packet data of various types used in cable/radio networks can effectively be converted. The packet converting apparatus includes a bit unpacking unit for bit unpacking first type packet data, a parameter inverse quantization unit for inverse quantizing the unpacked data to obtain a main parameter of the first type packet data, a parameter converter for converting the obtained main parameter to a parameter of second type packet data through inter-frame interpolation, a quantization unit for quantizing the second type parameter converted by the parameter converter, and a bit packing unit for bit packing the quantized data to reassemble the bit packed data to second type packet data and output the second type packet data to a destination.
23 Citations
23 Claims
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1. A packet converting apparatus for converting a first type packet data to a second type packet data, the packet converting apparatus comprising:
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a bit unpacking unit for bit unpacking the first type packet data;
a parameter inverse quantization unit for inverse quantizing unpacked data to obtain a first parameter of the first type packet data;
a parameter converter for converting the first parameter to a second parameter of the second type packet data using inter-frame interpolation;
a quantization unit for quantizing the second parameter converted by the parameter converter and outputting a second type quantized data; and
a bit packing unit for bit packing the second type quantized data to the second type packet data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A media gateway for communicating between a first communication network using a first type packet data and a second communication network using a second type packet data, the media gateway comprising:
at least one transcoder connected between the first and the second communication network, each transcoder comprising;
a parameter converter for converting a first parameter of the first type packet data to a second parameter of the second type packet data using inter-frame interpolation, wherein the first and the second parameters include at least one of line spectrum pair, pitch, adaptive codebook (ACB) gain, ACB index, fixed codebook (FCB) gain and FCB index. - View Dependent Claims (11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23)
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16. A method for converting a first type packet data to a second type packet data, comprising the steps of:
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bit unpacking the first type packet data;
inverse quantizing unpacked data to obtain a first parameter of the first type packet data;
converting the first parameter to a second parameter of the second type packet data using inter-frame interpolation;
quantizing the second parameter and outputting a second type quantized data; and
bit packing the second type quantized data to the second type packet data.
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Specification