Apparatus and method for performing bitplane coding with reordering in a fine granularity scalability coding system
View Patent ↗An apparatus and method for performing bitplane coding with reordering, that may be used in a Fine Granularity Scalability (FGS) system. The apparatus and method reorder coefficients each time after a bitplane is coded. By reordering, the apparatus and method separate the coefficients into two groups. When coding a bitplane, bits in the first group are copied into the bitstream, while the bits in the second group are subject to common run-length, VLC, or arithmetic coding. The apparatus and method may also be used with or in a conventional SNR, temporal and/or spatially scalable architectures, for example, as utilized within an MPEG-4 framework.
1. A bitplane encoder, comprising:
a reordering module for reordering a plurality of bit-planes beginning with a most significant bit (MSB) to produce reordered coefficients and non-reordered coefficients, which make up a reordered bitplane; and
a bitplane encoding module for receiving the reordered bitplane and for encoding the reordered bitplane to produce a compressed output stream, said bitplane encoding module encoding the reordered bitplane using at least one of run-length and variable-length encoding, wherein the compressed output stream includes encoded data from the non-reordered coefficients and raw data from the reordered coefficients.
2. The bitplane encoder of claim 1 , wherein said bitplane encoder is implemented in hardware and/or software.
3. A fine granularity scalability (FGS) enhancement encoder including the bitplane encoder of claim 1 .
4. The FGS enhancement encoder of claim 3 , wherein the FGS enhancement encoder performs at least one of signal-to-noise ratio, temporal, or spatial scalability enhancement.
5. A fine granularity scalability (FGS) encoder including the bitplane encoder of claim 1 .
6. The FGS encoder of claim 5 , wherein the FGS encoder performs at least one of signal-to-noise ratio, temporal, or spatial scalability enhancement.
7. A studio including the bitplane encoder of claim 1 , said studio for performing at least one of browsing, archiving, cataloging, transcoding from a first format to a second format, editing, and streaming.
8. A method of bitplane encoding, comprising:
reordering a plurality of bit-planes beginning with a most significant bit (MSB) to produce reordered coefficients and non-reordered coefficients, which make up a reordered bitplane; and
encoding the reordered bitplane using at least one of run-length and variable-length encoding to produce a compressed output stream, wherein the compressed output stream includes encoded data from the non-reordered coefficients and raw data from the reordered coefficients.
9. A bitplane decoding module for receiving inverse reordered coefficients and non-inverse reordered coefficients and for decoding the non-inverse reordered coefficients and not the inverse reordered coefficients to produce an output stream.
10. The bitplane decoding module of claim 9 , wherein said inverse reordering module is implemented in hardware and/or software.
11. A bitplane decoder, comprising:
an inverse reordering module for receiving an encoded, reordered bitplane and performing inverse reordering on the encoded, reordered bitplane beginning with a most significant bit (MSB) to produce inverse reordered coefficients and non-inverse reordered coefficients; and
a bitplane decoding module for receiving the inverse reordered coefficients and the non-inverse reordered coefficients and for decoding the non-inverse reordered coefficients and not the inverse reordered coefficients to produce an output stream.
12. The bitplane decoder of claim 11 , said bitplane decoding module decoding the non-inverse reordered coefficients using at least one of run-length and variable-length decoding, wherein the output stream includes decoded data from the non-inverse reordered coefficients and raw data from the inverse reordered coefficients.
13. The bitplane decoder of claim 11 , wherein said bitplane decoder is implemented in hardware and/or software.
14. A fine granularity scalability (FGS) decoder including the bitplane decoder of claim 11 .
15. The FGS decoder of claim 14 , wherein the FGS decoder performs at least one of signal-to-noise ratio, temporal, or spatial scalability enhancement.
16. A studio including the bitplane decoder of claim 11 , said studio for performing at least one of browsing, archiving, cataloging, transcoding from a first format to a second format, editing, and streaming.
17. A method of decoding, comprising:
receiving inverse reordered coefficients and non-inverse reordered coefficients and for decoding the non-inverse reordered coefficients and not the inverse reordered coefficients to produce an output stream.
18. The method of claim 17 , wherein said decoding method is implemented in hardware and/or software.
19. A method of decoding, comprising:
receiving an encoded, reordered bitplane and inverse reordering the encoded, reordered bitplane beginning with a most significant bit (MSB) to produce inverse reordered coefficients and non-inverse reordered coefficients; and
decoding the non-inverse reordered coefficients and not the inverse reordered coefficients to produce an output stream.
20. The method of claim 19 , said decoding step decoding the non-inverse reordered coefficients using at least one of run-length and variable-length decoding, wherein the output stream includes decoded data from the non-inverse reordered coefficients and raw data from the inverse reordered coefficients.