Dual aldc decompressors inside printer asic

• US 6,300,885 B1
• Filed: 04/14/2000
• Issued: 10/09/2001
• Est. Priority Date: 04/14/2000
• Status: Expired due to Term

• Current Assignee: Uniloc 2017 LLC (SoftBank Group Corp.)
• Original Assignee: International Business Machines Corporation
• Inventors: Teklits, Larry David, D'Avis, Timothy, Davenport, Perry P.
• Primary Examiner(s): JeanPierre, Peguy
• Assistant Examiner(s): Jeanglaude, Jean Bruner
• Application Number:
  US09/549,803
• Time in Patent Office: 543 Days
• Field of Search: 358/1.2, 358/1.15, 358/1.16, 341/50, 341/67, 341/87
• US Class Current: 341/50
• CPC Class Codes: H03M 7/30 Compression speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Abstract

A data buffering/transformation system and method that compresses a received signal and stores the compressed received data signal in a data storage unit to conserve storage usage. The system decompresses the data signal prior to transmitting the signal. The received data signal may be an encoded data signal. In such a case, the system further decompresses the received data signal, decodes the signal, recompresses the signal, and stores the signal in the data storage unit. The system and method employs a combination compressor and first decompressor and a second decompressor so the system and method can simultaneously decompress a compressed received data signal and decompress a compressed decoded received data signal.

Claims

1. A data buffering system, coupled to a data storage unit, comprising:

a) a combination compressor and first decompressor coupled to the data storage unit; and

b) a second decompressor coupled to the data storage unit,

c) wherein the combination compressor and first decompressor compress a received data signal for storage in the data storage unit and the second decompressor decompresses the compressed data signal stored in the data storage unit to generate a transmit data signal.

2. The data buffering system of claim 1, wherein the combination compressor and first decompressor is a lossless compressor and decompressor and the second decompressor is a lossless decompressor.

3. The data buffering system of claim 2, wherein the received data signal is an encoded data signal.

4. The data buffering system of claim 3, wherein the data buffering system is coupled to a data processing unit, the combination compressor and first decompressor decompresses the compressed received data signal stored in the least one data storage unit and passes the decompressed first data signal to the data processing unit, and the data processing unit converts the encoded received data signal into a decoded received data signal.

5. The data buffering system of claim 4, wherein the combination compressor and first decompressor compresses the decoded received data signal for storage in the data storage unit and the second decompressor decompresses the compressed decoded received data signal stored in the data storage unit to generate the transmit data signal.

6. The data buffering system of claim 5, wherein the received data signal is an encoded print signal and the transmit data signal is a decoded print signal.

7. The data buffering system of claim 6, wherein the data buffering system is a data buffering/transformation system that transforms the received data signal into the transmit data signal.

8. The data buffering system of claim 6, wherein the data buffering system is an application specific integrated circuit.

9. The data buffering system of claim 6, wherein the data buffering system is a printer application specific integrated circuit.

10. The data buffering system of claim 1, wherein the combination compressor and first decompressor are capable of decompressing one compressed received data signal in the data storage unit while the second decompressor is decompressing another compressed data signal stored in the data storage unit.

11. A data signal buffering method, the method comprising the steps of:

a) receiving a data signal;

b) compressing the received data signal using a combination compressor and first decompressor;

c) storing the compressed received data signal in a data storage unit;

d) retrieving the compressed received data signal from the data storage unit; and

e) decompressing the retrieved compressed received data signal using a second decompressor.

12. The buffering method of claim 11, wherein the first data signal is an encoded data signal.

13. The data buffering method of claim 12, further comprising the steps of:

f) retrieving the compressed received data signal from the data storage unit;

g) decompressing the retrieved compressed received data signal using the combination compressor and first decompressor; and

h) decoding the retrieved decompressed received data signal.

14. The data buffering method of claim 13, further comprising the steps of:

i) compressing the decoded received data signal using the combination compressor and first decompressor;

j) storing the compressed decoded received data signal in the data storage unit;

k) retrieving the compressed decoded received data signal from the data storage unit; and

l) decompressing the retrieved decoded compressed received data signal using a second decompressor.

15. The data buffering method of claim 14, wherein the received data signal is an encoded print signal and the decompressed decoded data signal is a decoded print signal.

16. The data buffering method of claim 15, wherein the data buffering method is a data buffering/transformation method that transforms data signals.

17. The data buffering method of claim 13, wherein step a) includes compressing the received data signal using a lossless compression algorithm and step e) includes decompressing the compressed received data signal using the same lossless compression algorithm.

18. The data buffering method of claim 11, further comprising:

decompressing, with the combination compressor and first decompressor, one compressed received data signal in the data storage unit while decompressing, with the second decompressor, another compressed data signal stored in the data storage unit.

19. The data buffering method of claim 11, wherein step b) includes compressing the received data signal using a lossless compression algorithm and step e) includes decompressing the compressed received data signal using the same lossless compression algorithm.

20. An article of manufacture, the article of manufacture comprising computer readable storage media including program logic embedded therein that causes control circuitry to perform the steps of:

a) compressing a received data signal using a combination compressor and first decompressor;

b) storing the compressed received data signal in a data storage unit;

c) retrieving the compressed received data signal from the data storage unit; and

d) decompressing the retrieved compressed received data signal using a second decompressor.

21. The article of manufacture of claim 20, wherein step a) includes compressing the received data signal using a lossless compression algorithm and step d) includes decompressing the compressed received data signal using the same lossless compression algorithm.

22. The article of manufacture of claim 20, further comprising:

decompressing, with the combination compressor and first decompressor, one compressed received data signal in the data storage unit while decompressing, with the second decompressor, another compressed data signal stored in the data storage unit.

23. The article of manufacture of claim 20, wherein the received data signal is an encoded data signal.

24. The article of manufacture of claim 23, further comprising the steps of:

e) retrieving the compressed received data signal from the data storage unit;

f) decompressing the retrieved compressed received data signal using the combination compressor and first decompressor; and

g) decoding the retrieved decompressed received data signal.

25. The article of manufacture of claim 24, further comprising the steps of:

h) compressing the decoded received data signal using the combination compressor and first decompressor;

i) storing the compressed decoded received data signal in the data storage unit;

j) retrieving the compressed decoded received data signal from the data storage unit; and

k) decompressing the retrieved decoded compressed received data signal using a second decompressor.

26. The article of manufacture of claim 25, wherein the received data signal is an encoded print signal and the decompressed decoded data signal is a decoded print signal.

27. The article of manufacture of claim 24, wherein step a) includes compressing the received data signal using a lossless compression algorithm and step d) decompresses the compressed received data signal using the same lossless compression algorithm.