| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cd8dff0cc6d024e095d5decaf9202f49 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M7-3046 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M7-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M7-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B14-06 |
| filingDate |
1972-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1973-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c85f5c7b7bbfbf23fe7f11ba7fc1d61 |
| publicationDate |
1973-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3772682-A |
| titleOfInvention |
Digital conversion from one pcm format to another |
| abstract |
Conversion between adaptive differential PCM normally is accomplished by decoding, requantizing, and recoding. Complex operations are required and noise and other distortions are inevitably introduced. According to this invention, conversion is carried out entirely on a digital basis without decoding to baseband. The bit stream of a signal in one code format is examined logically to determine the constraints applied during its coding for the removal of signal redundancy. Redundancy is thereupon redistributed by adjusting the code word description to the degree necessary for the new format. Since no intermediate decoding is employed, no additional noise is introduced, and the resulting coded signal may be expressed with digital words to any desired accuracy. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2501531-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3419640-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5334977-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5325374-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4206447-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006171372-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5115241-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0508597-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1071218-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0508597-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4002981-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7453889-B2 |
| priorityDate |
1972-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |