公开(公告)号：GB2344716B

公开(公告)日：2003-07-30

申请号：GB9924446

申请日：1999-10-18

Applicant: IBM

Inventor： BRIGHT MARTIN JAMES ,  MITCHELL JOAN LAVERNE

IPC: H04N1/41 ,  G06T9/00 ,  H03M7/30 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50

Abstract: This invention solves problems due to employing error degraded data in digital processing. It particularly solves multi-generation problems wherein transform data degrade during each inverse transform and forward transform cycle even without any processing due to the rounding and clipping errors. It provides methods, systems and devices for reduced-error processing of transform-coded data. After inverse transformation of transform data, high-precision numbers are manipulated. The converting to integers and clipping to an allowed range steps are executed at any stage in the manipulation to obtain integer representation of the inverse transformed data such as for displaying of the data. However, further processing including forward transforming back to the transform domain is executed on the high-precision numbers. Thus, the rounding and clipping errors are not present in the processed data. Although advantageous to many applications employing digital transformed data, the invention is particularly advantageous for use in digital studios during editing of MPEG-coded, JPEG-coded and wavelet-coded video and audio data.

公开(公告)号：GB2344716A

公开(公告)日：2000-06-14

申请号：GB9924446

申请日：1999-10-18

Applicant: IBM

Inventor： BRIGHT MARTIN JAMES ,  MITCHELL JOAN LAVERNE

IPC: H04N1/41 ,  G06T9/00 ,  H03M7/30 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50

Abstract: This invention solves problems due to employing error degraded data in digital processing. It particularly solves multi-generation problems wherein transform data degrade during each inverse transform and forward transform cycle even without any processing due to the rounding and clipping errors. It provides methods, systems and devices for reduced-error processing of transform-coded data. After inverse transformation of transform data, high-precision numbers are manipulated. The converting to integers and clipping to an allowed range steps are executed at any stage in the manipulation to obtain integer representation of the inverse transformed data such as for displaying of the data. However, further processing including forward transforming back to the transform domain is executed on the high-precision numbers. Thus, the rounding and clipping errors are not present in the processed data. Although advantageous to many applications employing digital transformed data, the invention is particularly advantageous for use in digital studios during editing of MPEG-coded, JPEG-coded and wavelet-coded video and audio data.

公开(公告)号：MY130637A

公开(公告)日：2007-07-31

申请号：MYPI9904737

申请日：1999-11-02

Applicant: IBM

Inventor： BRIGHT MARTIN JAMES ,  MITCHELL JOAN LAVERNE

IPC: H04N1/41 ,  G06T9/00 ,  H04N7/30 ,  H03M7/30 ,  H04N7/26 ,  H04N7/32 ,  H04N7/50

Abstract: THIS INVENTION SOLVES THE PROBLEM OF EMPLOYING ERROR DEGRADED DATA IN DIGITAL PROCESSING. IT MOST PARTICULARLY SOLVES THE MULTI-GENERATION PROBLEM WHEREIN TRANSFORM DATA (110,115) DEGRADE DURING EACH INVERSE TRANSFORM (120) AND FORWARD TRANSFORM (410) CYCLE EVEN WITHOUT ANY PROCESSING DUE TO THE ROUNDING AND CLIPPING ERRORS. IT PROVIDES A NOVEL METHOD, SYSTEM AND APPARATUS FOR REDUCED-ERROR PROCESSING OF TRANSFORM-CODED DATA (210, 215). AFTER INVERSE TRANSFORMATION OF TRANSFORM DATA THE HIGH PRECISION NUMBERS ARE MANIPULATED. THE CONVERTING TO INTEGERS AND CLIPPING TO AN ALLOWED RANGE STEPS ARE EXECUTED AT ANY STAGE IN THE MANIPULATION TO OBTAIN INTEGER REPRESENTATION OF THE INVERSE TRANSFORMED DATA SUCH AS FOR DISPLAYING OF THE DATA.HOWEVER, FURTHER PROCESSING INCLUDING FORWARD TRANSFORMING BACK TO THE TRANSFORM DOMAIN IS EXECUTED ON THE HIGH PRECISION NUMBERS. THUS, THE ROUNDING AND CLIPPING ERRORS ARE NOT PRESENT IN THE PROCESSED DATA. THE INVENTION IS PARTICULARLY ADVANTAGEOUS FOR USE IN DIGITAL STUDIOS DURING EDITING OF MPEG-, JPEG-AND WAVELET-CODED VIDEO AND AUDIO DATA.(FIG 11A)

公开(公告)号：MY123212A

公开(公告)日：2006-05-31

申请号：MYPI9904738

申请日：1999-11-02

Applicant: IBM

Inventor： BRIGHT MARTIN JAMES ,  MITCHELL JOAN LA VERNE

IPC: G06K9/36 ,  H04N7/26 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41

Abstract: THIS INVENTION SOLVES PROBLEMS DUE TO EMPLOYING ERROR DEGRADED DATA IN DIGITAL PROCESSING. IT PARTICULARLY SOLVES MULTI-GENERATION PROBLEMS WHEREIN TRANSFORM DATA DEGRADE DURING EACH INVERSE TRANSFORM AND FORWARD TRANSFORM CYCLE EVEN WITHOUT ANY PROCESSING DUE TO THE ROUNDING AND CLIPPING ERRORS. IT PROVIDES METHODS, SYSTEMS AND DEVICES FOR REDUCED-ERROR PROCESSING OF TRANSFORM-CODED DATA. AFTER INVERSE TRANSFORMATION OF TRANSFORM DATA, HIGH-PRECISION NUMBERS ARE CONVERTED TO INTEGERS AND CLIPPED TO AN ALLOWED RANGE FORMING CONVERTED DATA. HIGH-PRECISION DIFFERENCES ARE OBTAINED BY SUBTRACTING THE HIGH-PRECISION OUTPUT OF THE INVERSE TRANSFORM FROM THE CONVERTED DATA. THE CONVERTED DATA CAN BE MANIPULATED AND SENT TO OUTPUT DEVICES WHICH EXPECT INTEGER DATA. PROCESSED HIGH-PRECISION NUMBERS ARE FORMED BY ADDING THE HIGH-PRECISION DIFFERENCES TO THE PROCESSED CONVERTED DATA. THUS, THE ROUNDING AND CLIPPING ERRORS ARE GREATLY REDUCED IN THE PROCESSED HIGH-PRECISION NUMBERS.THE PROCESSED HIGH-PRECISION NUMBERS ARE USED FOR FURTHER PROCESSING INCLUDING FORWARD TRANSFORMING BACK TO THE TRANSFORM DOMAIN. IN ANOTHER EMBODIMENT OF THE PRESENT INVENTION PROCESSED HIGH-PRECISION NUMBERS ARE GENERATED BY SELECTING THE HIGH-PRECISION NUMBERS INSTEAD OF THE MANIPULATED CONVERTED DATA WHENEVER THE MANIPULATED CONVERTED DATA STILL EQUALS THE CONVERTED DATA. ALTHOUGH ADVANTAGEOUS TO MANY APPLICATIONS EMPLOYING DIGITAL TRANSFORMED DATA, THE INVENTION IS PARTICULARLY ADVANTAGEOUS FOR USE IN DIGITAL STUDIOS DURING EDITING OF MPEG-CODED, JPEG-CODED AND WAVELET-CODED VIDEO AND AUDIO DATA.(FIG. 11A)

公开(公告)号：MY117744A

公开(公告)日：2004-07-31

申请号：MYPI9904736

申请日：1999-11-02

Applicant: IBM

Inventor： MITCHELL JOAN LAVERNE ,  BRIGHT MARTIN JAMES

IPC: G06K9/36 ,  H04N7/26 ,  G06K9/46 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41

Abstract: THIS INVENTION SOLVES PROBLEMS DUE TO EMPLOYING ERROR DEGRADED DATA IN DIGITAL PROCESSING. IT PARTICULARLY SOLVES THE MULTI-GENERATION PROBLEM WHEREIN TRANSFORM DATA DEGRADE DURING EACH INVERSE TRANSFORM (120) AND FORWARD TRANSFORM (410, 1150) CYCLE EVEN WITHOUT ANY PROCESSING DUE TO THE ROUNDING AND CLIPPING ERRORS. IT PROVIDES METHODS, SYSTEMS AND APPARATUS FOR TRANSFORM-DOMAIN CORRECTION OF REAL-DOMAIN ERRORS IN THE PROCESSING OF TRANSFORM, TRANSFORM-CODED, AND CODED DATA. AFTER INVERSE TRANSFORMATION OF TRANSFORM DATA THE HIGH-PRECISION NUMBERS ARE CONVERTED (140, 320) TO INTEGERS AND CLIPPED TO AN ALLOWED RANGE FORMING CONVERTED DATA. HIGH-PRECISION DIFFERENCES ARE OBTAINED BY SUBTRACTING (1110, 1314) CONVERTED DATA FROM THE HIGH-PRECISION OUTPUT OF THE INVERSE TRANSFORM. THE DIFFERENCES ARE RE-TRANSFORMED BACK TO THE TRANSFORMDOMAIN AND SAVED. IN AN ALTERNATE EMBODIMENT THE DIFFERENCES ARE QUANTIZED, THUS ONLY SIGNIFICANT ERRORS ARE SAVED. IN STILL ANOTHER EMBODIMENT THE QUAANTIZED DIFFERENCES ARE ENTROPY ENCODED. THEN AFTER RE-TRANSFORMING THE PROCESSED CONVERTED DATA, THE DECODED DIFFERENCES, THE DEQUANTIZED, OR THE TRANSFORMED DIFFERENCES CAN BE USED IN THE TRANSFORM DOMAIN TO REMOVE THE REAL-DOMAIN ERRORS INTRODUCED BY THE ORIGINAL CONVERSION TO INTEGERS AND CLIPPING TO THE ALLOWED RANGE.FIG. 11(A)