Mark Henry Schultz

US Patent:

6496537, Dec 17, 2002

Filed:

Jun 11, 1999

Appl. No.:

09/319861

Inventors:

Greg Alan Kranawetter - San Jose CA
Mark Alan Schultz - Carmel IN

Assignee:

Thomson Licensing S.A. - Boulogne Cedex

International Classification:

H04N 736

US Classification:

37524012, 37524024

Abstract:

An MPEG decoder in a high definition television receiver decodes and decompresses MPEG coded data to produce decompressed image pixel blocks, and includes a motion compensation network coupled to a frame memory to produce finally decoded pixel data for display. The decompressed MPEG data is recompressed by plural parallel recompressors prior to storage in frame memory. Each recompressor receives a datastream of interleaved pixel data, and predicts and compresses interleaved pixel values during each clock cycle, respectively. One of the recompressors is de-energized in a reduced data processing mode when pixel data is subsampled prior to recompression. Subsampled data is re-ordered prior to recompression. Multiple parallel decompressors coupled to the frame memory provide pixel data to the motion processing network. A control unit insures an uninterrupted interleaved data flow to the decompressors by repeating last valid data when source data is interrupted.

US Patent:

6668015, Dec 23, 2003

Filed:

Jun 1, 1999

Appl. No.:

09/319215

Inventors:

Greg Alan Kranawetter - San Jose CA
Mark Alan Schultz - Carmel IN

Assignee:

Thomson Licensing S.A. - Cedex

International Classification:

H04N 712

US Classification:

37524012, 37524023

Abstract:

Compression and decompression apparatus and methods for producing fixed-length compressed data blocks with variable-length compression are described. The compression system receives an N-bit word from a data block and determines the variable compression length for the word. A bit counter keeps track of the number of bits remaining and determines if sufficient bits have been used to ensure that the fixed-length compressed data block will be filled. If so, the compressed word is output. If not, prior to output the compressed word is padded with an appropriate number of bits, which may be null bits.

US Patent:

6959313, Oct 25, 2005

Filed:

Jul 8, 2003

Appl. No.:

10/616128

Inventors:

Vikram Kapoor - Sunnyvale CA, US
Kurt Alan Shoens - Los Altos CA, US
Mark Steven Schultz - Los Altos CA, US
Rex Rilen Hamilton - Ben Lomond CA, US

Assignee:

Pillar Data Systems, Inc. - San Jose CA

International Classification:

G06F017/30

US Classification:

707205, 707202, 707203, 707204

Abstract:

The present invention relates to methods and systems of snapshot management of a file system in a data storage system. To represent the snapshots, the invention maintains pointers to the root block pointer of each snapshot. When the active file system is modified, this invention avoids overwriting any blocks used by previous snapshots by allocating new blocks for the modified blocks. When the invention needs to put an established block in a new location, it must update a parent block to point to the new location. The update to the parent block may then require allocating a new block for the new parent block and so forth. Parts of the file system not modified since a snapshot remain in place. The amount of space required to represent snapshots scales with the fraction of the file system that users modify. To maintain snapshot integrity, this invention keeps track of the first and last snapshots that use each block in space map blocks spread throughout the file system data space.

US Patent:

6970504, Nov 29, 2005

Filed:

Dec 15, 1997

Appl. No.:

09/319324

Inventors:

Greg Alan Kranawetter - San Jose CA, US
Mark Alan Schultz - Carmel IN, US

Assignee:

Thomson Licensing - Boulogne-Billancourt

International Classification:

H04B001/66

US Classification:

375240

Abstract:

An MPEG decoder in a high definition television receiver decodes and decompresses MPEG coded data to produce decompressed image pixel blocks, and includes a motion compensation network coupled to a frame memory to produce finally decoded pixel data for display. The decompressed MPEG data is recompressed by plural parallel recompressors prior to storage in frame memory. Each recompressor receives a datastream of interleaved pixel data, and predicts and compresses interleaved pixel values during each clock cycle, respectively. One of the recompressors is de-energized in a reduced data processing mode when pixel data is subsampled prior to recompression. Subsampled data is re-ordered prior to recompression. Multiple parallel decompressors coupled to the frame memory provide pixel data to the motion processing network. A control unit insures an uninterrupted interleaved data flow to the decompressors by repeating last valid data when source data is interrupted.

US Patent:

7257606, Aug 14, 2007

Filed:

Jun 7, 2005

Appl. No.:

11/147739

Inventors:

Vikram Kapoor - Sunnyvale CA, US
Kurt Alan Shoens - Los Altos CA, US
Mark Steven Schultz - Los Altos CA, US
Rex Rilen Hamilton - Ben Lomond CA, US

Assignee:

Pillar Data Systems, Inc. - San Jose CA

International Classification:

G06F 17/30

US Classification:

707205, 707203, 707204, 711162

Abstract:

The present invention relates to methods and systems of snapshot management of a file system in a data storage system. To represent the snapshots, the invention maintains pointers to the root block pointer of each snapshot. When the active file system is modified, this invention avoids overwriting any blocks used by previous snapshots by allocating new blocks for the modified blocks. When the invention needs to put an established block in a new location, it must update a parent block to point to the new location. The update to the parent block may then require allocating a new block for the new parent block and so forth. Parts of the file system not modified since a snapshot remain in place. The amount of space required to represent snapshots scales with the fraction of the file system that users modify. To maintain snapshot integrity, this invention keeps track of the first and last snapshots that use each block in space map blocks spread throughout the file system data space.

US Patent:

7653669, Jan 26, 2010

Filed:

Jul 16, 2007

Appl. No.:

11/879230

Inventors:

Vikram Kapoor - Sunnyvale CA, US
Kurt Alan Shoens - Los Altos CA, US
Mark Steven Schultz - Los Altos CA, US
Rex Rilen Hamilton - Ben Lomond CA, US

Assignee:

Pillar Data Systems, Inc. - San Jose CA

International Classification:

G06F 17/30

US Classification:

707204, 707203, 711162

Abstract:

The present invention relates to methods and systems of snapshot management of a file system in a data storage system. To represent the snapshots, the invention maintains pointers to the root block pointer of each snapshot. When the active file system is modified, this invention avoids overwriting any blocks used by previous snapshots by allocating new blocks for the modified blocks. When the invention needs to put an established block in a new location, it must update a parent block to point to the new location. The update to the parent block may then require allocating a new block for the new parent block and so forth. Parts of the file system not modified since a snapshot remain in place. The amount of space required to represent snapshots scales with the fraction of the file system that users modify. To maintain snapshot integrity, this invention keeps track of the first and last snapshots that use each block in space map blocks spread throughout the file system data space.