IP Library Granted Patent US 8,718,147
Granted Patent B2
US 8,718,147 · App. 11/707,879 · Granted May 6, 2014

Video compression algorithm

Inventors: John Hickey (Ratoath, IE); Paul Hough (Limerick, IE)
Assignee: Avocent Huntsville Corporation
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Quick Facts
Patent No.
US 8,718,147
App. No.
11/707,879
Granted
May 6, 2014
Kind
B2
Abstract

A video compression routine encodes pixels using frame location relationships by using packets with variable length opcode.

Claims (31)

1. A video compression system configured to perform a routine comprising:

comparing a current pixel to a plurality of reference pixels;

making n-bit fixed length header packets that define at least the current pixel, said header packets including:

one of a plurality of variable length opcodes each identifying one of a plurality of encoding commands from a set of available encoding commands including:

(1) run length commands; and

(2) short delta commands;

a variable length payload including:

(1) for run length commands: a count value specifying how many pixels to perform the run length command; and

(2) for short delta commands: a delta value for each color channel such that a short delta command can be represented by a single n-bit fixed packet.

2. The video compression system of claim 1 , wherein:

the n-bit fixed length header packet is 8 bits;

the opcodes for run-length commands are 4 bits; and

the opcodes for short delta commands are 2 bits.

3. The video compression system of claim 1 , wherein said run length commands include:

(a) copy left command;

(b) copy old command; and

(c) copy above command;

and said short delta commands include:

(d) short delta with respect to the same pixel in the previous frame; and

(e) short delta with respect to the pixel to the left of the current pixel.

4. A video compression system configured to perform a routine comprising:

comparing a current pixel to a plurality of reference pixels;

making n-bit fixed length header packets that define at least the current pixel, said header packets including:

one of a plurality of variable length opcodes each identifying one of a plurality of encoding commands from a set of available encoding commands including:

(1) commands that can be executed with a single n-bit packet, including:

(a) run length commands; and

(b) short delta commands;

(2) commands executed with multiple packets including:

(c) delta commands;

(d) make pixel commands;

(e) make series commands.

Assignments (12)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 16, 2024
From: VERTIV IT SYSTEMS, INC.
To: VERTIV CORPORATION
Reel/Frame 069695/0620 →
SECURITY INTEREST Recorded Oct 26, 2021
From: VERTIV CORPORATION; VERTIV IT SYSTEMS, INC.; ELECTRICAL RELIABILITY SERVICES, INC.; ENERGY LABS, INC.
To: UMB BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 057923/0782 →
SECURITY AGREEMENT Recorded Mar 3, 2020
From: ELECTRICAL RELIABILITY SERVICES, INC.; ENERGY LABS, INC.; VERTIV CORPORATION; VERTIV IT SYSTEMS, INC.
To: CITIBANK, N.A.
Reel/Frame 052076/0874 →
RELEASE OF SECURITY INTEREST Recorded Mar 2, 2020
From: JPMORGAN CHASE BANK, N.A.
To: VERTIV CORPORATION (F/K/A ALBER CORP.); VERTIV IT SYSTEMS, INC. (F/K/A AVOCENT CORPORATION); VERTIV IT SYSTEMS, INC. (F/K/A AVOCENT FREMONT, LLC); VERTIV IT SYSTEMS, INC. (F/K/A AVOCENT HUNTSVILLE, LLC); VERTIV IT SYSTEMS, INC. (F/K/A AVOCENT REDMOND CORP.); ELECTRICAL RELIABILITY SERVICES, INC.; VERTIV CORPORATION (F/K/A EMERSON NETWORK POWER, ENERGY SYSTEMS, NORTH AMERICA, INC.); VERTIV CORPORATION (F/K/A LIEBERT CORPORATION)
Reel/Frame 052065/0666 →
RELEASE OF SECURITY INTEREST Recorded Mar 2, 2020
From: THE BANK OF NEW YORK MELLON TRUST COMPANY N.A.
To: VERTIV CORPORATION; VERTIV IT SYSTEMS, INC.; ELECTRICAL RELIABILITY SERVICES, INC.
Reel/Frame 052071/0913 →
SECOND LIEN SECURITY AGREEMENT Recorded Jun 10, 2019
From: VERTIV IT SYSTEMS, INC.; VERTIV CORPORATION; VERTIV NORTH AMERICA, INC.; ELECTRICAL RELIABILITY SERVICES, INC.; VERTIV ENERGY SYSTEMS, INC.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 049415/0262 →
CHANGE OF NAME Recorded Dec 11, 2018
From: AVOCENT CORPORATION
To: VERTIV IT SYSTEMS, INC.
Reel/Frame 047788/0595 →
MERGER Recorded Dec 11, 2018
From: AVOCENT HUNTSVILLE, LLC
To: AVOCENT CORPORATION
Reel/Frame 047742/0934 →
SECURITY AGREEMENT Recorded Dec 2, 2016
From: ALBER CORP.; ASCO POWER TECHNOLOGIES, L.P.; AVOCENT CORPORATION; AVOCENT FREMONT, LLC; AVOCENT HUNTSVILLE, LLC; AVOCENT REDMOND CORP.; ELECTRICAL RELIABILITY SERVICES, INC.; EMERSON NETWORK POWER, ENERGY SYSTEMS, NORTH AMERICA, INC.; LIEBERT CORPORATION; LIEBERT NORTH AMERICA, INC.; NORTHERN TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 040797/0615 →
SECURITY AGREEMENT Recorded Dec 1, 2016
From: ALBER CORP.; ASCO POWER TECHNOLOGIES, L.P.; AVOCENT CORPORATION; AVOCENT FREMONT, LLC; AVOCENT HUNTSVILLE, LLC; AVOCENT REDMOND CORP.; ELECTRICAL RELIABILITY SERVICES, INC.; EMERSON NETWORK POWER, ENERGY SYSTEMS, NORTH AMERICA, INC.; LIEBERT CORPORATION; LIEBERT NORTH AMERICA, INC.; NORTHERN TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 040783/0148 →
CHANGE OF NAME Recorded Oct 12, 2016
From: AVOCENT HUNTSVILLE CORP.
To: AVOCENT HUNTSVILLE, LLC
Reel/Frame 039994/0662 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 22, 2007
From: HICKEY, JOHN; HOUGH, PAUL
To: AVOCENT HUNTSVILLE CORPORATION
Reel/Frame 019468/0348 →
Continuity (5)
Provisional Application 60774186 · Feb 17, 2006
Provisional Application 60836649 · Aug 10, 2006
Provisional Application 60836930 · Aug 11, 2006
Provisional Application 60848488 · Sep 29, 2006
Related Publication 20070274382A1 · Nov 29, 2007