System for producing a quantized signal

• US 6,091,857 A
• Filed: 02/27/1997
• Issued: 07/18/2000
• Est. Priority Date: 04/17/1991
• Status: Expired due to Term

• Current Assignee: Steven M Shaw, Venson M. Shaw
• Original Assignee: Steven M Shaw, Venson M. Shaw
• Inventors: Shaw, Venson M., Shaw, Steven M.
• Primary Examiner(s): Couso, Jose L.
• Assistant Examiner(s): Dang, Duy M.
• Application Number:
  US08/810,981
• Time in Patent Office: 1,237 Days
• Field of Search: 382/251, 382/252, 382/253, 382/232, 382/234, 382/236, 382/248, 341/110, 341/123, 341/124, 341/126, 341/200
• US Class Current: 382/251
• CPC Class Codes: G06F 16/36 Creation of semantic tools, e.g. ontology or thesauri
• CPC Class Codes: G06F 16/93 Document management systems
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: G06T 3/4007 based on interpolation, e.g. bilinear interpolation image demosaicing G06T3/4015; edge-driven or edge-based scaling G06T3/403
• CPC Class Codes: H04L 12/1813 for computer conferences, e.g. chat rooms instant messaging H04L51/04; protocols for multimedia communication H04L65/1101; arrangements for multi-party communication H04L65/403; telephonic conference arrangements H04M3/56; television conference systems H04N7/15
• CPC Class Codes: H04L 12/1822 Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
• CPC Class Codes: H04L 12/1827 Network arrangements for conference optimisation or adaptation
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/403 Arrangements for multi-party communication, e.g. for conferences data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 3/567 Multimedia conference systems
• CPC Class Codes: H04N 19/00 Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
• CPC Class Codes: H04N 19/42 characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation H04N19/635 takes precedence
• CPC Class Codes: H04N 19/51 Motion estimation or motion compensation
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/61 : in combination with predictive coding
• CPC Class Codes: H04N 21/2383 : Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/42226 : Reprogrammable remote control devices
• CPC Class Codes: H04N 21/4382 : Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 7/147 : Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/15 : Conference systems
• CPC Class Codes: H04N 7/173 : with two-way working, e.g. subscriber sending a programme selection signal

Abstract

A system for producing a quantitized scaleable signal during a particular period of time in which the signal is digitized and is represented by a polynomial expression. The number of terms in the expression relates to the accuracy of the digitized signal. The digitized signals are compressed and then are transmitted, stored, retrieved and reconstructed.

Claims

1. A system for producing a quantized scalable signal during a particular period of time comprising:

input means for receiving a time or frequency domain signal X and for sampling and/or partitioning said signal X to an n-dimensional array of subsignals, said signal X decomposable to a two dimensional array of subsignals X_ij ;

digitization/quantization means connected to said input means for calculating each of said X_ij subsignals as the polynomial expression X_ij =a_n xⁿ +a_n-1 x^n-1 +a_n-2 x^n-2 . . . +a₁ x¹ +a₀ ;

means for assessing various characteristics of each of said subsignals X_ij allowing each of said subsignals X_ij to be assigned a priority value and a quantization value;

decision means for determining the compression requirements for said subsignals X_ij are for computing the overall bit contents for the entire signal X according to said compression requirements;

means for transmitting, storing and/or retrieving each of said subsignals X_ij for the signal X in its compressed form based upon said quantization value; and

reconstruction means for restoring the input signal X based upon an approximation of each of said subsignals X_ij to restore said polynomial expressions of each of said subsignals X_ij.

2. The system in accordance with claim 1 further including a scaling means for associating each of said quantization values with said compressions requirements, said scaling means producing a selective quantization value for each of said subsignals X_ij prior to the particular period of time.

3. The system in accordance with claim 2 further including an updating means for updating said priority value for each of said subsignals X_ij during the particular period of time.

4. The system in accordance with claim 3 further including a sensitization means for detection of a change in said compression requirement and for determining the overall bit count for said signal X according to said change in said compression requirement.

5. The system in accordance with claim 4 further including a means for adjusting said quantization value for each of said subsignals X_ij during the particular period of time.

6. The system in accordance with claim 1 further including an updating means for updating said priority value for each of said subsignals X_ij during the particular period of time.

7. The system in accordance with claim 1 further including a sensitization means for detection of a change in said compression requirement and for determining the overall bit count for said signal X according to said change in said compression requirement.

8. The system in accordance with claim 1 further including a means for adjusting said quantization value for each of said subsignals X_ij during the particular period of time.