Patent 7532808

Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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To identify the most relevant prior art for US patent 7532808, I will examine the "References Cited" section of the patent as available through Google Patents. I will then provide the full citation, publication/filing date, a brief description, and which claim(s) it potentially anticipates under 35 U.S.C. § 102.

Based on the information provided, here are the prior art references cited in US7532808:

U.S. PATENT DOCUMENTS

  1. US 5,148,272 A

    • Full Citation: US 5,148,272 A (Acampora et al.)
    • Publication/Filing Date: September 1992 (Publication)
    • Brief Description: The abstract of US 7532808 indicates the patent is for "coding motion in a video sequence". US 5,148,272, titled "Video compression system," describes a video compression system that uses motion compensation and transform coding. It aims to reduce redundancy in video signals by predicting frames from previous frames using motion vectors and then coding the prediction error.
    • Potential Anticipation (35 U.S.C. § 102): This patent generally describes motion compensation in video coding, a foundational concept that predates US7532808. While US7532808 refines the "skip mode" concept, the general idea of using motion vectors and reference frames for prediction is present here. Claims 1, 5, 31, 35, and 47 of US7532808, which describe methods and apparatuses for encoding/decoding using motion compensation and reference frames, could potentially be anticipated by the broad teachings of this prior art regarding motion-compensated video compression.

  2. US 5,191,436 A

    • Full Citation: US 5,191,436 A (Yonemitsu)
    • Publication/Filing Date: March 1993 (Publication)
    • Brief Description: This patent, titled "Motion compensated interframe coding apparatus with reduced processing load," focuses on reducing the processing load in motion-compensated interframe coding. It discusses techniques for motion detection and compensation to compress video data efficiently.
    • Potential Anticipation (35 U.S.C. § 102): Similar to US 5,148,272, this patent broadly covers motion-compensated interframe coding and aims for efficiency. The core concepts of motion compensation and using motion information for prediction, which are central to claims 1, 5, 31, 35, and 47 of US7532808, could be considered in light of this reference.

  3. US 5,442,400 A

    • Full Citation: US 5,442,400 A (Sun et al.)
    • Publication/Filing Date: August 1995 (Publication)
    • Brief Description: Titled "Motion compensated video encoder having improved motion vector search technique," this patent describes an improved motion vector search technique for motion-compensated video encoding. It aims to efficiently find motion vectors to reduce data.
    • Potential Anticipation (35 U.S.C. § 102): This patent addresses improvements in motion vector estimation, which is a component of the encoding process in US7532808. While US7532808 specifically focuses on the "skip mode" and its adaptation to global/regional motion, the underlying process of motion vector determination, as generally described in claims 1, 5, 31, 35, and 47, is relevant.

  4. US 5,701,164 A

    • Full Citation: US 5,701,164 A (Kato)
    • Publication/Filing Date: December 1997 (Publication)
    • Brief Description: This patent is titled "Video signal encoding method and apparatus, and video signal decoding method and apparatus." It discusses various aspects of video signal encoding and decoding, likely including motion compensation techniques given the context of other cited art.
    • Potential Anticipation (35 U.S.C. § 102): As a general patent on video signal encoding and decoding, it would cover the broader field to which US7532808 belongs. Depending on the specific details of Kato's disclosure, it could potentially anticipate the fundamental aspects of motion-compensated encoding and decoding as claimed in US7532808, particularly claims 1, 5, 31, 35, and 47.

  5. US 6,683,987 B1

    • Full Citation: US 6,683,987 B1 (Sugahara)
    • Publication/Filing Date: January 2004 (Publication)
    • Brief Description: This patent, "Moving picture coding method, moving picture decoding method, moving picture coding apparatus, and moving picture decoding apparatus," details methods and apparatuses for coding and decoding moving pictures. Its publication date of January 2004 is after the March 14, 2003 filing date of US7532808. Therefore, it would not be considered prior art under 35 U.S.C. § 102 for US7532808 based on its publication date, unless it has an earlier priority date that precedes March 14, 2003. Without further information about its priority date, it is listed here as a cited reference, but its ability to anticipate claims of US7532808 is unlikely due to the later publication date.
    • Potential Anticipation (35 U.S.C. § 102): (Conditional) If US 6,683,987 B1 has an effective filing date earlier than March 14, 2003, it could potentially anticipate the general concepts of motion-compensated coding and decoding (claims 1, 5, 31, 35, 47). However, based solely on its publication date, it cannot anticipate.

  6. US 7,200,275 B2

    • Full Citation: US 7,200,275 B2 (Srinivasan et al.)
    • Publication/Filing Date: April 2007 (Publication)
    • Brief Description: Titled "Coding of motion vectors," this patent focuses on techniques for coding motion vectors. Its publication date of April 2007 is after the March 14, 2003 filing date of US7532808. Therefore, it would not be considered prior art under 35 U.S.C. § 102 for US7532808 based on its publication date, unless it has an earlier priority date that precedes March 14, 2003.
    • Potential Anticipation (35 U.S.C. § 102): (Conditional) If US 7,200,275 B2 has an effective filing date earlier than March 14, 2003, it could potentially anticipate aspects related to the coding of motion vectors, which is a part of the encoding process in US7532808 (claims 1, 5, 31, 35, 47). However, based solely on its publication date, it cannot anticipate.

OTHER PUBLICATIONS (Non-patent citations)

  1. "Joint Model Number 1” by T. Weigland

    • Full Citation: T. Weigland: “Joint Model Number 1”, Doc. JVT-A003, Joint Video Team of ISO/IEC MPEG and ITU-T VCEG, January 2002.
    • Publication/Filing Date: January 2002
    • Brief Description: This document describes "JM1 of the JVT codec," which is a version of the video coding standard being developed by the Joint Video Team. It defines macroblock partitioning, coding modes (including a skip mode), and motion vector prediction. US7532808 explicitly states it "redefines the skip mode concept used in JM1 of the JVT codec".
    • Potential Anticipation (35 U.S.C. § 102): This is highly relevant prior art. It establishes the conventional understanding of "skip mode" where a constant zero-valued vector is assigned, and highlights the problem that "If the video sequence contains global motion (panning, zooming, etc.), skip mode is actually never used". Claims 1, 5, 31, 35, and 47 of US7532808, which redefine the skip mode to include predicted non-zero motion vectors based on surrounding motion, directly address the limitations of the JM1 skip mode. Therefore, JM1 of the JVT codec would likely anticipate the aspects of US7532808 related to the conventional skip mode and the underlying video encoding/decoding framework, but it would not anticipate the inventive redefinition of the skip mode to include active (non-zero) motion vectors.

  2. "Global Motion Vector Coding" by Shijun Sun and Shawmin Lei

    • Full Citation: Shijun Sun and Shawmin Lei, "Global Motion Vector Coding", Doc. VCEG-20, ITU-T Video Coding Experts Group (VCEG) Meeting, Pattaya, Thailand 4-7 Dec. 2001.
    • Publication/Filing Date: December 2001
    • Brief Description: This document describes a simplified version of global motion compensation where the reference frame is used as is, but additional information is transmitted to describe the global motion, and additional macroblock modes are used to indicate when global motion vectors are used. US7532808 describes this as involving "additional encoder complexity" and "additional information that needs to be transmitted".
    • Potential Anticipation (35 U.S.C. § 102): This reference directly addresses the problem of global motion in video coding. It describes a method for handling global motion, but one that US7532808 aims to improve upon by avoiding the transmission of explicit global motion information. Therefore, it establishes the known approaches to global motion handling. While it teaches mechanisms for addressing global motion, it does not disclose the specific inventive step of US7532808, which is adapting the existing skip mode to carry active motion vectors derived from surrounding macroblocks without transmitting additional motion vector information. It could anticipate the general goal of coding global motion efficiently, but not the specific means claimed in US7532808.

  3. H.263 "Video Coding for Low Bit-Rate Communication", Annex P "Reference Picture Resampling"

    • Full Citation: International Telecommunications Union ITU-T Recommendation H.263 "Video Coding for Low Bit-Rate Communication", Annex P "Reference Picture Resampling", February 1998.
    • Publication/Filing Date: February 1998
    • Brief Description: This standard describes global motion compensation by warping reference frames to cancel global motion effects. It requires complex operations in the decoder and additional information transmitted to guide the building of new reference frames. US7532808 explicitly contrasts its approach with H.263 Annex P, noting the computational complexity and the need for additional transmitted information in H.263.
    • Potential Anticipation (35 U.S.C. § 102): This is highly relevant prior art that defines a method for global motion compensation. It establishes the technical problem of efficiently handling global motion and a known (though complex and data-intensive) solution. While H.263 Annex P teaches global motion compensation, it does so through a different mechanism (warping and explicit transmission of parameters) than the adapted skip mode of US7532808. Therefore, it would anticipate the general problem of coding global motion but not the specific solution claimed in US7532808, which avoids explicit motion information transmission for the skip mode.

  4. ISO MPEG-4 (Video Coding Standard)

    • Full Citation: ISO MPEG-4 (mentioned in connection with global motion compensation, but specific document not cited)
    • Publication/Filing Date: Not explicitly stated for a specific document, but the standard would have been established prior to the filing date of US7532808.
    • Brief Description: The patent mentions ISO MPEG-4 as an example of a standard that uses global motion compensation, similar to H.263+.
    • Potential Anticipation (35 U.S.C. § 102): General knowledge of ISO MPEG-4's global motion compensation techniques would fall under this. Similar to H.263 Annex P, it would establish the existence of methods for global motion compensation but would not anticipate the specific inventive features of US7532808 related to the modified skip mode without explicit motion vector transmission.

Important Note on 35 U.S.C. § 102:
For a reference to anticipate a claim under 35 U.S.C. § 102, it must disclose every element of the claim, either explicitly or inherently, such that a person of ordinary skill in the art could practice the invention from the single prior art reference. The analysis above provides a high-level assessment. A definitive determination would require a detailed claim-by-claim comparison against the full text of each cited reference. Furthermore, for the US patents cited, only those with an effective filing date before the priority date of US7532808 (March 15, 2002, per the provisional application) would qualify as prior art under 35 U.S.C. § 102 based on their content alone. Later publication dates for US patents would still be relevant for an obviousness analysis under 35 U.S.C. § 103 in combination with other references. For non-patent literature, the publication date is generally the relevant date for prior art assessment.

Generated 5/23/2026, 12:46:52 PM