Prosecution Insights
Last updated: May 29, 2026
Application No. 19/024,510

UNI-DIRECTIONAL DIAGONAL SCAN FOR TRANSFORM COEFFICIENTS

Non-Final OA §102§103§112
Filed
Jan 16, 2025
Priority
Sep 30, 2010 — provisional 61/388,512 +7 more
Examiner
XU, XIAOLAN
Art Unit
2488
Tech Center
2400 — Computer Networks
Assignee
Texas Instruments Incorporated
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
1y 6m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
251 granted / 340 resolved
+15.8% vs TC avg
Moderate +14% lift
Without
With
+13.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
26 currently pending
Career history
374
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
84.4%
+44.4% vs TC avg
§102
7.8%
-32.2% vs TC avg
§112
3.4%
-36.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 340 resolved cases

Office Action

§102 §103 §112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application is being examined under the pre-AIA first to invent provisions. Election/Restrictions Claims 6-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected species II and III, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 04/09/2026. Applicant canceled claims 6-20. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1-5, 21-35 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims of U.S. Patent No. US 9154801 B2, US 9571860 B2, and US 12231642 B2 in view of KIRCHHOFFER et al. (US 20130051459 A1). See below the comparison table: Instant application 19/024510 US 9154801 B2 US 9571860 B2 US 12231642 B2 1. A system comprising: a receiver configurable to receive a bit stream including a one dimensional array of symbols representing a two dimensional array of transform coefficients scanned using a series of one directional diagonal scans in a fixed direction; and processing circuitry coupled to the receiver and configurable to: determine a context for a first binary symbol in the one dimensional array of symbols; arithmetically decode binary symbols in the one dimensional array of symbols using the context for the first binary symbol; debinarize the decoded binary symbols to produce a one dimensional array of transform coefficients; and transform the one dimensional array of transform coefficients to produce a two dimensional array of transform coefficients. 1. A method of encoding video data comprising: providing a two dimensional array of transform coefficients representing a portion of video data; determining a location of a last significant transform coefficient; re-ordering at least a portion of the two dimensional array of transform coefficients to a one dimensional array of data by diagonally scanning the portion in at least two scan lines, each scan line directed in a single common diagonal direction; generating a significance map comprising syntax elements indicating the location of the last significant transform coefficient and locations of additional non-zero transform coefficients in the one dimensional array; representing at least a portion of the one dimensional array of data using a series of additional syntax elements; coding the significance map syntax elements; coding the series of additional syntax elements; and transmitting the coded significance map syntax elements, and the arithmetic coded series of additional syntax elements. 5. The method of claim 1, coding the significance map syntax elements comprising: arithmetic coding the significance map syntax elements. 1. A method of decoding video data comprising: receiving a stream of encoded bits; extracting a set of syntax elements from the encoded bits, the set of syntax elements comprising: an array location of a last significant coefficient in a block of transform coefficients; a significance map for the block of transform coefficients, the significance map representing the block of transform coefficients diagonally scanned in a fixed direction; and a series of additional syntax elements representing values of significant transform coefficients diagonally scanned in fixed direction; generating the block of transform coefficients using the extracted syntax elements; and performing an inverse transform using the block of transform coefficients to generate picture data. 7. A method of decoding transform coefficients by a decoder including a digital processor, the method comprising: receiving, at the digital processor, a bit stream including a one dimensional array of symbols representing a two dimensional array of transform coefficients scanned using a series of one directional diagonal scans in a fixed direction; determining, by the digital processor, a context using coefficients only in diagonal rows of the two dimensional array above and left of a scan of a diagonal row including a given coefficient; arithmetically decoding, by the digital processor, a given symbol in the one dimensional array of symbols using the determined context; debinarizing binary symbols including the decoded symbol to produce a one dimensional array of transform coefficients; and transforming the one dimensional array of transform coefficients to produce a two dimensional array of transform coefficients. KIRCHHOFFER et al. (US 20130051459 A1) discloses determine a context for a first binary symbol in the one dimensional array of symbols (abstract, A higher coding efficiency for coding a significance map indicating positions of significant transform coefficients within a transform coefficient block is achieved by the scan order by which the sequentially extracted syntax elements. The first-type elements may be context-adaptively entropy decoded using contexts which are individually selected for each of the syntax elements dependent on a number of significant transform coefficients in a neighborhood of the respective syntax element); arithmetically decode binary symbols in the one dimensional array of symbols using the context for the first binary symbol (abstract, The first-type elements may be context-adaptively entropy decoded using contexts; [0006] CABAC entropy coding (inherently, CABAC includes binary arithmetic coding)); debinarize the decoded binary symbols to produce a one dimensional array of transform coefficients ([0007] The non-binary syntax element coeff_abs_level_minus_one is first binarized, i.e., it is mapped onto a sequence of binary decisions (bins), and these bins are sequentially coded). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to combine US 9154801 B2 or US 9571860 B2 with KIRCHHOFFER et al. (US 20130051459 A1), to implement the steps of CABAC. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1, 5, 22, 26, 29, 32 and 35 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Regarding claim 1, no support can be found in the original application publication US 20120082233 A1 (Application NO 13/250689) for “debinarize the decoded binary symbols to produce a one dimensional array of transform coefficients”. Regarding claims 5 and 26, no support can be found in the original application publication US 20120082233 A1 (Application NO 13/250689) for “process the first diagonal scan and the second diagonal scan in parallel”. In [0007], applicant discloses enabling parallel processing for the significance map of transform coefficients utilizing context dependency simplification and changing coefficient scanning. In particular, in figure 4, [0028] applicant discloses parallel processing of context selection but not the diagonal scans. Regarding claims 22, 29 and 32, no support can be found in the original application publication US 20120082233 A1 (Application NO 13/250689) for “the two dimensional array of transform coefficients is a 4x4 block of pixels in a picture”. Regarding claim 35, no support can be found in the original application publication US 20120082233 A1 (Application NO 13/250689) for “the series of one directional diagonal scans in the fixed direction is performed through waveform processing of the two dimensional array of transform coefficients”. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of pre-AIA 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (e) the invention was described in (1) an application for patent, published under section 122(b), by another filed in the United States before the invention by the applicant for patent or (2) a patent granted on an application for patent by another filed in the United States before the invention by the applicant for patent, except that an international application filed under the treaty defined in section 351(a) shall have the effects for purposes of this subsection of an application filed in the United States only if the international application designated the United States and was published under Article 21(2) of such treaty in the English language. Claims 1-4, 21-25, 27-34 are rejected under pre-AIA 35 U.S.C. 102(e) as being anticipated by KIRCHHOFFER et al. (US 20130051459 A1). Regarding claim 1. (Currently Amended) KIRCHHOFFER discloses A system (abstract, coding a significance map) comprising: a receiver configurable to receive a bit stream including a one dimensional array of symbols representing a two dimensional array of transform coefficients scanned using a series of one directional diagonal scans in a fixed direction (figure 3, [0061] transferred to the decoder side via bitstream 30; figure 5, figure 7, [0077] map/coefficient entropy decoder 250 sequentially decodes the syntax elements representing the significance map and the significant transform coefficient values; figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa); and processing circuitry coupled to the receiver (figures 3, 5, 7, [0128] a field programmable gate array may cooperate with a microprocessor in order to perform one of the methods described herein. Generally, the methods are performed by any hardware apparatus) and configurable to: determine a context for a first binary symbol in the one dimensional array of symbols (abstract, A higher coding efficiency for coding a significance map indicating positions of significant transform coefficients within a transform coefficient block is achieved by the scan order by which the sequentially extracted syntax elements. The first-type elements may be context-adaptively entropy decoded using contexts which are individually selected for each of the syntax elements dependent on a number of significant transform coefficients in a neighborhood of the respective syntax element; [0007] A measure related to the probability for one of the two possible bin values is estimated for each context based on the values of the bins that have been already coded with the corresponding context. For several bins related to the transform coding, the context that is used for coding is selected based on already transmitted syntax elements or based on the position inside a block; [0016] contexts which are individually selected for each of the first-type syntax elements depending on a number of positions at which according to the previously extracted and associated first-type syntax elements significant transform coefficients are situated, in a neighborhood of the position with which a current first-type syntax element is associated); arithmetically decode binary symbols in the one dimensional array of symbols using the context for the first binary symbol (abstract, The first-type elements may be context-adaptively entropy decoded using contexts; [0006] CABAC entropy coding (inherently, CABAC includes binary arithmetic coding)); debinarize the decoded binary symbols to produce a one dimensional array of transform coefficients ([0007] The non-binary syntax element coeff_abs_level_minus_one is first binarized, i.e., it is mapped onto a sequence of binary decisions (bins), and these bins are sequentially coded (debinarization is the inverse step at the decode side)); and transform the one dimensional array of transform coefficients to produce a two dimensional array of transform coefficients (figure 7, [0077] associate these sequentially decoded syntax elements/values to the positions within the transform block 256). Regarding claim 2. (New) KIRCHHOFFER discloses The system of claim 1, wherein the series of one directional diagonal scans in the fixed direction includes a series of up-right diagonal scans (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa). Regarding claim 3. (New) KIRCHHOFFER discloses The system of claim 1, wherein each entry in the one dimensional array of symbols indicates whether a non-zero transform coefficient exists at a position in the two dimensional array of transform coefficients ([0006] a binary-valued significance map is coded, which specifies which of the transform coefficient levels have non-zero values. And then, in a reverse scan order, the values of the non-zero transform coefficient levels are coded. The significance map is coded as follows. For each coefficient in the scan order, a binary syntax element significant_coeff_flag is coded, which specifies whether the corresponding transform coefficient level is not equal to zero). Regarding claim 4. (New) KIRCHHOFFER discloses The system of claim 1, wherein the series of one directional diagonal scans in the fixed direction is not a zigzag scan (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa). Regarding claim 21. (New) KIRCHHOFFER discloses The system of claim 1, wherein to arithmetically decode the binary symbols in the one dimensional array of symbols, the processing circuitry is configurable to perform binary arithmetic decoding on the binary symbols in the one dimensional array of symbols (abstract, The first-type elements may be context-adaptively entropy decoded using contexts; [0006] CABAC entropy coding (inherently, CABAC includes binary arithmetic coding)). Regarding claim 22. (New) KIRCHHOFFER discloses The system of claim 21, wherein the two dimensional array of transform coefficients is a 4x4 block of pixels in a picture (figure 8). Regarding claim 23. (New) the same analysis has been stated in claim 3. Regarding claim 24. (New) the same analysis has been stated in claim 4. Regarding claim 25. (New) the same analysis has been stated in claim 3. Regarding claim 27. (New) the same analysis has been stated in claim 21. Regarding claim 28. (New) KIRCHHOFFER discloses The system of claim 1, wherein the series of one directional diagonal scans in the fixed direction includes a series of down-left diagonal scans (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa). Regarding claim 29. (New) the same analysis has been stated in claim 22. Regarding claim 30. (New) the same analysis has been stated in claim 3. Regarding claim 31. (New) the same analysis has been stated in claim 4. Regarding claim 32. (New) KIRCHHOFFER discloses The system of claim 1, wherein the two dimensional array of transform coefficients includes a two-dimensional transform significance map associated with transform coefficients in a 4x4 block of pixels in a picture (figure 5, figure 7, [0077] map/coefficient entropy decoder 250 sequentially decodes the syntax elements representing the significance map and the significant transform coefficient values; figure 8). Regarding claim 33. (New) KIRCHHOFFER discloses The system of claim 1, wherein each scan in the series of one directional diagonal scans in the fixed direction starts with a position in a top row or a position in a right-most column of the two dimensional array of transform coefficients (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa). Regarding claim 34. (New) KIRCHHOFFER discloses The system of claim 1, wherein each scan in the series of one directional diagonal scans in the fixed direction starts with a position in a bottom row or a position in a left-most column of the two dimensional array of transform coefficients (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa). Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of pre-AIA 35 U.S.C. 103(a) which forms the basis for all obviousness rejections set forth in this Office action: (a) A patent may not be obtained though the invention is not identically disclosed or described as set forth in section 102, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under pre-AIA 35 U.S.C. 103(a) are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims under pre-AIA 35 U.S.C. 103(a), the examiner presumes that the subject matter of the various claims was commonly owned at the time any inventions covered therein were made absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and invention dates of each claim that was not commonly owned at the time a later invention was made in order for the examiner to consider the applicability of pre-AIA 35 U.S.C. 103(c) and potential pre-AIA 35 U.S.C. 102(e), (f) or (g) prior art under pre-AIA 35 U.S.C. 103(a). Claims 5, 26 and 35 are rejected under pre-AIA 35 U.S.C. 103(a) as being unpatentable over KIRCHHOFFER et al. (US 20130051459 A1) in view of Bao et al. (US 20080013622 A1). Regarding claim 5. (New) KIRCHHOFFER discloses The system of claim 1, wherein the series of one directional diagonal scans in the fixed direction includes a first diagonal scan and a second diagonal scan (figure 8, [0093] Both scanning patterns 300 and 302 consist of a number of diagonal sub-scans for diagonals from bottom-left to top-right or vice versa), and Bao discloses wherein the processing circuitry is configurable to process fragments in parallel ([0007] The fragments may be entropy coded independently of one another using separate coding contexts so that multiple fragments may be simultaneously decoded). It would have been obvious to one of ordinary skill in the art at the time of invention to combine the inventions of KIRCHHOFFER and Chang, to process the first diagonal symbol and the second diagonal symbol in parallel, in order to decode the bitstream more efficiently. Regarding claim 26. (New) the same analysis has been stated in claim 5. Regarding claim 35. (New) the same analysis has been stated in claim 5. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to XIAOLAN XU whose telephone number is (571)270-7580. The examiner can normally be reached Mon. to Fri. 9am-5pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, SATH V. PERUNGAVOOR can be reached at (571) 272-7455. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /XIAOLAN XU/Primary Examiner, Art Unit 2488
Read full office action

Prosecution Timeline

Jan 16, 2025
Application Filed
Jul 28, 2025
Response after Non-Final Action
May 12, 2026
Non-Final Rejection mailed — §102, §103, §112 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
74%
Grant Probability
88%
With Interview (+13.7%)
2y 11m (~1y 6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 340 resolved cases by this examiner. Grant probability derived from career allowance rate.

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