TWI457002B - 量化用於一支援根據內容調適性二進制算術編碼(cabac)之視訊編碼過程之一視訊區塊之係數的方法、裝置、器件及電腦可讀媒體 - Google Patents

量化用於一支援根據內容調適性二進制算術編碼(cabac)之視訊編碼過程之一視訊區塊之係數的方法、裝置、器件及電腦可讀媒體 Download PDF

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TWI457002B
TWI457002B TW098100525A TW98100525A TWI457002B TW I457002 B TWI457002 B TW I457002B TW 098100525 A TW098100525 A TW 098100525A TW 98100525 A TW98100525 A TW 98100525A TW I457002 B TWI457002 B TW I457002B
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Marta Karczewicz
Yan Ye
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/147—Data rate or code amount at the encoder output according to rate distortion criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/18—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a set of transform coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/19—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding using optimisation based on Lagrange multipliers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

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Claims (39)

  1. 一種量化用於一支援根據內容調適性二進制算術編碼(CABAC)之視訊編碼過程之一視訊區塊之係數的方法，該方法包含：針對該視訊區塊而產生數目n個的經量化係數組，其中該視訊區塊包括n個係數，其中基於該視訊區塊之該等n個係數中之一特定者對應於該視訊區塊之一最後非零係數之一假定而界定該等n個經量化係數組中之每一者，且其中產生該n組之每一者包括針對被假定對應該視訊區塊之該最後非零係數之視訊區塊之該等係數中之一特定者之前的組中的至少一係數選擇複數個預先界定的量化值之一者；估計與經由該CABAC對該視訊區塊進行編碼相關聯的複數個成本，其中該等所估計之成本分別係基於該等經量化係數組中之不同者；及選擇該等經量化係數組中與該等成本中之一最低者相關聯之一給定者。
  2. 如請求項1之方法，進一步包含輸出該等經量化係數組中之該給定者。
  3. 如請求項2之方法，進一步包含：接收該等經量化係數組中之該給定者；對該等經量化係數組中之該給定者執行該CABAC，以將該等經量化係數組中之該給定者熵編碼為一位元流；及輸出該位元流。
  4. 如請求項1之方法，其中估計該等成本包含計算與一速率失真模型相關聯的拉格朗日成本函數。
  5. 如請求項4之方法，其中該等拉格朗日成本函數界定與該等經量化係數組中之該等經量化係數中之每一者相關聯之個別係數拉格朗日成本組。
  6. 如請求項5之方法，進一步包含：針對該等經量化係數之等於零、一最低值及一最高值之值而計算與該等經量化係數組中之該等經量化係數相關聯之該等個別係數拉格朗日成本組。
  7. 如請求項6之方法，其中該最低值係基於該視訊區塊之該等係數中之一個別者之一絕對值、一量化參數及一量化矩陣，且其中該最高值包含該最低值加一。
  8. 如請求項6之方法，進一步包含，針對該等經量化係數中之一個別者：若該等經量化係數中之該個別者相較於距該最高值而更接近於該最低值，則針對等於該最高值之值，跳過與該等經量化係數中之該個別者相關聯之一個別係數拉格朗日成本的計算。
  9. 如請求項1之裝置，其中該複數個預先界定量化值包括零、一底部值及一頂部值。
  10. 一種包含指令之非暫時性電腦可讀媒體，該等指令在執行後即使得一器件在一支援根據內容調適性二進制算術編碼(CABAC)之視訊編碼過程中量化一視訊區塊之係數，其中該等指令使得該器件： 針對該視訊區塊產生數目n個的經量化係數組，其中該視訊區塊包括n個係數，其中基於該視訊區塊之該等n個係數中之一特定者對應於該視訊區塊之一最後非零係數之一假定而界定該等n個經量化係數組中之每一者，且其中產生該n組之每一者包括針對被假定對應該視訊區塊之該最後非零係數之視訊區塊之該等係數中之一特定者之前的組中的至少一係數選擇複數個預先界定量化值之一者；估計與經由該CABAC對該視訊區塊進行編碼相關聯的複數個成本，其中該等所估計之成本分別係基於該等經量化係數組中之不同者；及選擇該等經量化係數組中與一最低成本相關聯之一給定者。
  11. 如請求項10之非暫時性電腦可讀媒體，其中該等指令使得該器件：自一量化單元輸出該等經量化係數組中之該給定者。
  12. 如請求項11之非暫時性電腦可讀媒體，其中該等指令使得該器件：自該量化單元接收該等經量化係數組中之該給定者；對該等經量化係數組中之該給定者執行該CABAC，以將該等經量化係數組中之該給定者熵編碼為一位元流；及自一CABAC單元輸出該位元流。
  13. 如請求項10之非暫時性電腦可讀媒體，其中該等指令使 得該器件計算與一速率失真模型相關聯之拉格朗日成本函數。
  14. 如請求項13之非暫時性電腦可讀媒體，其中該等拉格朗日成本函數界定與該等經量化係數組中之該等經量化係數中之每一者相關聯的個別係數拉格朗日成本組。
  15. 如請求項14之非暫時性電腦可讀媒體，其中該等指令使得該器件：針對該等經量化係數之等於零、一最低值及一最高值之值而計算與該等經量化係數組中之該等經量化係數相關聯之該等個別係數拉格朗日成本組。
  16. 如請求項15之非暫時性電腦可讀媒體，其中該最低值係基於該視訊區塊之該等係數中之一個別者之一絕對值、一量化參數及一量化矩陣，且其中該最高值包含該最低值加一。
  17. 如請求項15之非暫時性電腦可讀媒體，其中針對該等經量化係數中之一個別者：若該等經量化係數中之該個別者相較於距該最高值更接近於該最低值，則該等指令使得該器件針對等於該最高值的值，跳過與該等經量化係數中之該個別者相關聯之一個別係數拉格朗日成本的計算。
  18. 如請求項10之非暫時性電腦可讀媒體，其中該複數個預先界定量化值包括零、一底部值及一頂部值。
  19. 一種經組態以量化用於一支援根據內容調適性二進制算術編碼(CABAC)之視訊編碼過程之一視訊區塊之係數的 裝置，該裝置包含：一量化單元，其：針對該視訊區塊而產生數目n個的經量化係數組，其中該視訊區塊包括n個係數，其中基於該視訊區塊之該等n個係數中之一特定者對應於該視訊區塊之一最後非零係數之一假定而界定該等n個經量化係數組中之每一者，且其中產生該n組之每一者包括針對被假定對應該視訊區塊之該最後非零係數之視訊區塊之該等係數中之一特定者之前的組中的至少一係數選擇複數個預先界定的量化值之一者；估計與經由該CABAC對該視訊區塊進行編碼相關聯的複數個成本，其中該等所估計之成本分別係基於該等經量化係數組中之不同者；及選擇該等經量化係數組中與一最低成本相關聯之一給定者。
  20. 如請求項19之裝置，其中該量化單元：輸出該等經量化係數組中之該給定者。
  21. 如請求項20之裝置，進一步包含一CABAC單元，該CABAC單元：接收該等經量化係數組中之該給定者；對該等經量化係數組中之該給定者執行該CABAC，以將該等經量化係數組中之該給定者熵編碼為一位元流；及輸出該位元流。
  22. 如請求項19之裝置，其中估計該等成本包含計算與一速率失真模型相關聯的拉格朗日成本函數。
  23. 如請求項22之裝置，其中一與該等經量化係數組中之該選定者相關聯之特定成本界定與該複數個成本相關聯之位元之一最低數目。
  24. 如請求項23之裝置，其中該量化單元儲存一指示位元之該最低數目的值，其與該特定成本相關聯。
  25. 如請求項22之裝置，其中該等拉格朗日成本函數界定與該等經量化係數組中之該等經量化係數中之每一者相關聯的個別係數拉格朗日成本組。
  26. 如請求項25之裝置，其中該量化單元：針對該等經量化係數之等於零、一最低值及一最高值之值，計算與該等經量化係數組中之該等經量化係數相關聯之該等個別係數拉格朗日成本組。
  27. 如請求項26之裝置，其中該最低值係基於該視訊區塊之該等係數中之一個別者之一絕對值、一量化參數及一量化矩陣，且其中該最高值包含該最低值加一。
  28. 如請求項26之裝置，其中針對該等經量化係數中之一個別者：若該等經量化係數中之該個別者相較於距該最高值更接近於該最低值，則該量化單元針對等於該最高值之值而跳過與該等經量化係數中之該個別者相關聯之一個別係數拉格朗日成本的計算。
  29. 如請求項26之裝置，其中該裝置包含一或多個電路、一 積體電路(IC)晶片或一IC晶片集。
  30. 如請求項19之裝置，其中該複數個預先界定量化值包括零、一底部值及一頂部值。
  31. 一種量化用於一支援根據內容調適性二進制算術編碼(CABAC)之視訊編碼過程之一視訊區塊之係數的器件，該器件包含：用於針對該視訊區塊產生數目n個的經量化係數組的構件，其中該視訊區塊包括n個係數，其中基於對該視訊區塊之該等n個係數中之一特定者對應於該視訊區塊之一最後非零係數之一假定而界定該等n個經量化係數組中之每一者，且其中產生該n組之每一者包括針對被假定對應該視訊區塊之該最後非零係數之視訊區塊之該等係數中之一特定者之前的組中的至少一係數選擇複數個預先界定的量化值之一者；用於估計與經由該CABAC對該視訊區塊進行編碼相關聯之複數個成本的構件，其中該等所估計之成本分別係基於該等經量化係數組中之不同者；及用於選擇該等經量化係數組中與一最低成本相關聯之一給定者的構件。
  32. 如請求項31之器件，進一步包含：用於輸出該等經量化係數組中之該給定者的構件。
  33. 如請求項32之器件，進一步包含：用於接收該等經量化係數組中之該給定者的構件；用於對該等經量化係數組中之該給定者執行該CABAC 以將該等經量化係數組中之該給定者熵編碼為一位元流的構件；及用於輸出該位元流的構件。
  34. 如請求項31之器件，其中用於估計該等成本的構件包含用於計算與一速率失真模型相關聯之拉格朗日成本函數的構件。
  35. 如請求項34之器件，其中該等拉格朗日成本函數界定與該等經量化係數組中之該等經量化係數中之每一者相關聯的個別係數拉格朗日成本組。
  36. 如請求項35之器件，進一步包含：用於針對該等經量化係數之等於零、一最低值及一最高值之值而計算與該等經量化係數組中之該等經量化係數相關聯之該等個別係數拉格朗日成本組的構件。
  37. 如請求項36之器件，其中該最低值係基於該視訊區塊之該等係數中之一個別者之一絕對值、一量化參數及一量化矩陣，且其中該最高值包含該最低值加一。
  38. 如請求項36之器件，進一步包含，針對該等經量化係數中之一個別者：在該等經量化係數中之該個別者相較於距該最高值更接近於該最低值之情況下，用於針對等於該最高值之值而跳過與該等經量化係數中之該個別者相關聯之一個別係數拉格朗日成本之計算的構件。
  39. 如請求項31之器件，其中該複數個預先界定量化值包括零、一底部值及一頂部值。
TW098100525A 2008-01-08 2009-01-08 量化用於一支援根據內容調適性二進制算術編碼(cabac)之視訊編碼過程之一視訊區塊之係數的方法、裝置、器件及電腦可讀媒體 TWI457002B (zh)

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US1983008P 2008-01-08 2008-01-08
US3045408P 2008-02-21 2008-02-21
US12/340,205 US8891615B2 (en) 2008-01-08 2008-12-19 Quantization based on rate-distortion modeling for CABAC coders

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