JP2001526004A - 電子プログラムガイドの圧縮方法および機器 - Google Patents
電子プログラムガイドの圧縮方法および機器Info
- Publication number
- JP2001526004A JP2001526004A JP50084197A JP50084197A JP2001526004A JP 2001526004 A JP2001526004 A JP 2001526004A JP 50084197 A JP50084197 A JP 50084197A JP 50084197 A JP50084197 A JP 50084197A JP 2001526004 A JP2001526004 A JP 2001526004A
- Authority
- JP
- Japan
- Prior art keywords
- data
- characters
- top box
- string
- electronic program
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 32
- 238000007906 compression Methods 0.000 title claims description 21
- 230000006835 compression Effects 0.000 title claims description 21
- 230000006837 decompression Effects 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013144 data compression Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001327708 Coriaria sarmentosa Species 0.000 description 1
- CCAZWUJBLXKBAY-ULZPOIKGSA-N Tutin Chemical compound C([C@]12[C@@H]3O[C@@H]3[C@@]3(O)[C@H]4C(=O)O[C@@H]([C@H]([C@]32C)O)[C@H]4C(=C)C)O1 CCAZWUJBLXKBAY-ULZPOIKGSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
- H04N21/2353—Processing of additional data, e.g. scrambling of additional data or processing content descriptors specifically adapted to content descriptors, e.g. coding, compressing or processing of metadata
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
- H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26283—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for associating distribution time parameters to content, e.g. to generate electronic program guide data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Library & Information Science (AREA)
- Databases & Information Systems (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Television Systems (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.電子プログラムガイドを圧縮するための方法であって、 該電子プログラムガイドを表現しかつ複数の文字から成るデータをアセンブ ルし、 該文字の各々をハフマン符号で表すのに必要なビット数を決定し、 該データから複数の候補文字列を選択し、該候補文字列が、該データのしき い値の度数以上に生起しかつ該データが少なくとも2つの文字から成るように し、 該候補文字列から成る該文字列の各々をハフマン符号で表すのに必要な少な くとも該ビット数を用いて該文字列の各々に対する節約値を計算し、 該節約値に基づいて該候補文字列から少なくとも1つの置換文字列を選択し 、 該複数の各文字および該少なくとも1つの各置換文字列の各々に対してハフ マン符号から成るハフマン表を準備し、 該ハフマン表を用いて該電子プログラムガイドを圧縮することからなる電子 プログラムガイド圧縮方法。 2.前記候補文字列の各々に対する該しきい値が、該候補文字列の文字数で除さ れる、該複数の文字のメジアン度数と等しい、請求項1の方法。 3.少なくとも10箇以上、多くとも50個未満の置換文字列が選択される、請 求項1の方法。 4.前記節約値の各々が該度数と等しく、前記候補文字列が、該候補文字列から 成る前記文字の各々をハフマン符号で表すのに必要な前記ビット数と該候補文 字列に対するハフマン符号から成る見積ビット数との差を乗じた前記データに おいて発生する、請求項1の方法。 5.前記データの各々が前記電子プログラムガイドから成る、請求項1の方法。 6.圧縮された形式の電子プログラムガイドから成る信号を受信し圧縮解除する ためのセットトップボックスであって、該電子プログラムガイドが複数の文字 から成り、 該信号を受信し、圧縮された形式の該電子プログラムガイドのディジタル表 現から成るデータを供給するための装置と、 ハフマン・ツリーを記憶するための第1の記憶空間であって、該ハフマン・ ツリーが文字列を表す少なくとも1つの終端分岐を含み、該文字列が少なくと も2つの文字から成り、 該ハフマン・ツリーを用いて圧縮解除動作を行うのに用いられるアプリケー ション・ソフトウエアを記憶するための第2の記憶空間と、 該データを記憶するための第3の記憶空間と、 該受信装置、該第1、第2、および第3の記憶空間に接続される、該アプリ ケーション・ソフトウエアが該データに対し該圧縮解除動作をさせ、該電子プ ログラムガイドを圧縮解除された形式で得るようにさせるマイクロコントロー ラとから成るセットトップボックス。 7.前記受信装置が、受信機と、復調器と、バッファとから成る、請求項6のセ ットトップボックス。 8.前記第1、第2、および第3の記憶空間と、前記マイクロコントローラとが 集積回路チップから成る、請求項6のセットトップボックス。 9.前記第1、および第2の記憶空間が不揮発性のメモリから成り、前記第3の 記憶空間が揮発性のメモリから成る、請求項6のセットトップボックス。 10.前記第1の記憶空間がROMであり、前記第2の記憶空間がEEPROMで あり、前記第3の記憶空間がRAMである、請求項9のセットトップボックス 。 11.前記第1、および第2の記憶空間が蓄電池バックアップ式のスタチックRA Mである、請求項9のセットトップボックス。 12.前記第1、および第2の記憶空間がフラッシュ・メモリから成る、請求項9 のセットトップボックス。 13.前記データがシリアルで供給され、前記マイクロコントローラが、該シリア ル・データを受け取る入力ピンから更に成る、請求項6のセットトップボック ス。 14.前記データがパラレルで供給され、前記マイクロコントローラが、該パラレ ル・データを受け取る入力ピンから更に成る、請求項6のセットトップボック ス。 15.アナログ・チューナから更に成る、請求項6のセットトップボックス。 16.ディジタルデマルチップレクサから更に成る、請求項6のセットトップボッ クス。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/476,208 US5548338A (en) | 1995-06-07 | 1995-06-07 | Compression of an electronic programming guide |
US08/476,208 | 1995-06-07 | ||
PCT/US1996/007985 WO1996041423A1 (en) | 1995-06-07 | 1996-05-30 | Compression of an electronic programming guide |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001526004A true JP2001526004A (ja) | 2001-12-11 |
JP3299760B2 JP3299760B2 (ja) | 2002-07-08 |
Family
ID=23890940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50084197A Expired - Lifetime JP3299760B2 (ja) | 1995-06-07 | 1996-05-30 | 電子プログラムガイドの圧縮方法および機器 |
Country Status (10)
Country | Link |
---|---|
US (1) | US5548338A (ja) |
EP (1) | EP0830740A1 (ja) |
JP (1) | JP3299760B2 (ja) |
KR (1) | KR19990022677A (ja) |
CN (1) | CN1193428A (ja) |
AU (1) | AU712114B2 (ja) |
BR (1) | BR9609128A (ja) |
CA (1) | CA2222293A1 (ja) |
PL (1) | PL327243A1 (ja) |
WO (1) | WO1996041423A1 (ja) |
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1995
- 1995-06-07 US US08/476,208 patent/US5548338A/en not_active Expired - Lifetime
-
1996
- 1996-05-30 CA CA002222293A patent/CA2222293A1/en not_active Abandoned
- 1996-05-30 EP EP96919014A patent/EP0830740A1/en not_active Withdrawn
- 1996-05-30 PL PL96327243A patent/PL327243A1/xx unknown
- 1996-05-30 AU AU61467/96A patent/AU712114B2/en not_active Ceased
- 1996-05-30 WO PCT/US1996/007985 patent/WO1996041423A1/en not_active Application Discontinuation
- 1996-05-30 JP JP50084197A patent/JP3299760B2/ja not_active Expired - Lifetime
- 1996-05-30 KR KR1019970709118A patent/KR19990022677A/ko not_active Application Discontinuation
- 1996-05-30 BR BR9609128A patent/BR9609128A/pt unknown
- 1996-05-30 CN CN96194480A patent/CN1193428A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CA2222293A1 (en) | 1996-12-19 |
BR9609128A (pt) | 1999-08-24 |
CN1193428A (zh) | 1998-09-16 |
US5548338A (en) | 1996-08-20 |
PL327243A1 (en) | 1998-12-07 |
EP0830740A1 (en) | 1998-03-25 |
WO1996041423A1 (en) | 1996-12-19 |
JP3299760B2 (ja) | 2002-07-08 |
AU712114B2 (en) | 1999-10-28 |
KR19990022677A (ko) | 1999-03-25 |
AU6146796A (en) | 1996-12-30 |
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