CN1423899A - 自适应视频图象信息处理系统 - Google Patents

自适应视频图象信息处理系统 Download PDF

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CN1423899A
CN1423899A CN00818464A CN00818464A CN1423899A CN 1423899 A CN1423899 A CN 1423899A CN 00818464 A CN00818464 A CN 00818464A CN 00818464 A CN00818464 A CN 00818464A CN 1423899 A CN1423899 A CN 1423899A
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video image
image information
information
format
signal
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CN1206861C (zh
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卡尔·F·霍兰德
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InterDigital CE Patent Holdings SAS
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Thomson Licensing SAS
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Priority claimed from US09/712,539 external-priority patent/US7071995B1/en
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Abstract

视频图象信息在包括条件访问信息的信号内被接收到。条件访问信息与多个记录、重现和显示视频图象信息的图象分辨率格式之一相关。接收的信号内的条件访问信息被解码。用于记录重现和显示视频图象信息的至少一个操作的格式相应于解码的条件访问信息被自适应的选择。然后,使用选择的格式对视频图象信息进行处理。条件访问信息可以进一步包括表明允许记录的视频图象信息重现的预定时间间隔的信息。

Description

自适应视频图象信息处理系统
                         技术领域
本发明涉及对与包括条件访问信息的信号一同接收到的视频图象信息的记录、重现和显示的格式进行的选择，条件访问信息决定视频图象信息的记录、重现和显示的格式。
                         背景技术
用于如电缆用户机顶盒解码器的用户单元的条件访问系统在现有技术中是已知的。传统地通过下载一个或多个存储在解码器内的授权等级得到条件访问。存储的授权等级可以由位图或一列专用多位编码或它们二者的组合表示。正常加扰以避免未授权用户对其的访问的每个接收的预约节目包括识别相关节目的条件访问信息或授权编码。如果条件访问信息相应于存储的位图内的授权等级或存储列表的用户授权等级，用户的解码器内部的解扰电路将可以解扰供用户观看的信号。如果接收的条件访问信息不与任何存储的授权等级相匹配，将禁止或防止解扰所伴随的节目。
这种条件访问系统缺少利用新一代的数字解码机顶盒所支持的特点和功能而得到的操作的灵活性。因此希望机顶盒和其它的解码系统可以基于个人品味和用户的视频设备的功能为用户提供对视频图象的记录、重现和/或显示的附加的定价和预约选择。这里所描述的系统满足了这些需求。
                         发明内容
视频图象信息在包括条件访问信息的信号内被接收到。条件访问信息与多个记录、重现和显示视频图象信息的图象分辨率格式之一相关。接收的信号内的条件访问信息被解码。响应于解码的条件访问信息，自适应地选择用于记录重现和显示视频图象信息的至少一个操作的格式。然后，使用选择的格式对视频图象信息进行处理。条件访问信息可以进一步包括表明允许记录的视频图象信息被重现的预定时间段的信息。
                        附图说明
图1示出了根据本发明的原理的有利于自适应的数据恢复和解码器操作的垂直消隐间隔(VBI)的数据格式。
图2示出了根据本发明的原理的插入特定的首标和有效载荷数据的结构的图1的垂直消隐间隔(VBI)的数据格式。
图3示出了根据本发明的原理的包括使用图1的VBI辅助数据格式以基于复制保护信息选择解码器处理功能的视频系统，其包括高清晰度(HD)视频解码器、视频监视器和VCR。
图4示出了根据本发明的原理的、使用图1的VBI辅助数据格式的、以选择更多解码器配置的、与图3的系统类似的视频系统。
图5示出了根据本发明的原理的、使用用在另一个解码器配置内的图1的VBI辅助数据格式的、与图3的系统类似的视频系统。
                    具体实施方式
图1示出了便于自适应的数据恢复和解码器操作的垂直消隐间隔(VBI)的数据格式。该数据格式有利于不同数据检测和恢复模式下的自适应的解码器多方式操作。数据格式还有利于使用数据位周期，该数据位周期容纳用与不同标准相关的时钟频率编码的数据。特别地，图1的数据格式使用半个字节长度的正交(即“1010”位模式)基准符号起始脉冲(图1的项目10)，其基本上开始于水平视频线的有效视频信息的开始(图1的项目29)。这种定义开始于有效视频信息的开始的正交基准符号的使用使得解码器可以以两种不同的恢复方式中的任意一种来检测和恢复数据。这种数据格式使得解码器可以通过下述任意一种方式恢复数据：(a)例如，使用锁相环跟随与正交基准符号同步的脉冲检测，或(b)不使用在前的锁相环同步的、基于跟随有模拟视频信号的水平同步脉冲的基准符号的已知(有效视频信息的)开始时间的行锁定脉冲检测。另外，基准符号10的双脉冲(即1010)位模式提供优于如以EIAJ CPR-1204-1标准的VBI数据信号基准脉冲序列为例的单脉冲(即10)位模式的改进的锁相环同步能力。这是因为与单脉冲基准符号模式相比，基准符号提供用于检测和同步中的具有多个脉冲边缘的检测器电路。
图1的数据格式还使用数据位周期，该数据位周期容纳使用与不同标准相关的时钟频率编码的数据。特别地，有利地选择图1的数据格式的位周期以包含与第一数据格式相关的第一时钟周期的第一整数倍和与第二数据格式相关的第二时钟周期的不同的第二整数倍。在图1所示的数据格式中，辅助数据位周期选择为下面的倍数：(a)与EIA 770.1和EIA 770.2视频标准相关的(并与MPEG系统标准ISO 13818-1部分2.5.2.1相关的)27MHz时钟周期的20倍，(b)与EIA 770.3视频标准相关的74.25MHz时钟周期(图1的项目31)的55倍。图1的数据格式的所得到的选择的位周期长度大约为741纳秒。在图1中，项目33的辅助数据位周期包括在多个数字视频系统中用作视频时钟的81MHz的时钟周期的60倍。并且，由于81MHz时钟周期是27MHz时钟周期的整倍数(即3倍)，因此，图1的数据格式的位周期容纳用与不同标准相关的81MHz、27MHz和74.25MHz(和其它整倍数)时钟频率编码的数据。
图1的数据格式的多标准兼容的位周期使得辅助数据可以由使用多个不同标准中任意一个相关的时钟频率如EIA 770.1、EIA770.2或MPEG标准的27MHz的频率或EIA 770.3标准的74.25MHz的频率进行操作的设备进行编码。插入了模拟视频信号VBI(并与图1的格式兼容的)后得到的辅助数据可以由解码器恢复和解码，而不必知晓原始装置所使用的标准。
图1的数据格式的特点有利于通过(a)锁相环同步脉冲检测和(b)与锁相环同步无关的行同步脉冲检测之一进行自适应的数据恢复。这些特点还便于对由用不同视频编码标准(如EIA770.1、EIA770.2、EIA770.3或MPEG标准)进行操作的设备提供的辅助数据的自适应解码。另外，正交基准符号和多标准兼容的位周期的组合为诸如电视(包括模拟、数字和高清晰度TV(HDTV))、VCR、数字视频盘(DVD)播放器和机顶盒等价格敏感的消费设备间的相互通信提供了显著的灵活性、适应性和简单性。
图1的数字格式支持多数据种类的通信和包括字幕、条件访问信息、复制保护信息、配置信息、显示格式/标准识别数据、描述数据和控制信息的服务。该信息在VBI内的在水平行上，如2H显示系统(使用基本上两倍于NTSC水平行处理速率的显示系统)的42行，以图1所示的辅助数据格式中传送。此外，其可以插入到1H或2.14H或其它行处理速率的系统内的这一行或另一行。辅助数据格式包括识别辅助数据的有效载荷的目标(destination)服务的首标字节(图1的项目15)或识别有效载荷的目标的地址。地址包括7位(项目25)和一个奇偶校验位(项目27)。地址首标内的奇偶校验位使得误差检测可以在各首标字节内执行。地址位(项目25)可以包括服务标识符，如识别作为字幕、配置、显示格式、视频标准、条件访问、复制保护、说明或其它控制信息的有效载荷数据。此外，地址位可以包括其它与有效载荷数据相关的标识符，奇偶校验位可以被省略。
辅助数据格式还包括两个有效载荷字节(图1的项目20)，其可以用于如EIA770.3标准的通信。在其它实施例中，数据格式结构可以包括多个首标和有效载荷字节。首标地址或服务标识符(项目15)与两字节的有效载荷(项目20)相关。一个或多个有效载荷数据位还可以分配用在检测各有效载荷数据段内的有效载荷误差(如单个字节或两个字节一起)使用的奇偶校验位。有效载荷数据还可以用于传送多个视频帧内的大量消息，该视频帧在多个两字节段内被传送。为此，首标(或在其它实施例内的有效载荷)包括表明消息正在多个水平行辅助数据段内传送和使段可以组合为一条消息的信息。另外，误差检测和/或校正编码可以与有效载荷数据一同传送，以确认有效并校正消息。
图2示出了图1插入特定的首标和有效载荷数据结构的垂直消隐间隔(VBI)的数据格式。图2示出了用于如EIA770.3标准通信的单字节有效载荷。在图2中，第一有效载荷字节分配用做服务标识符(项目40)。从而，地址(项目15)和服务标识符(项目40)二者都与单字节有效载荷(项目20的剩余字节)相关。结果，有效载荷数据可以由各种设备以不同方式被灵活地处理。此外，首标字节(项目15)和有效载荷(项目20)的一个字节可以用于提供单独的16位地址或服务标识符。从而扩大可用的标识符和地址的范围。
辅助数据在Y Pr Pb亮度-色度的格式视频信号内的亮度信息(Y)上被编码。辅助数据还可以同样在RGB格式的视频信号内的色彩信号的每一个上被编码或在色彩信号的一个或两个上被传送。此外，Y Pr Pb格式的视频信号或RGB的每个分量可以用于传送不同的辅助数据。辅助数据可以类似地在其它格式的视频信号的分量视频信号内进行传送。
图3示出了使用图1的VBI辅助数据格式以基于复制保护信息选择解码器处理功能的视频系统，其包括高清晰度(HD)视频解码器110、视频监视器(如TV)100和VCR 105。在其它实施例中，解码器110和监视器100可以组合为一个单元。复制保护信息与复制发生管理系统(CGMSA)文件(包括CGMS-模拟和CGMSD-数字版本)兼容，参考1996年3月14日要向第104委员会(the104th Congress)提交的视频家庭记录操作(Video Home Recordjng Act)(尚未提交)，但是该复制保护信息可以有选择地与其它格式相一致。在图3的系统中，图1所示的辅助数据格式用于自适应的传送和更新用于不同视频显示格式和模式的复制保护配置信息。特别地，辅助数据用于为不同显示格式或记录模式提供不同显示和记录特许。该不同的显示格式可包括例如高清晰度TV(HDTV)或标准清晰度TV(SDTV)格式。不同记录模式可包括如涉及记录文本、字幕、网页或与各节目相关的画中画(PIP)图象的模式。图1中所示的辅助数据格式还可以用于在解码器和显示或记录设备之间或用于最优化视频和音频重现的其它设备之间传输其它控制信息。该附加的控制信息可以包括音频控制和节目说明数据、家长分级信息以及日期和时间信息。由此，简单的监视器就可以看到这些数据并自动优化和配置其显示和音频重现功能。
在图3所示的系统中，视频解码器110自适应地解码并对接收到的广播高清晰度视频数据进行转换，以提供高清晰度(HD)的数字的MPEG兼容的视频数据、标准清晰度(SD)的数字的MPEG兼容的视频数据或模拟的复合视频信号以用于在VCR 105上进行存储。使用由解码器110输出的NTSC兼容的复合视频信号的VBI内的辅助数据(由图1中所示的格式)内传送的控制和配置信息，解码器110为VCR 105配置记录模式和复制保护处理模式。应当注意，复合视频信号内的辅助数据有利于用在诸如在包括以数字MPEG兼容的HD信号格式或以数字MPEG兼容的SD信号格式或作为模拟复合视频信号记录节目的模式的所有模式下对VCR 105进行配置中。
在所示例的记录模式下，解码器110提供代表用于向VCR 105进行记录的节目的高清晰度MPEG兼容的数字视频数据。解码器110将VCR 105配置为可以记录高清晰度MPEG数据，其使用在由解码器110向VCR 105输出的NTSC兼容的复合视频的VBI内的辅助数据内传送的配置数据以高清晰度格式进行接收。VCR 105是多功能单元，可以在用于记录和回放的不同视频格式间进行转换。为此，VCR 105包括用于将SD视频数据转换为HD视频数据的上采样插入器和用于将HD视频数据转换为SD视频数据的下采样插入器。VCR 105还包括MPEG解码/编码以及模数和数模转换以及采样功能，以在数字HD和SD数据和模拟复合视频数据间进行转换。响应从解码器110接收到的配置和复制保护信息，VCR 105选择信号记录格式并将输入信号数据(HD、SD或复合模拟)转换为希望的记录格式。VCR 105还响应复制保护信息中断禁止素材(material)的记录或回放。
响应从解码器100接收到的复制保护信息，VCR 105的信号格式转换能力使得VCR 105适应地选择用于记录或回放的信号格式。从而，基于反映用户指定的费用和条件访问选项的复制保护数据，VCR 105有利于选择回放或记录模式(和相关的显示格式)和随后的复制限制(如禁止随后的复制、允许一个随后的复制或不限制随后的程序复制)。结果，可以基于用户预先选择的付费选项只允许用户记录特定格式的节目和观看特定格式的回放节目。该特定格式可包括如HD、SD或模拟信号格式之一。同样，基于用户预先选择的付费选项，复制保护数据可以允许使用基于时间的限制。该限制使用户在如仅三个月的限定的期间内观看回放的节目。另外，复制保护数据可以允许基于时间的和信号格式的限制的组合，例如使得以一种格式(如HD格式)在特定期间(如3个月)内的和以不同格式(如SD格式)在其它期间(如随后一年)的节目可以回放和显示。
应当注意，其它实施例的VCR 105可以接收和处理用于记录的MPEG SD视频数据或模拟复合视频信号。并且，VCR 105可以包括进行不同显示格式之间的格式转换的能力，该不同的显示格式包括用于记录或回放的1H行处理速率格式、2H行处理速率格式和2.14H行处理速率格式和其它格式。VCR105还可以包括通过使用附加的采样速率转换器内插功能提供所希望的用于记录操作或回放的隔行扫描格式(如1920×720像素分辨率)或顺次扫描格式(如1920×720像素分辨率)的能力。另外，VCR 105的适应的转换和复制保护功能可以有选择地安排在分离的单元内，如解码器110或包括解码器110和VCR 105的功能的单独的组合单元。
图4示出了使用图1的VBI辅助数据格式的以进一步选择解码器配置的与图3的系统类似的视频系统。图4所示的系统包括使用图1所示的VBI辅助数据格式的高清晰度(HD)视频解码器130、视频监视器(如TV)100和VCR129，该格式以基于复制保护信息选择解码器处理功能。解码器130有利于向VCR 129和视频监视器100提供1H和2H的行处理格式信号。这使得解码器130使用图1所示的辅助数据格式配置VCR 129(以1H或2H复合信号VBI传送的)以处理1H(如NTSC格式)或2H(如1920×1080像素分辨率)的视频和音频格式。另外，VCR129包括在用于记录或回放的1H行处理速率格式、2H行处理速率格式(或2.14H行处理速率格式)之间进行转换的能力。此外，该转换可以在解码器130内执行。
图5示出了利用在另一个解码器配置内的使用图1的VBI辅助数据格式的与图3的系统类似的视频系统。图5所示的系统包括使用图1所示的VBI辅助数据格式的2H行处理速率格式的高清晰度(HD)视频解码器130、1H行处理速率显示格式视频监视器(如TV)100和VCR125。在图5所示的系统中，解码器130使用1H行处理速率(如NTSC兼容的)的模拟复合视频信号的VBI内传送的辅助数据与监视器100通信并对监视器100进行配置。另外，解码器130使用2H行处理速率(如EIA770.1兼容的)的模拟复合视频信号的VBI内传送的辅助数据与VCR 125通信并对VCR 125进行配置。在示例的记录模式中，解码器130提供表示高清晰度节目的2H行处理速率的兼容的模拟复合视频给VCR 125用于记录。解码器110还配置VCR 125，以使其以2H行处理速率格式记录该节目。在回放模式下，VCR 125将记录的2H行处理速率格式的视频转换为1H行处理速率格式的视频，以输出到监视器100用于显示。其是响应回放命令的用户开始信息和从解码器130传送的配置信息而执行的，其识别作为H格式监视器的显示监视器。此外，VCR 125可以向解码器130传送2H行处理速率的视频以由解码器130转换为1H行处理速率格式的视频并在监视器100上显示。在另一实施例中，响应从解码器130传送的1H行处理速率信号内的配置信息，VCR 125将从解码器130得到的2H行处理速率格式的视频转换为1H行处理速率格式以便以1H格式记录的。响应回放命令的用户开始操作，记录的1H行处理速率的视频被输出到用于显示的监视器100。
图1和图2所示的辅助数据构成并不限制以1H、2H或2.14H行处理速率的模拟复合视频进行传送，而是可以以使用任何行处理速率的模拟或数字视频信号进行传送。另外，辅助数据不仅用于图3-5中所描述的系统内的控制目的，还可以用于其它系统配置。另外，其它辅助数据结构可以根据本发明的在图1和图2的格式的多标准兼容特征和适应地数据恢复的原理具体得到。

Claims (29)

1、一种为显示在包括条件访问信息的信号内接收到的视频图象信息选择格式的方法，所述方法包括下述步骤：
a)接收所述包括视频图象信息和与多个图象分辨率格式之一相关的条件访问信息的信号；
b)解码接收的信号内的所述条件访问信息；
c)响应所述解码的条件访问信息，自适应地选择图象分辨率格式；和
d)使用所述选择的图象分辨率格式处理所述视频图象信息。
2、根据权利要求1所述的方法，其中，所述图象分辨率格式的选择是响应于决定用户权利以选择所述多个可用的图象分辨率格式之一的所述解码的条件访问信息而进行的。
3、根据权利要求1所述的方法，其中，所述图象分辨率格式是下面的格式之一：
i)标准清晰度格式；和
ii)高清晰度格式。
4、根据权利要求1所述的方法，还包括在记录介质上以所述选择的图象分辨率格式记录所述视频图象信息的步骤。
5、根据权利要求4所述的方法，还包括在显示器上以所述选择的图象分辨率格式重现所述记录的视频图象信息的步骤。
6、根据权利要求1所述的方法，其中，所述接收的信号的所述视频图象信息作为数字信号在第一通道内进行传输。
7、根据权利要求6所述的方法，还包括接收在第二通道内传输的用于控制所述视频图象数据的处理的辅助数据的步骤。
8、根据权利要求7所述的方法，其中，所述辅助数据作为模拟视频信号传输。
9、根据权利要求1所述的方法，其中所述多个图象分辨率格式的每一个都与相应的收费价格相关，并进一步包括根据与选定的所述多个图象分辨率格式之一相关的收费价格向用户收费的步骤。
10、一种为显示在包括复制保护信息的信号内接收到的视频图象信息选择格式的方法，所述方法包括下述步骤：
a)接收所述包括视频图象信息和与多个显示格式之一相关的复制保护信息的信号；
b)解码接收的信号内的所述复制保护信息；
c)响应所述解码的复制保护信息，自适应地选择用于在显示器上显示所述视频图象信息的格式；和
d)使用所述选择的显示格式处理所述视频图象信息。
11、根据权利要求10所述的方法，其中，所述显示格式的选择是响应于决定用户权利以选择所述多个可用的显示格式之一的所述解码的复制保护信息而进行的。
12、根据权利要求10所述的方法，其中，所述显示格式是下面的格式之一：
i)标准清晰度格式；和
ii)高清晰度格式。
13、根据权利要求10所述的方法，还包括在记录介质上以由所述解码的复制保护信息决定的格式记录所述视频图象信息的步骤。
14、根据权利要求13所述的方法，还包括在显示器上以由所述解码的复制保护信息决定的所述格式重现所述记录的视频图象信息的步骤。
15、根据权利要求10所述的方法，其中，所述接收的信号的所述视频图象信息作为数字信号在第一通道内进行传输。
16、根据权利要求15所述的方法，还包括接收在第二通道内传输的用于控制所述视频图象数据的处理的辅助数据的步骤。
17、根据权利要求16所述的方法，其中，所述辅助数据作为模拟视频信号传输。
18、根据权利要求10所述的方法，其中所述多个显示格式的每一个都与相应的收费价格相关，并进一步包括根据与选定的所述多个显示格式之一相关的收费价格向用户收费的步骤。
19、一种为记录在包括复制保护信息的信号内接收到的视频图象信息的选择格式的方法，所述方法包括下述步骤：
a)接收所述包括视频图象信息和与多个记录格式之一相关的复制保护信息的信号；
b)解码接收的信号内的所述复制保护信息；
c)响应所述解码的复制保护信息，自适应地选择在记录介质上记录所述视频图象信息的格式；和
d)使用所述选择的记录格式处理所述视频图象信息。
20、根据权利要求19所述的方法，其中，所述记录格式的选择是响应于决定用户权利以选择所述多个可用的记录格式之一的所述解码的复制保护信息而进行的。
21、根据权利要求19所述的方法，其中，所述记录格式是下面的格式之一：
i)标准清晰度格式；和
ii)高清晰度格式。
22、根据权利要求19所述的方法，还包括在记录介质上以所述选定的记录格式记录所述处理的视频图象信息的步骤。
23、根据权利要求22所述的方法，还包括在显示器上以所述选定的记录格式重现所述记录的视频图象信息的步骤。
24、根据权利要求19所述的方法，其中，所述复制保护信息还包括表明可以重现所述处理的视频图象信息的时间段的信息。
25、根据权利要求24所述的方法，其中，所述时间段是响应于决定用户权利以选择所述多个可用记录格式之一的所述解码的复制保护信息而设定的。
26、根据权利要求19所述的方法，其中，所述接收的信号的所述视频图象信息作为数字信号在第一通道内进行传输。
27、根据权利要求26所述的方法，进一步包括接收在第二通道内传输的用于控制所述视频图象数据的处理的辅助数据的步骤。
28、根据权利要求27所述的方法，其中，所述辅助数据作为模拟视频信号传输。
29、根据权利要求19所述的方法，其中所述多个记录格式的每一个都与相应的收费价格相关，并进一步包括根据与选定的所述多个记录格式之一相关的收费价格向用户收费的步骤。
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