CN1205805C - Atsc电视接收机中频道扫描和频道转换的时延的减少 - Google Patents
Atsc电视接收机中频道扫描和频道转换的时延的减少 Download PDFInfo
- Publication number
- CN1205805C CN1205805C CNB988092905A CN98809290A CN1205805C CN 1205805 C CN1205805 C CN 1205805C CN B988092905 A CNB988092905 A CN B988092905A CN 98809290 A CN98809290 A CN 98809290A CN 1205805 C CN1205805 C CN 1205805C
- Authority
- CN
- China
- Prior art keywords
- channel
- coupled
- tuner
- information flow
- information
- 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.)
- Expired - Lifetime
Links
- 230000008859 change Effects 0.000 title description 6
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000000873 masking effect Effects 0.000 claims abstract description 3
- 108091006146 Channels Proteins 0.000 claims description 232
- 239000000284 extract Substances 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 6
- 230000009897 systematic effect Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000003466 anti-cipated effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 description 1
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/20—Analysis of motion
- G06T7/223—Analysis of motion using block-matching
-
- 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
- H04N19/103—Selection of coding mode or of prediction mode
-
- 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
- H04N19/127—Prioritisation of hardware or computational resources
-
- 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
-
- 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
- H04N19/186—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 colour or a chrominance component
-
- 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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
-
- 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
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
- H04N19/426—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements using memory downsizing methods
- H04N19/428—Recompression, e.g. by spatial or temporal decimation
-
- 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/523—Motion estimation or motion compensation with sub-pixel accuracy
-
- 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/59—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
-
- 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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
-
- 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
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20048—Transform domain processing
- G06T2207/20052—Discrete cosine transform [DCT]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computing Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Circuits Of Receivers In General (AREA)
- Television Receiver Circuits (AREA)
- Television Systems (AREA)
Abstract
用于在MPEG类信息流接收机中,如ATSC或DVB电视接收机,掩蔽节目选择时延的方法和装置(图1)。一个信息流接收机接收由包含节目传输流的MPEG类系统流构成的VSB或QAM调制信号。在频道扫描工作模式中,一系列被识别的节目传输流(即,频道)被顺序地从一个或多个系统流中提取出来(图2)。在频道转换工作模式中,如果期望频道是顺序扫描频道中的一个,那么,当期望频道在进行调谐、解调和多路分解操作的同时,所存储的I帧被取出并耦合到解码器(图3)。以这种方式,调谐、解调和多路分解操作的固有时延在一定程度上被掩蔽了。而且,通过存储与预期的下一频道相关的调谐和解调参数,获取频道的实际时间被减少了。
Description
本发明声明先前提交于1997年9月26日的美国临时申请号60/060112的权利要求,并通过完整引用在此并入。
技术领域
本发明广义上说是关于电视接收机的,具体的说是关于可接收类似ATSC电视信号的电视接收机的。
发明背景
消费者已经习惯了当今NTSC(国家电视制式委员会)电视接收机的快速频道转换能力。此类电视接收机通过改变调谐器频率(即,调谐)并获取调制于调谐器频率(即,同步)的电视信号来转换频道。在NTSC电视接收机频道转换操作中主要的时延是改变调谐器频率所需的时间。而图象同步信息的获取是极其迅速的,因为在NTSC电视信号中水平和垂直同步信息出现频繁(即,分别为63微秒和33毫秒)。
在不远的将来,消费者所使用的电视接收机的类型将会迅速改变。特别地,未来的电视接收机被期望在实质实现上与先进电视制式委员会(ATSC)所制定的传输标准相一致。在欧洲,一个相似的标准是数字视频广播(DVB)标准。压缩的数字视频系统在ATSC数字电视标准文件A/53中有描述,这里通过引用并入。而且,运动图象专家组(MPEG)已经公布了关于数字数据传输系统的几个标准。首先,是参照ISO/IEC11172标准的MPEG-1,这里通过引用并入。然后,是参照ISO/IEC13818标准的MPEG-2,这里通过引用并入。
不幸的是,在遵守ATSC类标准的电视接收机中转换频道注定要比上述NTSC过程慢。具体的说,为获取一个电视信号并从信号中产生一系列的图象,一台ATSC电视接收机必须顺序地执行很多步。第一步,调谐器频率必须调整到分配给感兴趣频道的频率。第二步,为开始产生有效输出数据,VSB或QAM解调器必须完成载波恢复过程。第三步,残留边带(VSB)或正交幅度调制(QAM)解调器必须获取数据域和数据段同步信息。第四步,传输解码器必须获取包同步信息,然后为把视频和音频数据传送给不同的解码器,对所谓节目映射表(PMT)和节目存取表(PAT)解码。第五步,视频速率缓存器必须装载对应于感兴趣频道的视频数据。第六步,视频解码器开始进行可变长解码(VLD),把比特流变换成适合后续解码工作的指令和数据。第七步,在图象解压缩开始之前,视频解码器必须等待数据流中帧内编码帧(I帧)的出现。I帧出现的频率由电视广播设备的压缩编码器控制,尽管该频率可能是每发送一个12帧的图象组(GOP)有一个I帧。因此,平均时延仅视频获取一项就在6帧的数量级(大约200ms),而最坏的情况仅视频获取一项所需时延在12帧的数量级(大约400ms)。这样高的频道转换时延被认为对消费者来说是不能接受的。
因此,在ATSC电视接收机内能够提供快速或看似快速的频道转换或频道获取能力的方法和装置看起来是很有必要的。
发明内容
本发明是在MPEG类信息流接收机,如ATSC或DVB电视接收机中,掩蔽节目选择时延的一种方法和装置。
本发明提供一种用于掩蔽信息流接收机节目选择时延的方法,所述方法包含以下步骤:在扫描工作模式中,至少提取每一个被识别的信息流序列的一部分,每个信息流对应一个节目;在所述扫描工作模式中,存储每一个被识别的信息流序列的每个被提取的部分;在节目选择工作模式中,把期望信息流的识别标识与所述被识别的信息流序列的识别标识作比较;在上述标识的合适的比较情况下:初始化一个信息流选择过程,所述选择过程产生所述期望信息流;取出信息流中被存储的部分,与期望信息流进行合适的比较;把上述取出的信息流部分耦合到解码器;把来源于上述信息流选择过程的上述期望信息流耦合到上述解码器。
本发明提供一种在接收机中用于快速转换频道的装置,包括:一个第一频道选择器,用于从一系列可用频道中选择第一个频道;一个解码器,耦合到上述第一频道选择器,用于对与上述第一频道相关的信息流进行解码,产生解码后的信息流;一个第二频道选择器,用于选择一系列被识别频道中的每一个,上述被识别频道中的每一个都至少与一个频道识别标识和一个频道调谐参数相关;一个处理器,被耦合到上述第二频道选择器和上述解码器,用于至少存储和提取上述选择的每一频道的一部分;其中,在频道转换工作模式中:上述处理器,根据对期望新频道的频道识别标识与上述被识别频道序列的频道识别标识所做的合适的比较,把上述存储的一个上述被识别的频道部分耦合到上述解码器;上述第一频道选择器选择上述期望频道作为上述第一频道;而且上述解码器开始对上述信息流解码。
具体的说,信息流接收机接收由包含节目传输流的MPEG类系统流构成的VSB或QAM调制信号。在频道扫描工作模式中,一系列被识别的节目传输流(即,频道)顺序地从一个或多个系统流中提取出来。每个被提取的节目传输流的一部分,如包含在基本视频流内的帧内编码视频帧,被取出并存入存储器。在频道转换工作模式中,如果期望频道是已被顺序扫描的频道中的一个,则当通过调谐、解调和多路分解过程重新获取期望频道时,所存储的I帧被取出并耦合到解码器。以这种方式,调谐、解调和多路分解过程所固有的时延在一定程度上被掩蔽。而且,通过存储与下一个预期频道相关的调谐和解调参数,获取频道所需的实际时间被减少了。
附图简述
通过考虑如下与附图相关的细节描述,本发明的讲解可以很容易被理解。附图中,
图1根据本发明给出了一个ATSC接收机100的顶层框图。
图2给出了根据本发明并适用于图1所示ATSC接收机的频道扫描程序的流程图。
图3给出了根据本发明并适用于图1所示ATSC接收机的频道转换程序的流程图。
为有助于理解,在可能的地方,使用了相同的参考号码来标注不同图中的同一单元。
实施本发明的最佳实施方式
本发明将在ATSC电视接收机的范围内描述。但是,对于技术娴熟者而言,很显然,本发明可应用于诸如DVB MPEG-1,MPEG-2以及其他信息流的任何分段信息流接收机中。
图1根据本发明给出了一个ATSC接收机100的顶层框图。接收机100包括一个由与输入/输出(I/O)口72和存储器单元76连接的中央处理单元(CPU)74组成的控制器70。控制器利用I/O口72接收来自如遥控单元(未给出)的用户输入命令,并产生一系列控制信号去控制接收机100的不同部分。用户输入命令包括标准电视接收机命令,如转换频道、改变音量、调节图象等等。存储器单元76用于在内部存储CPU74所使用的程序和相关的数据结构,包括一个频道扫描程序200,一个频道转换程序300和一个相关扫描清单150。
频道扫描程序200将在下面根据图2详述。简要地,当运行频道扫描程序200时,控制器70触发接收机的一个辅助处理部分,来重复调谐、解调和解码在扫描清单150内被识别的四个频道一组的部分或全部频道。至少每个被解码的频道的一部分(举例来说,一个视频I帧)为后续提取而被存储。
频道转换程序300将在下面根据图3详述。简要地,当运行频道转换程序300时,控制器70触发接收机的主处理部分,用以对与用户输入(举例来说,一个频道转换命令)相符的新频道进行调谐、解调和解码。如果该频道是包括在扫描清单50内的频道之一,则控制器70触发辅助处理部分来获取与新频道相关的最近存储的I帧。所获取的I帧随后被解码并显示。同时,新频道的音频部分被解码并送到音频输出设备。虽然在ATSC电视接收机频道转换中真实的时延是固有的,但这种方法制造了一种快速反应的表象。
参考图1,RF源5(例如,天线或有线电视分布网)产生包含一系列经残留边带(VSB)调制、正交幅度调制(QAM)或其他适当调制方式调制的电视信号的射频(RF)信号。所产生的RF电视信号耦合到第一调谐器10A和第二调谐器10B。第一调谐器10A根据控制信号TA,下变频所期望的电视信号产生第一中频(IF)电视信号IFA。第一解调器15A,例如,VSB或QAM解调器,解调第一中频(IF)电视信号IFA,产生第一MPEG类系统流SA。第一调谐器10A和第一解调器15A形成第一调谐器/解调器对。
第二调谐器10B根据控制信号TB,下变频所期望的电视信号产生第二中频(IF)电视信号IFB。第二解调器15B,例如,VSB解调器,解调第二中频(IF)电视信号IFB,产生第二MPEG类系统流SB。第二调谐器10B和第二解调器15B形成第二调谐器/解调器对。第一和第二调谐器/解调器对实际上以同样的方式工作。
第一和第二系统流SA、SB分别耦合到第一开关SW20的第一I1和第二I2输入端。第一开关SW20根据来自控制器70的控制信号SW1,把第一和第二系统流SA、SB中的一个作为第一输出流SO1耦合到第一输出端O1。第一开关SW20根据来自控制器70的控制信号SW1,把第一和第二系统流SA、SB中的一个作为第二输出流SO2耦合到第二输出端O2。第一开关SW20可以把输入流SA、SB中的任何一个耦合到输出端O1、O2的任何一个(或全部)。
第一和第二系统流SA、SB由可以包含一个或多个MPEG类节目流的MPEG类系统流组成。MPEG类节目流类似于NTSC频道,典型的节目流传送单一节目的视频和音频部分,如电影或其他视听节目。每个节目流由一系列与所传送的视听节目的视频和音频部分相关的基本流组成。
主传输多路分解器35从第一开关20接收第一输出流SO1。主传输多路分解器35根据来自控制器70的控制信号MAIN,从接收的系统流SO1中提取一个特定的节目流。与所提取节目流相关的基本视频流V1耦合到第二开关40。与所提取节目流相关的基本音频流A1耦合到音频解码器60。音频解码器60对基本音频流解码并把解码后的音频信息耦合到音频驱动电路(未给出)。
辅助多路分解和处理单元30从开关20接收第二输出流SO2。辅助多路分解和处理单元30根据来自控制器70的控制信号AUX,工作在画中画、频道扫描或频道转换模式。应该注意用于实现PIP处理器的电路(或软件)与用于产生本发明中频道扫描和频道获取功能的电路(或软件)非常相近。因此辅助多路分解和处理单元30将在PIP处理环境下描述。然而,在应用本发明时,下述PIP操作不是必须的。
在PIP工作模式,辅助多路分解和处理单元30接收系统流SO2,从接收的系统流SO2中多路分解出一个期望的节目流,并从多路分解出的节目流中提取出视频基本流。然后所提取的视频基本流作为第二视频流V2耦合到第二开关40和,可选地,格式变换器50。
第二开关40根据来自控制器70的控制信号SW2选择性地把第一V1或第二V2基本视频流作为视频流V3耦合到视频解码器45,例如,一个MPEG视频解码器。视频解码器45以熟知的方式对所选视频流V3解码产生结果视频流V4,例如,一个解码后(解压缩后)的视频流。
格式变换器50接收解码后的视频流V4和,可选地,第二基本视频流V2。格式变换器50包括一个显示帧缓存器55和,可选地,一个辅助视频解码器58。格式变换器50根据来自控制器70的控制信号F,工作在直接通过模式、频道转换模式或PIP模式,以产生输出视频流VOUT。输出视频流VOUT耦合到视频驱动电路(未给出)产生显示设备(未给出)上的图象。
在直接通过工作模式中,格式变换器50把解码后的视频流V4作为输出视频流VOUT耦合到视频驱动电路。显示帧缓存器55可被用于存储,举例来说,单一的解码后的一帧。当所存储的解码后的帧被耦合到视频驱动和显示设备上时,将显示所存储帧的一幅静止图象。
在频道转换工作模式中,当与主传输多路分解器35相关联的调谐器/解调器对调谐并解调一个新频道时,格式变换器50利用显示帧缓存器55存储单一视频帧。结果视频输出信号VOUT代表所存储帧的一帧静止图象。该单一视频帧或者是先前频道的最后一帧,或者是新频道的最新的一帧,假如新频道包含在扫描清单150中的话。如果新频道包含在扫描清单中,那么通过可选信号路径V2或开关40和解码器45,作为解码后视频流V4,直接从辅助多路分解和处理单元30中接收到最新帧。频道转换工作模式将在下面根据图3详述。
在PIP工作模式中,格式变换器50,使用可选辅助视频解码器58,至少对第二基本视频流V2的一部分进行解码来产生一个全部解码或部分解码的辅助流。部分解码的辅助流可能包含,举例来说,仅仅是包括在第二基本视频流V2中的I帧内的视频信息。尽管这样一个辅助流在显示时将产生一幅抖动图象(由于典型的ATSC流在每12帧GOP中包含一个I帧),但这对于PIP应用来说也许已经足够了。而且,如果只有I帧需解码,辅助视频解码器58的复杂度就大大降低了。然后为减少视频信息量(即,减少结果图象的尺寸),全部或部分解码辅助流通过如二次采样过程,被重新格式化。然后重新格式化的辅助流与解码后的视频流V4融合产生输出流VOUT。来自融合流的被显示的图象将包含一个与解码后的视频流V4相关的主图象,和一个与重新格式化的辅助流相关的减小尺寸的图象。
在频道扫描工作模式中,辅助多路分解和处理单元30接收系统流SO2,从接收的系统流SO2中多路分解出一个期望的节目流,并从多路分解出的节目传输流中提取出视频基本流。然后对视频基本流进行分析,在视频基本流中识别出一或多个I帧。每当一个I帧被识别,被识别的I帧存储到与特定节目流相关的存储器34中的固定位置。这样,每当一个新的I帧被识别,存储器的固定位置就经常性地被新I帧改写。这个过程一直持续到控制器70触发辅助多路分解和处理单元30从典型地一个新节目传输流中多路分解出新的视频基本流,或者使用合适的调谐器转换物理频道。新的视频流中的I帧以上述方式被识别和存储到与新的节目传输流相关的存储器34内的固定位置。通过,举例来说,检查包含在传输和打包基本流(PES)信息包包头内的包标识(PID),容易发现信息流的变化。频道扫描工作模式将在下面根据图2详述。
在频道转换工作模式中,辅助多路分解和处理单元30从存储器34中取出被存储的与所期望的新的主频道相关的I帧,并耦合到输出端。取出的I帧通过第二开关40耦合到视频解码器45。通过AUX信号,取出的帧被控制器70识别。可选地,取出的I帧可以通过可选路径V2直接耦合到格式变换器50。频道转换工作模式将在下面根据图3详述。
为节省存储器资源,辅助多路分解和处理单元30可选地包括一个调整尺寸和压缩单元32。在存储I帧之前,调整尺寸和压缩单元32调整I帧的尺寸。调整尺寸可以使用Martucci 1996年10月10日在美国提交的申请号为No.08/728459的专利申请(该申请已于1998年12月1日授权,专利号为No.
5845015)中所描述的方法在离散余弦变换(DCT)域内完成,该专利在此完整引入作为参考文件。可选地,可以仅使用低阶DCT系数对帧(或多帧)解码和二次采样,然后重新编码并存入存储器34。采用这种方式,存储器34所需尺寸有利地减小了。而且,在频道扫描或PIP工作模式期间,辅助多路分解和处理单元34使用或控制(即,与之协调工作)视频解码器45或格式变换器50资源所需开销也减少了。
表1给出了一个样本扫描清单150。具体的说,表1中给出的扫描清单150存储了提取12个频道中每一个频道所需的信息。这些信息包括一个频道ID、调谐器参数、解调器参数、节目传输流PID、视频基本流PID和音频基本流PID。
与频道有关的两类信息存储在扫描清单,预定信息和可变信息。与频道有关的预定信息来源于,举例来说,节目存取表(PAT)或节目映射表(PMT)信息。例如,一个特定频道的标定调谐频率和各种传输、视频和音频PID。与频道有关的可变信息是隶属于,例如,信号传输错误、元件的温度漂移和其他错误源所引起的变化信息。例如,与每个调谐器有关的是加到或从一个特定频道的标定调谐频率中减去的频移校正参数。另外,一个调谐器/解调器对中的自适应均衡器(未给出)的系数对不同的频道是不同的。在频道扫描或频道转换过程中,通过利用预定和/或可变频道相关信息来获取新频道,获取该频道所需的实际时间减少了。在频道扫描工作模式中,一个先前扫描过的新的期望频道与调谐器和解调器参数相关,而这些参数可以在一个与新的期望频道相关的先前的I帧耦合到显示设备的同时,直接加载到主调谐器/解调器对上。通过这种方式,本发明有利地提出了一种既减少又掩蔽频道转换延时时间的方法。图1给出了一个可选的参数存储器12。该可选的参数存储器可用于存储扫描清单150中的部分或全部项目。可选的参数存储器12根据来自控制器70的控制信号P,与两个调谐器/解调器对(10A/15A和10B/15B)协作,提取可变频道相关信息。另外,可选的参数存储器12可用于在频道扫描或频道转换过程中,为适当的调谐器/解调器对提供先前获取的可变频道相关信息(即,来自扫描清单150的信息)。
在本实施例中,在扫描清单150中存储了12个频道(当然,在扫描清单150中可以存储更多或更少的频道)。发明者假定这些频道是用户下一步最有可能选择的。在样本实施例扫描清单150中的前四个频道是四个最近刚看过的频道。在表1中它们被识别为最近、最近-1、最近-2、和最近-3。
在本实施例扫描清单150中接下来的四个频道与当前选择的频道有关(即正在观看的频道)。它们被识别为后面、后面+1、前面和前面-1频道。所谓后面频道是指用户在,例如,遥控器上按下频道加一按钮所获取或选择的频道。所谓后面+1频道是指再次执行频道加一命令所得到的频道。同样的,所谓前面频道是指用户在,例如,遥控器上按下频道减一按钮所选择的频道。所谓前面-1频道是指再次执行频道减一命令所得到的频道。
样本实施例扫描清单150中的最后四个频道是四个热门频道。这些频道可能是被用户预先编程的或者是通过,例如,长期观察用户的频道选择习惯随机确定的。例如,控制器70包含存储器76,它可以被用来存储一个与提供给一个特定用户的每一频道相关的计数器。开电源时,控制器70可能检查计数器表,辨别出四个最高的计数值,并存储对应于扫描清单中四个最高计数值的四个频道的信息。
频道ID | 调谐器参数 | 解调器参数 | 传输PID | 视频PID | 音频PID | |
最近 | ||||||
最近-1 | ||||||
最近-2 | ||||||
最近-3 | ||||||
后面 | ||||||
后面+1 | ||||||
前面 | ||||||
前面-1 | ||||||
热门No.1 | ||||||
热门No.2 | ||||||
热门No.3 | ||||||
热门No.4 |
表1
图2给出了根据本发明并适用于使用图1所示ATSC接收机100的频道扫描程序200的流程图。具体的说,频道扫描程序200是控制器70内用于控制接收机100各部分的系统控制程序(未给出)的一部分。频道扫描程序200是作为一个后台或空闲状态程序运行的。就是说,频道扫描程序200只在系统控制程序不工作的时候运行。举例来说,当等待用户命令的时候,系统控制程序可能处于空闲状态。在接收到用户命令后,频道扫描程序200被终止运行而系统控制程序的命令服务部分被激活。频道扫描程序200利用存储在扫描清单150内的信息从扫描清单中被识别的频道中提取出至少一个I帧。表1给出了一个样本扫描清单。
由于使用了开关20,两个调谐器/解调器对(10A/15A,10B/15B)都可以被用作主调谐器/解调器对或辅助调谐器/解调器对。由于一个调谐器/解调器对(即,主调谐器/解调器对)为主传输多路分解器35(即,当前调谐频道)提供当前调谐频道的系统流,控制器70触发开关20把另一个调谐器/解调器对(即,扫描调谐器/解调器对)的输出流耦合到辅助多路分解和处理单元30。
频道扫描程序200在步骤202开始,此时,系统控制程序进入空闲状态。然后频道扫描程序200执行到步骤210,在此,一个索引变量N被初始化为零,一个清单大小变量M被赋值等于扫描清单存储的频道数。在样本实施例中,扫描清单150包含12个频道,如表1所示(即,四个最近频道,四个热门频道和四个与当前所选频道最接近的频道)。索引变量N用于指出和提取扫描清单内关于特定(索引)频道的信息。
频道扫描程序200从步骤210执行到步骤212,在此,索引变量加一。然后程序200执行到步骤214,在此,与当前索引频道相关的调谐器参数和解调器参数从扫描清单150中提取出来。如前面提到的,这些参数也可能存储在可选参数存储器12内。然后程序执行到步骤215,在此,提取出的参数耦合到扫描调谐器/解调器对(10A/15A或10B/15B),随后扫描调谐器/解调器对开始对当前索引频道调谐和解调。
频道扫描程序200从步骤215执行到步骤216,在此,经过一定延时(即,载波恢复、码元恢复等)之后,辅助多路分解和处理单元30对与来自被提取的系统流(SO2)的索引频道相关的节目流进行多路分解和解码。然后程序执行到步骤218,在此,与索引频道相关的基本视频流和可选的音频流,从与索引频道相关的节目传输流中取出。然后程序执行到步骤220,在此,取出的与索引频道相关的基本视频流中出现的第一个I帧被存储到存储器单元34。然后程序执行到步骤222,在此,询问是否索引变量N等于清单大小变量M。如果步骤222的询问得到肯定回答,那么重复执行步骤210到222的程序(即,频道扫描清单从头开始处理)。
上述频道扫描程序200连续地扫描存储在扫描清单150内的频道来为每个频道提取最近的I帧并把取出的I帧存到与该频道相关的存储器34的一部分,籍此构建扫描清单频道的一个I帧索引。以该方式,当一个扫描清单频道被用户选定的时候,被存储的与所选频道相关的I帧可立即耦合到视频解码器45从而在用户的显示屏上迅速生成一幅图象。迅速生成与期望频道相关的图象有利地模仿了类似于现在消费者使用的NTSC电视接收机的快速(即,低时延)频道获取能力。
图3给出了根据本发明并适用于图1所示ATSC接收机的频道转换程序300的流程图。具体的说,频道转换程序300是控制器70内用于控制接收机100各部分的系统控制程序(未给出)的一部分。频道转换程序300响应用户的一个频道转换操作的输入指令。频道转换程序300也导致频道扫描程序200终止。
频道转换程序300在步骤302处开始,此时,一个频道转换操作的用户命令指令被控制器70接收。然后程序300执行到步骤304,在此询问新频道是否在扫描清单内。
如果步骤304的询问得到肯定回答,那么程序300执行到步骤305,在此与新频道相关的调谐器和解调器参数从扫描清单中取出。然后程序300执行到步骤306,在此,取出的调谐器和解调器参数被耦合到主调谐器/解调器对(即,用于产生系统流SO1的调谐器/解调器对)。它触发主调谐器/解调器对开始包含感兴趣频道(即,新频道)的有效系统流的产生过程。然后程序执行到步骤320,在此控制器70触发辅助多路分解和处理单元30从存储器34中提取与期望新频道相关的I帧。然后程序300执行到步骤322,在此,被取出的I帧通过开关40耦合到解码器45。解码器45将解码I帧并把它耦合到格式变换器50,在那里I帧将被存储在显示帧缓存器55。存储在缓存器内的I帧将在显示设备(未给出)上产生一幅静止图象。如果有必要(即,如果取出的I帧经过可选的调整尺寸和压缩单元32处理),格式变换器50将把取出的I帧变换到适合视频驱动器使用和显示的格式。然后程序300执行到步骤324。
如果步骤304的询问得到否定回答,即,所期望的新频道和当前在扫描清单中索引的任何频道都不符,程序300执行到步骤308。在步骤308,在格式变换器50的显示帧缓存器55内出现的帧被用于产生一幅静止图象。(即,当前显示的或先前的频道被简单地冻结在屏幕上。然后程序300执行到步骤324。
在步骤324,控制器70触发主传输多路分解器35分解来自由主调谐器/解调器对(在步骤304确认)产生的系统流SO1的与期望新频道相关的节目传输流。然后程序执行到步骤326,在此与期望新频道相关的基本流从传输节目流中取出。然后程序执行到步骤328,在此与新频道相关的视频基本流通过开关40被耦合到解码器45。然后程序300执行到步骤330,在此,与期望新频道相关的音频基本流被耦合到音频解码器60。
在基本视频流(步骤328)和基本音频流(步骤330)被分别耦合到视频(45)和音频(60)解码器之后,程序300执行到步骤332。在步骤332,扫描清单为反映新频道信息而被更新。具体的说,识别最近、后面和前面频道的频道ID、调谐器频率、节目传输流PID、视频基本流PID和音频基本流PID的信息作如下更新。最近-3信息被丢弃,最近-2信息存储到最近-3的位置,最近-1信息存到最近-2的位置,最近信息存到最近-1的位置,而与旧的或先前调谐的频道相关的信息存储到最近的位置。另外,有关新频道上面递增的两个频道(即后面和后面+1)的信息和有关新频道下面递增的两个频道(即前面和前面-1)的信息被存储到扫描清单150内。
本发明的一个额外特性是PIP交换工作模式。如前面所述,第一开关20根据来自控制器70的控制信号SW1把第一和第二系统流SA、SB中的一个作为第一输出流SO1耦合到第一输出端O1,把第一和第二系统流SA、SB中的一个作为第二输出流SO2耦合到第二输出端O2。在PIP工作模式中,耦合到第一输出端O1的系统流被主传输多路分解器35和相关电路用于产生在显示设备上生成主图象的视频信号V4。类似地,耦合到第二输出端O2的系统流被辅助多路分解和处理单元30和相关电路用于产生生成辅助(即,PIP)图象的视频信号V2。在PIP交换工作模式中,第一开关20,根据来自控制器70的控制信号SW1,交换耦合到输出端O1和O2的系统流。就是说,在进入PIP交换模式之前耦合到输出端O1的系统流在进入PIP交换模式时耦合到输出端O2。类似地,在进入PIP交换模式之前耦合到输出端O2的系统流在进入PIP交换模式时耦合到输出端O1。屏幕上的效果是主图象和PIP图象的交换。PIP交换操作是非常快的,因为被第一开关20交换的系统流已经有效了(即,没有调谐或解调时延)。
本发明的一个附加特性是有产生扫描频道的“马赛克”或平铺小方块图象的能力。具体的说,辅助多路分解和处理单元30利用可选的调整尺寸和压缩单元32压缩每一I帧,使得被压缩的I帧在显示的时候只占用,举例来说,图象的1/12大小。以这种方式,扫描清单150中的所有12个频道可以呈多PIP或平铺的小方块图象的方式同时显示出来。小方块图象可以在每次个别被存储的I帧被更新的时候得到更新:这样的一幅平铺的小方块图象可以容纳四、九、十二、十六或其他合适的图象数。可以使用熟知的屏幕选择方法选择一个特定的小方块图象放大成全尺寸(即,主图象)图象来观看。
这里虽然详细展示和描述了适宜于本发明讲解的各种实施例,技术娴熟者仍可以设计出很多适宜于这些讲解的其他不同的实施例。
Claims (10)
1、一种用于掩蔽信息流接收机中节目选择时延的方法,所述方法包含以下步骤:
在扫描工作模式中,提取多个被识别的信息流之每个的至少一部分,每个信息流与一个节目相关联;
在所述扫描工作模式中,存储所述多个被识别的信息流之每个所述被提取的部分;
在节目选择工作模式中,将期望信息流的识别标识与所述多个被识别的信息流的识别标识进行比较;
在所述标识的合适的比较情况下:
初始化一个信息流选择过程,所述选择过程产生所述期望信息流;
提取信息流中被存储的部分,其中该被存储的部分与所述期望信息流进行合适的比较;
把所述提取的信息流部分耦合到解码器;
把来源于所述信息流选择过程的所述期望信息流耦合到所述解码器。
2、权利要求1的方法,在所述标识的合适的比较情况下,进一步包含如下步骤:
对所述期望信息流的音频部分进行解码,以产生音频信息流,所述音频部分解码步骤在视频部分解码步骤之前;
把所述音频信息流耦合到音频解码器。
3、权利要求1的方法,其中,所述提取被识别的信息流的步骤包含如下步骤:
调谐与所述被识别的信息流相关联的射频载波,以产生中频载波信号;
解调所述中频载波信号,以产生包含所述被识别的信息流的MPEG类系统流;
多路分解所述MPEG类系统流,以提取包含所述被识别的信息流的节目传输流;
从所述节目传输流中提取包含在所述节目传输流内的基本流部分。
4、权利要求1的方法,其中,在所述扫描工作模式中,所述提取步骤包括以下步骤:
从调谐器和解调器至少之一中提取与正在调谐或解调的包含所述信息流的载波信号相关联的参数;以及
存储所述被提取的调谐或解调参数。
5、在接收机中用于快速转换频道的装置,包括:
一个第一频道选择器,用于从多个可用频道中选择第一个频道;
一个解码器,耦合到所述第一频道选择器,用于对与所述第一频道相关联的信息流进行解码,以产生解码的信息流;
一个第二频道选择器,用于选择多个被识别频道中的每一个,所述多个被识别频道中的每一个都至少与一个频道识别标识和一个频道调谐参数相关联;
一个处理器,被耦合到所述第二频道选择器和所述解码器,用于存储和提取每个所述选择频道的信息流的至少一部分;
其中,在频道转换工作模式中:
所述处理器,响应于对期望新频道的频道识别标识与所述多个被识别频道其中之一的频道识别标识所做的合适的比较,把所述一个被识别的频道的所述存储部分耦合到上述解码器;
所述第一频道选择器选择所述期望频道作为所述第一频道;
而且所述解码器开始对所述信息流解码。
6、权利要求5的装置,其中,所述第一和第二频道选择器由各自的第一和第二调谐器/解调器对构成,调谐器/解调器对用于调谐各自的射频载波频率和解调已调制到各自射频载波频率上的各自的信息流,以产生各自的第一和第二系统流。
7、权利要求6的装置,其中,所述被扫描频道的清单包含与每个被列入清单频道相关的调谐器和解调器参数,所述调谐器和解调器参数被耦合到第二调谐器/解调器对。
8、权利要求7的装置,其中,在所述频道转换工作模式中:
所述处理器,响应于对期望新频道的频道识别标识与所述多个被识别频道其中之一的识别标识所做的合适的比较,把与所述多个被识别频道其中之一相关的调谐器和解调器参数耦合到上述第一调谐器/解调器对。
9、权利要求5的装置,其中:
所述处理器包含一个或者工作在频道扫描模式或者工作在画中画模式的画中画处理器;
所述画中画处理器,在画中画工作模式中,只提取一个单一频道的帧内编码部分,并把取出的所述单一频道的帧内编码部分耦合到一个输出端。
10、在接收机中用于频道转换的装置,包括:
一个第一调谐器/解调器对,用于调谐期望的射频载波频率和解调已调制到所述射频载波频率上的信息流,从而产生第一系统流;
一个第二调谐器/解调器对,用于调谐期望的射频载波频率和解调已调制到所述射频载波频率上的信息流,从而产生第二系统流;
一个主多路分解器,选择性地耦合到所述第一和第二调谐器/解调器对其中之一上,用于从所述第一和第二系统流其中之一提取与主频道相关联的视频流并将其耦合到一个输出端;
一个辅助多路分解器,选择性地耦合到所述第一和第二调谐器/解调器对其中之一上,用于从所述第一和第二系统流其中之一重复提取和存储与至少一个辅助频道相关联的视频流部分;
一个视频解码器,选择性地耦合到所述主多路分解器和辅助多路分解器其中之一上,用于解码由所述主多路分解器和辅助多路分解器其中之一产生的视频信息,以产生输出视频流;其中
在频道扫描工作模式中:
所述视频解码器被耦合到主多路分解器;以及
在频道转换工作模式中:
产生与所述主频道相关的所述系统流的所述调谐器/解调器对被调整到产生与期望频道相关的系统流,
所述辅助多路分解器提取,如果可供利用,与所述期望频道相关联的视频流部分并耦合到一个输出端,
在所述主多路分解器开始产生与所述期望频道相关的有效视频信息流之前,所述视频解码器与辅助多路分解器耦合。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6011297P | 1997-09-26 | 1997-09-26 | |
US60/060,112 | 1997-09-26 | ||
US08/978,018 | 1997-11-25 | ||
US08/978,018 US6118498A (en) | 1997-09-26 | 1997-11-25 | Channel scanning and channel change latency reduction in an ATSC television receiver |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1302506A CN1302506A (zh) | 2001-07-04 |
CN1205805C true CN1205805C (zh) | 2005-06-08 |
Family
ID=26739576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB988092905A Expired - Lifetime CN1205805C (zh) | 1997-09-26 | 1998-09-28 | Atsc电视接收机中频道扫描和频道转换的时延的减少 |
Country Status (7)
Country | Link |
---|---|
US (1) | US6118498A (zh) |
EP (1) | EP1025697B1 (zh) |
JP (1) | JP4191379B2 (zh) |
CN (1) | CN1205805C (zh) |
AU (1) | AU9588298A (zh) |
DE (1) | DE69841713D1 (zh) |
WO (1) | WO1999016247A1 (zh) |
Families Citing this family (226)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6603751B1 (en) * | 1998-02-13 | 2003-08-05 | Qualcomm Incorporated | Method and system for performing a handoff in a wireless communication system, such as a hard handoff |
JPH11239305A (ja) * | 1998-02-24 | 1999-08-31 | Sony Corp | デジタルテレビ放送受信装置 |
JP3937564B2 (ja) * | 1998-03-24 | 2007-06-27 | 三菱電機株式会社 | ディジタルビデオ受信装置 |
US7042526B1 (en) | 1998-04-08 | 2006-05-09 | Microsoft Corporation | Worldwide television tuning system with country code based tuning |
US6340997B1 (en) * | 1998-04-08 | 2002-01-22 | Microsoft Corporation | Worldwide television tuning system with object-based tuning control modules |
KR19990085286A (ko) * | 1998-05-15 | 1999-12-06 | 구자홍 | 디지털 티브이의 채널정보변경 방법 |
KR100269159B1 (ko) * | 1998-09-05 | 2000-10-16 | 윤종용 | 튜너 회로 설계 방법 |
GB2343815B (en) * | 1998-11-12 | 2003-10-22 | Sony Uk Ltd | Digital receiver |
US6587446B2 (en) * | 1999-02-11 | 2003-07-01 | Qualcomm Incorporated | Handoff in a wireless communication system |
US7589789B2 (en) * | 1999-05-08 | 2009-09-15 | Lg Electronics Inc. | Video converting device and method for digital TV |
SE520746C2 (sv) * | 1999-05-17 | 2003-08-19 | Omicron Ceti Ab | Anordning för kanalomkoppling i ett digitalt TV- mottagningssystem |
JP2001077671A (ja) * | 1999-07-06 | 2001-03-23 | Matsushita Electric Ind Co Ltd | デジタル放送選局装置およびデジタル放送選局方法 |
US8453181B1 (en) | 1999-07-16 | 2013-05-28 | Thomson Licensing | Method and apparatus for performing a channel search in a television |
EP1073263A1 (en) * | 1999-07-28 | 2001-01-31 | Sarnoff Corporation | Acquiring data from a bitstream |
US8024767B1 (en) * | 1999-09-14 | 2011-09-20 | Ati Technologies Ulc | Method and apparatus for receiving digital video signals |
US6538704B1 (en) * | 1999-10-21 | 2003-03-25 | General Electric Company | NTSC tuner to improve ATSC channel acquisition and reception |
US6459741B1 (en) * | 1999-10-21 | 2002-10-01 | General Electric Company | Implementation of N-VSB training sequences in N-squared QAM receiver structures |
US6721018B1 (en) * | 1999-10-22 | 2004-04-13 | Sony Corporation | Method and apparatus for decreasing the time required to generate a channel map in a television signal receiver |
ATE341805T1 (de) * | 1999-10-28 | 2006-10-15 | Ncube Corp | System mit adaptiver bandbreite und verfahren für datenrundsendung |
US6909726B1 (en) | 1999-10-28 | 2005-06-21 | Broadband Royalty Corporation | Adaptive bandwidth system and method for broadcast data |
US7020217B1 (en) * | 1999-11-04 | 2006-03-28 | Xm Satellite Radio, Inc. | Satellite digital audio radio receiver with instant replay capability |
US6985188B1 (en) * | 1999-11-30 | 2006-01-10 | Thomson Licensing | Video decoding and channel acquisition system |
EP1247399A1 (en) * | 2000-01-14 | 2002-10-09 | Diva Systems Corporation | Conditional access and security for video on-demand systems |
US6714259B2 (en) * | 2000-02-26 | 2004-03-30 | Samsung Electronics Co., Ltd. | Method and apparatus for receiving digital television signals from a plurality of independent channels |
US7113230B1 (en) * | 2000-03-17 | 2006-09-26 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for deriving a channel map for a digital television receiver |
US6519011B1 (en) * | 2000-03-23 | 2003-02-11 | Intel Corporation | Digital television with more than one tuner |
US7934232B1 (en) | 2000-05-04 | 2011-04-26 | Jerding Dean F | Navigation paradigm for access to television services |
US6473137B1 (en) * | 2000-06-28 | 2002-10-29 | Hughes Electronics Corporation | Method and apparatus for audio-visual cues improving perceived acquisition time |
US6804824B1 (en) * | 2000-06-30 | 2004-10-12 | Microsoft Corporation | Systems and methods using multiple tuners |
US6714264B1 (en) * | 2000-08-31 | 2004-03-30 | Matsushita Electric Industrial Co., Ltd. | Digital television channel surfing system |
US7688803B1 (en) | 2000-09-01 | 2010-03-30 | Young Steven J | System and method for coordinating between multiple telephony channels |
JP3631123B2 (ja) * | 2000-10-03 | 2005-03-23 | 三洋電機株式会社 | デジタル放送受信装置 |
US7200859B1 (en) | 2000-11-22 | 2007-04-03 | Digeo, Inc. | Apparatus and method for intelligent multimedia compression and distribution |
GB0029464D0 (en) * | 2000-12-02 | 2001-01-17 | Pace Micro Tech Plc | Predictive tuning on multi-tuner broadcast data receivers |
US6813643B2 (en) * | 2001-01-05 | 2004-11-02 | Digeo, Inc. | Multimedia system with selectable protocol module including MPEG logic and docsis logic sharing a single tuner |
US20020095689A1 (en) * | 2001-01-12 | 2002-07-18 | Novak Robert E. | Hardware decoding of media streams from multiple sources |
DE10104440A1 (de) * | 2001-02-01 | 2002-08-08 | Grundig Ag | Vorrichtung mit mehreren Transportstrompfaden zum Empfang von digitalen Rundfunksignalen |
US20020116705A1 (en) * | 2001-02-20 | 2002-08-22 | Perlman Stephen G. | System and method for processing conditional access data |
US20020114360A1 (en) * | 2001-02-20 | 2002-08-22 | Perlman Stephen G. | System and method for processing multiple broadcast multimedia streams |
KR100363177B1 (ko) * | 2001-03-14 | 2002-12-05 | 삼성전자 주식회사 | 전송 스트림 송수신 장치 |
US7046805B2 (en) * | 2001-03-20 | 2006-05-16 | Digeo, Inc. | System and method for efficiently storing and processing multimedia content |
US7675994B2 (en) * | 2001-04-02 | 2010-03-09 | Koninklijke Philips Electronics N.V. | Packet identification mechanism at the transmitter and receiver for an enhanced ATSC 8-VSB system |
WO2002093299A2 (en) | 2001-05-11 | 2002-11-21 | Scientific-Atlanta, Inc. | Channel buffering and display management system for multi-tuner set-top box |
US7093277B2 (en) * | 2001-05-30 | 2006-08-15 | Digeo, Inc. | System and method for improved multi-stream multimedia transmission and processing |
US7386129B2 (en) * | 2001-05-30 | 2008-06-10 | Digeo, Inc. | System and method for multimedia content simulcast |
US7463737B2 (en) * | 2001-08-15 | 2008-12-09 | Digeo, Inc. | System and method for conditional access key encryption |
US6956623B1 (en) * | 2001-08-27 | 2005-10-18 | At&T Corp. | Method and system for automatically scanning television channels |
US8429688B1 (en) * | 2001-09-19 | 2013-04-23 | At&T Intellectual Property I, L.P. | Broadcast programming guide |
KR100428265B1 (ko) * | 2001-09-27 | 2004-04-28 | 한국전자통신연구원 | 단일 포트를 이용한 다중 데이터 수신 제어 장치 및 방법및 송수신 시스템 |
US7228560B2 (en) * | 2001-10-05 | 2007-06-05 | Microsoft Corporation | Performing server side interactive television |
KR100412107B1 (ko) * | 2001-10-09 | 2003-12-24 | 삼성전자주식회사 | 디지털 방송신호 재생시스템 및 그 재생방법 |
FR2831758B1 (fr) * | 2001-10-30 | 2004-01-23 | Thomson Multimedia Digital Fra | Dispositif de reception de signaux video et procede de commande d'un tel dispositif |
US7962011B2 (en) | 2001-12-06 | 2011-06-14 | Plourde Jr Harold J | Controlling substantially constant buffer capacity for personal video recording with consistent user interface of available disk space |
US8565578B2 (en) | 2001-12-06 | 2013-10-22 | Harold J. Plourde, Jr. | Dividing and managing time-shift buffering into program specific segments based on defined durations |
US6971121B2 (en) | 2001-12-06 | 2005-11-29 | Scientific-Atlanta, Inc. | Composite buffering |
US7257308B2 (en) * | 2001-12-06 | 2007-08-14 | Scientific-Atlanta, Inc. | Converting time-shift buffering for personal video recording into permanent recordings |
US20050174352A1 (en) * | 2002-01-23 | 2005-08-11 | Maria Gabrani | Image processing method and system to increase perceived visual output quality in cases of lack of image data |
JP4040316B2 (ja) * | 2002-02-01 | 2008-01-30 | キヤノン株式会社 | 受信装置 |
WO2003071783A1 (en) * | 2002-02-20 | 2003-08-28 | Koninklijke Philips Electronics N.V. | Video information stream distribution unit |
US6927806B2 (en) | 2002-02-21 | 2005-08-09 | Scientific-Atlanta, Inc. | Systems, methods and apparatuses for minimizing subscriber-perceived digital video channel tuning delay |
US20030159143A1 (en) * | 2002-02-21 | 2003-08-21 | Peter Chan | Systems and methods for generating a real-time video program guide through video access of multiple channels |
KR100975967B1 (ko) * | 2002-04-08 | 2010-08-16 | 톰슨 라이센싱 | 채널 변경 지연을 감소시키기 위해 데이터 캐싱하기 위한 장치 및 방법, 및 디지털 통신 장치 |
US20030196211A1 (en) * | 2002-04-10 | 2003-10-16 | Peter Chan | Systems, methods and apparatuses for simulated rapid tuning of digital video channels |
US8843990B1 (en) * | 2002-04-25 | 2014-09-23 | Visible World, Inc. | System and method for optimized channel switching in digital television broadcasting |
JP4000454B2 (ja) * | 2002-05-13 | 2007-10-31 | ソニー株式会社 | 受信装置および受信方法 |
KR20040111670A (ko) * | 2002-05-21 | 2004-12-31 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 조건부 액세스 시스템 |
FR2841080A1 (fr) * | 2002-06-14 | 2003-12-19 | Thomson Licensing Sa | Procede de visualisation video utilisant un decodeur |
US8745689B2 (en) * | 2002-07-01 | 2014-06-03 | J. Carl Cooper | Channel surfing compressed television sign method and television receiver |
FR2842320A1 (fr) * | 2002-07-12 | 2004-01-16 | Thomson Licensing Sa | Dispositif de traitement de donnees multimedia |
US7523482B2 (en) * | 2002-08-13 | 2009-04-21 | Microsoft Corporation | Seamless digital channel changing |
US8397269B2 (en) | 2002-08-13 | 2013-03-12 | Microsoft Corporation | Fast digital channel changing |
US8181205B2 (en) | 2002-09-24 | 2012-05-15 | Russ Samuel H | PVR channel and PVR IPG information |
JP2004120115A (ja) * | 2002-09-24 | 2004-04-15 | Fujitsu Ten Ltd | デジタル放送受信装置 |
US20040160974A1 (en) * | 2003-02-13 | 2004-08-19 | Read Christopher Jensen | Method and system for rapid channel change within a transport stream |
US20040181813A1 (en) * | 2003-02-13 | 2004-09-16 | Takaaki Ota | Methods and systems for rapid channel change within a digital system |
US7447491B2 (en) * | 2003-06-06 | 2008-11-04 | Silicon Laboratories Inc. | Multi-tuner integrated circuit architecture utilizing frequency isolated local oscillators and associated method |
US7603689B2 (en) * | 2003-06-13 | 2009-10-13 | Microsoft Corporation | Fast start-up for digital video streams |
KR101050858B1 (ko) * | 2003-06-16 | 2011-07-20 | 톰슨 라이센싱 | 압축된 비디오의 고속 채널 변경을 가능하게 하기 위한디코딩 방법 및 장치 |
JP3883986B2 (ja) * | 2003-06-17 | 2007-02-21 | 三洋電機株式会社 | デジタルテレビ放送受信機 |
KR100429688B1 (ko) * | 2003-06-21 | 2004-05-03 | 주식회사 휴맥스 | 모자이크 이피지 서비스에서의 오디오 송신 및 수신방법 |
US9807460B2 (en) | 2003-08-11 | 2017-10-31 | Arris Enterprises, Inc. | Optimal provisioning and management of bandwidth in a video-on-demand services architecture |
EP1661391A1 (en) | 2003-08-13 | 2006-05-31 | Thomson Licensing | Pre-processing of descrambling data to reduce channel-change time |
US20050157215A1 (en) * | 2003-09-11 | 2005-07-21 | Echostar Techonologies Corporation | Method and apparatus for detecting an inactive channel selecting resource in a television converter |
US20050063418A1 (en) * | 2003-09-23 | 2005-03-24 | Case Michael L. | Tuner module utilizing device-specific controller |
US7142255B2 (en) * | 2003-10-08 | 2006-11-28 | Silicon Laboratories Inc. | Transport stream and channel selection system for digital video receiver systems and associated method |
US7562375B2 (en) * | 2003-10-10 | 2009-07-14 | Microsoft Corporation | Fast channel change |
US7444419B2 (en) * | 2003-10-10 | 2008-10-28 | Microsoft Corporation | Media stream scheduling for hiccup-free fast-channel-change in the presence of network chokepoints |
US7310807B2 (en) | 2003-10-29 | 2007-12-18 | Sbc Knowledge Ventures, L.P. | System and method for local video distribution |
US20050097620A1 (en) * | 2003-10-30 | 2005-05-05 | Honeywell International Inc. | Architecture for multi-channel video processing |
US20050105005A1 (en) * | 2003-11-19 | 2005-05-19 | Yuh-Shyang Wu | Image transferring device connected to a display |
US20070094706A1 (en) * | 2003-12-15 | 2007-04-26 | Isenser Farre Jose M | Device which is used to route data flows from various mpeg (motion picture expert group) transfer devices towards one or more associated devices |
CN1890962B (zh) | 2003-12-22 | 2010-06-16 | 汤姆森特许公司 | 用于执行可选择频道搜索的方法及装置 |
JP2005210686A (ja) * | 2003-12-26 | 2005-08-04 | Canon Inc | 信号出力方法およびチャンネル選択装置 |
US8161388B2 (en) | 2004-01-21 | 2012-04-17 | Rodriguez Arturo A | Interactive discovery of display device characteristics |
WO2005074290A1 (en) * | 2004-01-29 | 2005-08-11 | Koninklijke Philips Electronics, N.V. | A digital television system with rapid channel surfing |
DE102004006768B4 (de) * | 2004-02-11 | 2006-01-05 | Infineon Technologies Ag | Verfahren zur Vermeidung von Umschaltverzögerungen beim Kanalwechsel in digitalen Fernsehübertragungssystemen |
US7430222B2 (en) | 2004-02-27 | 2008-09-30 | Microsoft Corporation | Media stream splicer |
US8249113B2 (en) * | 2004-03-19 | 2012-08-21 | Broadlogic Network Technologies, Inc. | Method and system for providing faster channel switching in a digital broadcast system |
KR100724856B1 (ko) * | 2004-03-19 | 2007-06-04 | 삼성전자주식회사 | 디지털 멀티미디어 방송 시스템에서 방송 서비스 수신장치 및 방법 |
WO2005112465A1 (en) * | 2004-05-03 | 2005-11-24 | Thomson Research Funding Corporation | Method and apparatus enabling fast channel change for dsl system |
FR2871649B1 (fr) * | 2004-06-10 | 2006-09-22 | Mediasyscom Soc Par Actions Si | Procede de commutation de programmes video numeriques et emetteur pour sa mise en oeuvre |
US20060020995A1 (en) * | 2004-07-20 | 2006-01-26 | Comcast Cable Communications, Llc | Fast channel change in digital media systems |
US20060026662A1 (en) * | 2004-07-28 | 2006-02-02 | Microsoft Corporation | Broadcast metadata format independent of transmission standard |
US20060025093A1 (en) * | 2004-07-28 | 2006-02-02 | Microsoft Corporation | Broadcast metadata plug-in model |
US8904458B2 (en) | 2004-07-29 | 2014-12-02 | At&T Intellectual Property I, L.P. | System and method for pre-caching a first portion of a video file on a set-top box |
US8584257B2 (en) | 2004-08-10 | 2013-11-12 | At&T Intellectual Property I, L.P. | Method and interface for video content acquisition security on a set-top box |
KR100703682B1 (ko) * | 2004-08-27 | 2007-04-05 | 삼성전자주식회사 | 디지털 방송 수신기에서 채널 절환 지연 시간을감소시키는 방법 및 그 방법을 사용하는 디지털 방송 수신기 |
KR100651449B1 (ko) * | 2004-08-27 | 2006-11-29 | 삼성전자주식회사 | 디지털 방송 수신 장치 및 방법 |
WO2006027846A1 (ja) * | 2004-09-10 | 2006-03-16 | Matsushita Electric Industrial Co., Ltd. | ザッピングストリームの生成装置とその方法 |
US7640352B2 (en) * | 2004-09-24 | 2009-12-29 | Microsoft Corporation | Methods and systems for presentation of media obtained from a media stream |
US8837599B2 (en) * | 2004-10-04 | 2014-09-16 | Broadcom Corporation | System, method and apparatus for clean channel change |
US8086261B2 (en) | 2004-10-07 | 2011-12-27 | At&T Intellectual Property I, L.P. | System and method for providing digital network access and digital broadcast services using combined channels on a single physical medium to the customer premises |
CN101077003A (zh) * | 2004-10-15 | 2007-11-21 | 开放电视公司 | 加速信道变换 |
US20070234395A1 (en) * | 2004-10-15 | 2007-10-04 | Vincent Dureau | Speeding up channel change |
WO2006047722A2 (en) * | 2004-10-27 | 2006-05-04 | Eg Technology, Inc. | Decentralized method for generating an mpeg-2 multiprogram transport stream |
KR101076924B1 (ko) * | 2004-11-01 | 2011-10-26 | 엘지전자 주식회사 | 선호 채널 선택 방법 |
CN100361513C (zh) * | 2004-11-12 | 2008-01-09 | 上海乐金广电电子有限公司 | 数字电视机及其多路频道的音频/视频的加扰确认方法 |
WO2006057938A2 (en) * | 2004-11-22 | 2006-06-01 | Thomson Research Funding Corporation | Method and apparatus for channel change in dsl system |
US7716714B2 (en) | 2004-12-01 | 2010-05-11 | At&T Intellectual Property I, L.P. | System and method for recording television content at a set top box |
US8434116B2 (en) | 2004-12-01 | 2013-04-30 | At&T Intellectual Property I, L.P. | Device, system, and method for managing television tuners |
US7474359B2 (en) | 2004-12-06 | 2009-01-06 | At&T Intellectual Properties I, L.P. | System and method of displaying a video stream |
US7477653B2 (en) * | 2004-12-10 | 2009-01-13 | Microsoft Corporation | Accelerated channel change in rate-limited environments |
US7436346B2 (en) | 2005-01-20 | 2008-10-14 | At&T Intellectual Property I, L.P. | System, method and interface for controlling multiple electronic devices of a home entertainment system via a single control device |
US7307574B2 (en) | 2005-02-02 | 2007-12-11 | Sbc Knowledge Ventures, Lp | Remote control, apparatus, system and methods of using the same |
WO2006082567A1 (en) * | 2005-02-03 | 2006-08-10 | Koninklijke Philips Electronics, N.V. | Faster tuning using multiple tuners and networked monitors |
US8214859B2 (en) | 2005-02-14 | 2012-07-03 | At&T Intellectual Property I, L.P. | Automatic switching between high definition and standard definition IP television signals |
KR100598360B1 (ko) * | 2005-02-14 | 2006-07-06 | 엘지전자 주식회사 | 채널 전환시 영상 표시 지연 시간 단축 장치 및 방법 |
JP2006254319A (ja) * | 2005-03-14 | 2006-09-21 | Toshiba Corp | 映像出力装置及び映像出力方法 |
EP1705915A1 (fr) * | 2005-03-22 | 2006-09-27 | Nagravision S.A. | Procédé de gestion de l'accès à des données à accès conditionnel pour un zapping rapide |
US7668914B2 (en) * | 2005-03-28 | 2010-02-23 | Alcatel Lucent | Milestone synchronization in broadcast multimedia streams |
US8054849B2 (en) | 2005-05-27 | 2011-11-08 | At&T Intellectual Property I, L.P. | System and method of managing video content streams |
US20060277577A1 (en) * | 2005-06-07 | 2006-12-07 | Nokia Corporation | Terminal, method and computer program product for performing operations with respect to broadcast content |
US7490341B2 (en) * | 2005-06-07 | 2009-02-10 | Nokia Corporation | System and associated terminal, method and computer program product for directional channel browsing of broadcast content |
US7908627B2 (en) | 2005-06-22 | 2011-03-15 | At&T Intellectual Property I, L.P. | System and method to provide a unified video signal for diverse receiving platforms |
US8893199B2 (en) | 2005-06-22 | 2014-11-18 | At&T Intellectual Property I, L.P. | System and method of managing video content delivery |
US8365218B2 (en) | 2005-06-24 | 2013-01-29 | At&T Intellectual Property I, L.P. | Networked television and method thereof |
US8635659B2 (en) | 2005-06-24 | 2014-01-21 | At&T Intellectual Property I, L.P. | Audio receiver modular card and method thereof |
US8282476B2 (en) | 2005-06-24 | 2012-10-09 | At&T Intellectual Property I, L.P. | Multimedia-based video game distribution |
US8856311B2 (en) | 2005-06-30 | 2014-10-07 | Nokia Corporation | System coordinated WLAN scanning |
KR100557146B1 (ko) * | 2005-07-09 | 2006-03-03 | 삼성전자주식회사 | 디지털 멀티미디어 방송 수신 장치 |
US8190688B2 (en) | 2005-07-11 | 2012-05-29 | At&T Intellectual Property I, Lp | System and method of transmitting photographs from a set top box |
US7532253B1 (en) * | 2005-07-26 | 2009-05-12 | Pixelworks, Inc. | Television channel change picture-in-picture circuit and method |
US7873102B2 (en) | 2005-07-27 | 2011-01-18 | At&T Intellectual Property I, Lp | Video quality testing by encoding aggregated clips |
EP2421257B1 (en) | 2005-08-15 | 2016-04-20 | NDS Limited | Video trick mode system |
BRPI0616615A8 (pt) * | 2005-09-29 | 2018-03-06 | Thomson Res Funding Corporation | método e aparelho para codificação de vídeo com taxa de transferência variável (vbr) restrita |
EP1775953A1 (en) * | 2005-10-14 | 2007-04-18 | Universiteit Gent | Switching between digital video streams using buffering of second digital video stream |
KR100722027B1 (ko) * | 2005-10-28 | 2007-05-25 | 엘지전자 주식회사 | 영상표시기기의 영상 처리장치 및 방법 |
US7742407B2 (en) * | 2005-11-10 | 2010-06-22 | Scientific-Atlanta, Llc | Quality of service management in a switched digital video environment |
US20070107024A1 (en) * | 2005-11-10 | 2007-05-10 | Scientific-Atlanta, Inc. | Atomic channel changes in a switched digital video system |
US8099756B2 (en) * | 2005-11-10 | 2012-01-17 | Versteeg William C | Channel changes between services with differing bandwidth in a switched digital video system |
US20070106782A1 (en) * | 2005-11-10 | 2007-05-10 | Scientific-Atlanta, Inc. | Bandwidth management in each network device in a switched digital video environment |
US7873760B2 (en) * | 2005-11-11 | 2011-01-18 | Versteeg William C | Expedited digital signal decoding |
EP1786208A1 (en) * | 2005-11-14 | 2007-05-16 | Sony Ericsson Mobile Communications AB | Apparatus and method for an improved selection of a media channel |
US8135040B2 (en) | 2005-11-30 | 2012-03-13 | Microsoft Corporation | Accelerated channel change |
US8630306B2 (en) * | 2006-01-09 | 2014-01-14 | At&T Intellectual Property I, L.P. | Fast channel change apparatus and method for IPTV |
US8532459B2 (en) * | 2006-01-27 | 2013-09-10 | Thomson Licensing | Fast channel change in a digital television receiver |
KR100800895B1 (ko) * | 2006-02-06 | 2008-02-04 | 삼성전자주식회사 | 디지털 방송 수신 단말기에서 채널 변경 속도를 향상시키기위한 장치 및 방법 |
KR100965702B1 (ko) * | 2006-02-07 | 2010-06-24 | 삼성전자주식회사 | 디지털멀티미디어 방송 수신 단말의 epg 정보 제공 장치및 방법 |
FR2898236A1 (fr) * | 2006-03-03 | 2007-09-07 | Thomson Licensing Sas | Procede de transmission de flux audiovisuels en anticipant les commandes de l'utilisateurs, recepteur et emetteur pour la mise en oeuvre du procede |
US7813724B2 (en) * | 2006-03-17 | 2010-10-12 | Comverse Ltd. | System and method for multimedia-to-video conversion to enhance real-time mobile video services |
WO2007126195A1 (en) | 2006-04-29 | 2007-11-08 | Lg Electronics Inc. | Digital broadcasting system and method of transmitting/receiving data |
FR2902267A1 (fr) * | 2006-06-09 | 2007-12-14 | Thomson Licensing Sas | Procedes de reception et d'emission de services de television numerique |
WO2007145410A1 (en) * | 2006-06-15 | 2007-12-21 | Lg Electronics Inc. | Digital broadcasting system and method of processing data |
AT503668B1 (de) * | 2006-06-21 | 2007-12-15 | H P R Electronics Gmbh Entwick | Verfahren und vorrichtung zur darstellung von signalen auf einer anzeigevorrichtung |
US20080022320A1 (en) * | 2006-06-30 | 2008-01-24 | Scientific-Atlanta, Inc. | Systems and Methods of Synchronizing Media Streams |
US7899046B2 (en) * | 2006-07-07 | 2011-03-01 | Ver Steeg William C | Determining strategy for multicast and/or unicast transmission to correct forward errors |
US7877660B2 (en) * | 2006-07-07 | 2011-01-25 | Ver Steeg William C | Transmitting additional forward error correction (FEC) upon request |
US7774672B2 (en) | 2006-07-07 | 2010-08-10 | Scientific-Atlanta, Llc | Requesting additional forward error correction |
US7725797B2 (en) | 2006-07-07 | 2010-05-25 | Scientific-Atlanta, Llc | Buffer for storing data and forward error correction (FEC) |
JP2009545236A (ja) * | 2006-07-28 | 2009-12-17 | トムソン リサーチ ファンディング コーポレイション | ディジタル・ビデオの高速チャンネル切り換えの方法及び装置 |
TWI337829B (en) * | 2006-09-01 | 2011-02-21 | Realtek Semiconductor Corp | Channel selection device and channel selection method |
JP5127187B2 (ja) * | 2006-09-06 | 2013-01-23 | 株式会社ソニー・コンピュータエンタテインメント | 復号化装置、放送波再生システム、およびテレビ受像支援方法 |
JP2008092230A (ja) * | 2006-09-29 | 2008-04-17 | Toshiba Corp | 放送受信装置及び放送受信装置のデコード方法 |
US20080092203A1 (en) * | 2006-10-13 | 2008-04-17 | Nokia Corporation | Approach for channel switch time reduction in IPDC over DVB-H |
US7870465B2 (en) * | 2006-10-18 | 2011-01-11 | Versteeg William C | Reducing channel-change time |
KR20080054975A (ko) * | 2006-12-14 | 2008-06-19 | 삼성전자주식회사 | 선국된 방송 및 선국되지 않은 방송채널들의 이전방송들을하나의 방송화면으로 제공하는 방송수신장치 및 방법 |
KR101086423B1 (ko) * | 2007-01-12 | 2011-11-25 | 삼성전자주식회사 | 디지털 텔레비전(tv) 수신기에서의 채널 전환 속도 향상방법 및 그 디지털 tv 수신기 |
EP1954055A3 (de) * | 2007-02-02 | 2010-01-20 | ROBUST Electronics GmbH | Verfahren zum Betrieb eines Rundfunkempfängers und Rundfunkempfänger zur Durchführung des Verfahrens |
TW200836564A (en) * | 2007-02-16 | 2008-09-01 | Mstar Semiconductor Inc | Control circuit of a display with program searching function, and method for controlling the display to receive program information and select program |
US20080244667A1 (en) * | 2007-03-27 | 2008-10-02 | Osborne Jason C | Bandwidth sensitive switched digital video content delivery |
US8370889B2 (en) * | 2007-03-28 | 2013-02-05 | Kanthimathi Gayatri Sukumar | Switched digital video client reverse channel traffic reduction |
US8102474B2 (en) * | 2007-05-08 | 2012-01-24 | Mediatek Inc. | Systems and methods for channel scanning |
WO2008141654A1 (fr) * | 2007-05-20 | 2008-11-27 | Abdelhakim Meftahi | Auto-zapping programme d'un decodeur du a l'identification de l'evenement tv choisi, par utilisation de la technologie dvb et du codage par mpeg |
KR101386882B1 (ko) * | 2007-06-08 | 2014-04-18 | 삼성전자주식회사 | 디지털 방송 채널 정보 표시 방법 및 장치 |
US8421842B2 (en) * | 2007-06-25 | 2013-04-16 | Microsoft Corporation | Hard/soft frame latency reduction |
US8776160B2 (en) * | 2007-07-27 | 2014-07-08 | William C. Versteeg | Systems and methods of differentiated requests for network access |
US8832766B2 (en) * | 2007-07-27 | 2014-09-09 | William C. Versteeg | Systems and methods of differentiated channel change behavior |
US20090044224A1 (en) * | 2007-08-07 | 2009-02-12 | Texas Instruments Incorporated | Dynamic channel switching |
US8091109B2 (en) | 2007-12-18 | 2012-01-03 | At&T Intellectual Property I, Lp | Set-top box-based TV streaming and redirecting |
CN101472110A (zh) * | 2007-12-25 | 2009-07-01 | 深圳Tcl新技术有限公司 | 频道调谐方法与装置 |
GB2469235B (en) * | 2008-01-31 | 2013-04-03 | Ericsson Telefon Ab L M | Method and apparatus for obtaining media over a communications network |
US8302130B2 (en) * | 2008-05-06 | 2012-10-30 | Microsoft Corporation | Digital TV scanning optimization |
US8640227B2 (en) * | 2008-06-23 | 2014-01-28 | EchoStar Technologies, L.L.C. | Apparatus and methods for dynamic pictorial image authentication |
US8752092B2 (en) * | 2008-06-27 | 2014-06-10 | General Instrument Corporation | Method and apparatus for providing low resolution images in a broadcast system |
US7886073B2 (en) * | 2008-08-08 | 2011-02-08 | Cisco Technology, Inc. | Systems and methods of reducing media stream delay |
US8015310B2 (en) * | 2008-08-08 | 2011-09-06 | Cisco Technology, Inc. | Systems and methods of adaptive playout of delayed media streams |
US20100071004A1 (en) * | 2008-09-18 | 2010-03-18 | Eldon Technology Limited | Methods and apparatus for providing multiple channel recall on a television receiver |
US8473979B2 (en) * | 2008-09-30 | 2013-06-25 | Echostar Technologies L.L.C. | Systems and methods for graphical adjustment of an electronic program guide |
US20100083315A1 (en) * | 2008-09-30 | 2010-04-01 | Echostar Technologies Llc | Systems and methods for graphical control of user interface features provided by a television receiver |
US9357262B2 (en) | 2008-09-30 | 2016-05-31 | Echostar Technologies L.L.C. | Systems and methods for graphical control of picture-in-picture windows |
US8763045B2 (en) * | 2008-09-30 | 2014-06-24 | Echostar Technologies L.L.C. | Systems and methods for providing customer service features via a graphical user interface in a television receiver |
US8582957B2 (en) | 2008-09-22 | 2013-11-12 | EchoStar Technologies, L.L.C. | Methods and apparatus for visually displaying recording timer information |
US8937687B2 (en) * | 2008-09-30 | 2015-01-20 | Echostar Technologies L.L.C. | Systems and methods for graphical control of symbol-based features in a television receiver |
US8572651B2 (en) * | 2008-09-22 | 2013-10-29 | EchoStar Technologies, L.L.C. | Methods and apparatus for presenting supplemental information in an electronic programming guide |
US8411210B2 (en) * | 2008-09-30 | 2013-04-02 | Echostar Technologies L.L.C. | Systems and methods for configuration of a remote control device |
US8793735B2 (en) * | 2008-09-30 | 2014-07-29 | EchoStar Technologies, L.L.C. | Methods and apparatus for providing multiple channel recall on a television receiver |
US20100083319A1 (en) * | 2008-09-30 | 2010-04-01 | Echostar Technologies Llc | Methods and apparatus for locating content in an electronic programming guide |
US8397262B2 (en) * | 2008-09-30 | 2013-03-12 | Echostar Technologies L.L.C. | Systems and methods for graphical control of user interface features in a television receiver |
US8098337B2 (en) * | 2008-09-30 | 2012-01-17 | Echostar Technologies L.L.C. | Systems and methods for automatic configuration of a remote control device |
US9100614B2 (en) * | 2008-10-31 | 2015-08-04 | Echostar Technologies L.L.C. | Graphical interface navigation based on image element proximity |
US8964692B2 (en) * | 2008-11-10 | 2015-02-24 | Qualcomm Incorporated | Spectrum sensing of bluetooth using a sequence of energy detection measurements |
TWI387336B (zh) * | 2008-12-05 | 2013-02-21 | Matsushita Electric Tw Co Ltd | Digital television receiving device and digital television signal processing and receiving method |
US8873639B2 (en) * | 2009-01-08 | 2014-10-28 | Ittiam Systems (P) Ltd | System and method for demultiplexing an MPEG-2 transport stream |
US8239739B2 (en) * | 2009-02-03 | 2012-08-07 | Cisco Technology, Inc. | Systems and methods of deferred error recovery |
US9210354B2 (en) * | 2009-12-15 | 2015-12-08 | Electronics And Telecommunications Research Institute | Method and apparatus for reception and transmission |
US9887855B2 (en) * | 2010-01-22 | 2018-02-06 | Alcatel-Lucent Usa, Inc. | Virtual converged cable access platforms for HFC cable networks |
US8739196B2 (en) | 2010-06-15 | 2014-05-27 | Echostar Broadcasting Corporation | Apparatus, systems and methods for pre-tuning a second tuner in anticipation of a channel surfing activity |
WO2012031075A1 (en) * | 2010-09-01 | 2012-03-08 | Magnus Sorlander | Fail-safe switch for media insertion server in a broadcast stream |
US8605225B2 (en) | 2011-03-31 | 2013-12-10 | Saankhya Labs Pvt. Ltd. | System and method to reduce channel acquisition and channel switch timings in communication receivers |
US9015555B2 (en) | 2011-11-18 | 2015-04-21 | Cisco Technology, Inc. | System and method for multicast error recovery using sampled feedback |
JP6031750B2 (ja) * | 2011-11-25 | 2016-11-24 | 株式会社リコー | 表示制御装置、画像表示システム、表示制御方法およびプログラム |
TW201338528A (zh) * | 2012-03-02 | 2013-09-16 | Mstar Semiconductor Inc | 數位電視資料處理方法以及使用此數位電視資料處理方法的數位電視系統 |
CN105898518A (zh) * | 2015-12-28 | 2016-08-24 | 乐视网信息技术(北京)股份有限公司 | 一种视频加载过程中界面显示方法及装置 |
US10599587B2 (en) | 2016-11-29 | 2020-03-24 | The Government Of The United States, As Represented By The Secretary Of The Army | High latency channel and low latency channel |
EP3425920A1 (en) | 2017-07-06 | 2019-01-09 | Vestel Elektronik Sanayi ve Ticaret A.S. | Media receiver for avoiding interruption of image display upon channel switching |
US11190835B2 (en) * | 2020-02-18 | 2021-11-30 | Sony Corporation | Intelligent unload of broadcaster application on channel change |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4164711A (en) * | 1977-10-31 | 1979-08-14 | Rca Corporation | Tuning system including a memory for storing tuning information with user controls arranged to facilitate its programming |
US4621366A (en) * | 1984-02-22 | 1986-11-04 | Universal Data Systems, Inc. | Modem equalizer training using previously stored parameters |
US4706121B1 (en) * | 1985-07-12 | 1993-12-14 | Insight Telecast, Inc. | Tv schedule system and process |
US4748684A (en) * | 1986-06-03 | 1988-05-31 | Information Resources, Inc. | Fast tuning control for a television system |
US4737993A (en) * | 1987-01-21 | 1988-04-12 | Rca Corporation | Cable broadcast TV receiver with automatic channel search responsive to mode change |
JPH04192887A (ja) * | 1990-11-27 | 1992-07-13 | Fujitsu General Ltd | テレビジョン受信機のゴースト除去装置 |
JPH04320174A (ja) * | 1991-04-19 | 1992-11-10 | Sony Corp | 映像信号処理装置 |
US5210611A (en) * | 1991-08-12 | 1993-05-11 | Keen Y. Yee | Automatic tuning radio/TV using filtered seek |
JP3334166B2 (ja) * | 1992-06-30 | 2002-10-15 | ソニー株式会社 | Vtr |
US5621456A (en) * | 1993-06-22 | 1997-04-15 | Apple Computer, Inc. | Methods and apparatus for audio-visual interface for the display of multiple program categories |
US5583560A (en) * | 1993-06-22 | 1996-12-10 | Apple Computer, Inc. | Method and apparatus for audio-visual interface for the selective display of listing information on a display |
JP3371158B2 (ja) * | 1993-07-23 | 2003-01-27 | ソニー株式会社 | 放送受信装置 |
KR960012019B1 (ko) * | 1993-11-18 | 1996-09-09 | 엘지전자 주식회사 | 에이치디티브이(hdtv)의 채널등화기 |
US5477263A (en) * | 1994-05-26 | 1995-12-19 | Bell Atlantic Network Services, Inc. | Method and apparatus for video on demand with fast forward, reverse and channel pause |
US5682325A (en) * | 1994-09-12 | 1997-10-28 | Bell Atlantic Network Services, Inc. | Level 1 gateway for video tone networks |
EP0710033A3 (en) * | 1994-10-28 | 1999-06-09 | Matsushita Electric Industrial Co., Ltd. | MPEG video decoder having a high bandwidth memory |
JP3498866B2 (ja) * | 1994-11-07 | 2004-02-23 | ソニー株式会社 | 画像表示制御装置および方法 |
KR0166935B1 (ko) * | 1994-11-23 | 1999-03-20 | 구자홍 | 엠펙2 트랜스포트 디코더 장치 |
KR970007893B1 (ko) * | 1994-12-31 | 1997-05-17 | 삼정전자 주식회사 | 선호채널 자동설정장치 |
US5699125A (en) * | 1995-03-31 | 1997-12-16 | Matsushita Electric Corporation Of America | Electronic television program guide for a television system having two tuners |
JP3669523B2 (ja) * | 1995-04-08 | 2005-07-06 | ソニー株式会社 | 符号化装置及び方法 |
US5910960A (en) * | 1995-06-07 | 1999-06-08 | Discovision Associates | Signal processing apparatus and method |
JP3836143B2 (ja) * | 1995-07-19 | 2006-10-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 複数のディジタルビデオビットストリームを復号化する方法及び装置及びこのような装置を含む受信装置 |
JP3508796B2 (ja) * | 1995-09-18 | 2004-03-22 | ソニー株式会社 | テレビ受信機における選局及び表示方法 |
GB2306867B (en) * | 1995-10-26 | 1998-06-03 | Bosch Gmbh Robert | Method of optimizing the transmission of signals |
US5886736A (en) * | 1996-10-24 | 1999-03-23 | General Instrument Corporation | Synchronization of a stereoscopic video sequence |
US5933192A (en) * | 1997-06-18 | 1999-08-03 | Hughes Electronics Corporation | Multi-channel digital video transmission receiver with improved channel-changing response |
-
1997
- 1997-11-25 US US08/978,018 patent/US6118498A/en not_active Expired - Lifetime
-
1998
- 1998-09-28 AU AU95882/98A patent/AU9588298A/en not_active Abandoned
- 1998-09-28 EP EP98949588A patent/EP1025697B1/en not_active Expired - Lifetime
- 1998-09-28 JP JP2000513411A patent/JP4191379B2/ja not_active Expired - Lifetime
- 1998-09-28 DE DE69841713T patent/DE69841713D1/de not_active Expired - Lifetime
- 1998-09-28 CN CNB988092905A patent/CN1205805C/zh not_active Expired - Lifetime
- 1998-09-28 WO PCT/US1998/020315 patent/WO1999016247A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
JP2001517904A (ja) | 2001-10-09 |
DE69841713D1 (de) | 2010-07-22 |
JP4191379B2 (ja) | 2008-12-03 |
EP1025697A1 (en) | 2000-08-09 |
WO1999016247A1 (en) | 1999-04-01 |
AU9588298A (en) | 1999-04-12 |
CN1302506A (zh) | 2001-07-04 |
EP1025697A4 (en) | 2004-08-18 |
EP1025697B1 (en) | 2010-06-09 |
US6118498A (en) | 2000-09-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1205805C (zh) | Atsc电视接收机中频道扫描和频道转换的时延的减少 | |
TW417395B (en) | Channel selection methodology in an ATSC/NTSC teleision receiver | |
EP1848212B1 (en) | Digital broadcast receiver and broadcast data display method for simultaneous display of multi-channel visual images | |
CN1231047C (zh) | 数字电视频道冲浪系统 | |
US20040194134A1 (en) | Method and system for rapid channel change providing stored images of current channel programs | |
CN1111319C (zh) | 数字电视接收机的节目选择系统及方法 | |
CN101267516A (zh) | 显示视频图像的方法 | |
CN1956509A (zh) | 数字电视及其控制方法 | |
CN1212009C (zh) | 电视接收机的副画面控制设备及方法 | |
CN1798299A (zh) | 图像显示设备和频道设置方法 | |
EP2216982A1 (en) | Improved television channel switching method and apparatus | |
EP1574051A1 (en) | Television display unit | |
CN1893640A (zh) | 数字广播系统中的信道转换 | |
US20120008053A1 (en) | Method and system for fast channel change between programs utilizing a single decoder to concurrently decode multiple programs | |
US20060092325A1 (en) | Television display unit | |
US7720143B2 (en) | Signal processing apparatus | |
JP3594524B2 (ja) | ディジタル放送受信装置 | |
KR19990032224A (ko) | 위성 방송 수신기의 채널 정보 표시 방법 | |
CN1653805A (zh) | 接收器 | |
US20090064256A1 (en) | Efficient selection of auxiliary broadcast-service data according to a user preference | |
CN1960454A (zh) | 图像显示器的频道编辑装置及其方法 | |
JP2008153740A (ja) | テレビ受像機及び信号切替方法 | |
CN1705369A (zh) | 数字电视的节目信息管理装置及其方法 | |
CN1783966A (zh) | 数字电视机及其频道设定方法 | |
KR19990086624A (ko) | 위성방송 시스템에 있어서 오디오 전용채널 데이터 전송방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: MEDIATEK INC. Free format text: FORMER OWNER: SARNOFF CORP. Effective date: 20060526 |
|
C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20060526 Address after: Taiwan, China Patentee after: MediaTek.Inc Address before: new jersey Patentee before: Sarnoff Corp. |
|
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20050608 |