Patent Abstract:
Speech representing a desired video site or video subject is detected and digitized at a TV remote, and then sent to a TV. The TV or in some embodiments an Internet server communicating with the TV use speech recognition principles to recognize the speech, enter a database using the recognized speech as entering argument, and return a link to an Internet site hosting the desired video. The link can be displayed on the TV for selection thereof by a user to retrieve the video.

Full Description:
FIELD OF THE INVENTION 
     The present invention relates generally to speech recognition for Internet video search and navigation using TV-centric systems. 
     BACKGROUND OF THE INVENTION 
     The present invention recognizes that it can be difficult for a viewer to input textual information into a television using a remote control for various purposes. For example, if a user of an Internet-enabled TV would like to search the Internet for video related to “Subject A” so that the video can be played on the TV, there is no easy way to give the TV this information, unlike a computer which has a keyboard that can be used. A keyboard can be provided with a TV, but as understood herein this is not fully consistent with the relaxed user experience that is typically associated with watching television. 
     As also recognized herein, another option for allowing user input is to use a “soft keyboard” that appears on the screen, and that requires the user to use cursor keys on the remote control to select individual characters of the desired search subject. As also understood herein, however, such a way to input text is tedious. 
     SUMMARY OF THE INVENTION 
     A system includes a TV communicating with the Internet and a remote control device wirelessly communicating with the TV. A microphone is on the remote control device and the remote control device digitizes speech signals representing a desired video site or video subject from the microphone, sending the signals to the TV. A processor implements speech recognition on received speech signals representing a desired video site or video subject to generate recognized speech. This speech recognition is performed in the context of a grammer constructed from information within Internet video sites as well as information in the user&#39;s context of having viewed the TV content i.e. closed captioned text. This recognized speech is an index. A database containing at least one index correlating speech with Internet addresses can be accessed by the processor using the recognized speech to return an Internet address of an Internet site. 
     In one implementation, the processor and database are located at an Internet server. In another implementation, the processor and database are located in the TV. In this latter implementation, the database can include an index derived from closed captioned text received by the TV, EPG (electronic program guide) information, and/or text input by a user, for a predetermined time (e.g., only information received for a most recent predetermined time period) or for a predetermined data amount (e.g., only the most recent “X” amount of information received, wherein “X” is a predetermined data amount.) The database may also include information representing items that are initial, manufacturer-defined grammar. 
     In another aspect, a method for returning an Internet address of an Internet site storing a desired video includes digitizing speech input to a TV remote. The speech is related to the video. The speech is sent to a TV, and at least phonemes in the speech are recognized. Using the phonemes as entering argument, a database is accessed to retrieve the Internet address. 
     In still another aspect, a computer program product has a computer-readable medium that bears means for recognizing digitized speech representing a video and generating recognized speech in response. The speech is initially detected by a TV remote control. The computer program product also has means for accessing a data structure correlating speech representing video to Internet addresses of sites storing the video, and means retrieving, from the data structure, at least one Internet address correlated to a match. 
     The details of the present invention, both as to its structure and operation, can best be understood in reference to the accompanying drawings, in which like reference numerals refer to like parts, and in which: 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram of a first non-limiting embodiment of the present system; 
         FIG. 2  is a flow chart showing a non-limiting logic that can be used by the system of  FIG. 1 ; and 
         FIG. 3  is a flow chart showing an alternate non-limiting logic that can be used. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring initially to  FIG. 1 , a system is shown, generally designated  10 , that includes a wireless hand-held TV remote control device  12  that can control a TV  14  in accordance with remote control principles known in the art. In the non-limiting embodiment shown, among other components such as a remote control keypad, the remote  12  has a microphone  16  for receiving voice commands from a person and a remote control microprocessor  18  for digitizing the signals from the microphone  16 . The signals if desired can be stored in memory  20  such as random access memory (RAM) and can be sent to the TV  14  by a RF or IR transmitter  22  in the remote  12 , for reception of the signals by a receiver  24  in the TV  14 . 
     The TV  14  can also include a TV processor  26  that can access a non-volatile TV memory  28  (NV RAM and/or hard disk drive/optical disk drive), and the TV processor  26  can be operably associated with a TV display  30  such as a flat panel display or cathode ray tube for displaying video thereon. 
     In the embodiment shown, the TV  14  can communicate with an Internet server  32  over a wired or wireless wide area network link  33  or other link in accordance with network principles known in the art. The server  32  includes a speech recognition module  34  which can recognize phonemes/words/phrases in digitized speech. The server  32  also includes a query processor  36  and a Web indexer/crawler  38  that can access the rest of the Internet  40  for purposes to be shortly disclosed to populate a text indices and video site links database  42  that is associated with the Internet server  32 . 
     More specifically, the web crawler/indexer  38  navigates the Internet and generates reference indices that may be used to refer to videos. Non-limiting examples of the sources for words/phonemes in the indices of the database include (1) closed captioned text that appear with videos, (2) digitized voice “soundtracks” that accompany the video, which is analyzed for phonemes and then indexed, (3) descriptive text that appears with the video, and (4) actual image recognition on the video itself. These indices, together with the location (Internet site) of the corresponding videos, are stored in the database  42 . 
     With the above system architecture in mind, attention is drawn to  FIG. 2  to understand one non-limiting method of the present invention. Commencing at block  44 , speech is detected and digitized at the remote  12 . The digitized speech is sent to the TV  14  at block  46  using the remote transmitter  22  and TV receiver  24 , so that the TV processor  26  can relay the digitized speech at block  48  to the server  32  for recognition thereof by the speech recognition module  34 . In accordance with one aspect of the invention, the speech discussed above is the title of a video, subject of a video, or location of a video on the Internet. The speech recognition module  34  can recognize the video subject or video site using methods known in the field of speech recognition, such as, e.g., matching and analyzing phonemes for the digitized speech and contents of the database  42 . 
     As understood herein, speech recognition requires a context (grammar) to be accurate, and this grammar is provided by the information in the database  42 . Accordingly, after speech recognition at block  48 , the logic moves to block  50  to use the recognized phonemes to retrieve matching contents in the database  42 . More specifically, at block  50  the recognized phonemes from block  48  are matched to phonemes/words in the indices of the database  42  and then the corresponding video site links are returned to the TV  14  where they can be displayed on the monitor  30  for selection of a link by the user by means of the remote  12 , in order to retrieve the actual video content from the selected site. It is to be understood that the indices in the database may also be based on video speech “soundtrack” or the phonemes of video speech soundtracks as detected by the remote  12 . 
     The speech recognition may occur using a further limited grammer, where the grammer is based on audio corresponding with video viewed by the user, or metadata corresponding to video viewed by the user.  FIG. 3  shows an alternate logic that can be used and that is wholly contained within the home (TV  14  and remote control  12 ) without resort to accessing the server  32 . At block  52  a limited grammar is maintained in the memory  28  of the television  14 , so that memory and processing requirements to process this grammar are manageable within the confines of typical TV processors and storages. In one implementation, the limited grammar database may if desired include indices derived from the closed captioned text and metadata received by the TV, as well as text that the user might have downloaded from the Internet and other sources (e.g. QAM broadcast, IPTV, etc.) for a limited time or data amount, e.g., for the past “X” bytes or “Y” hours. The grammar may also include items that are input (trained) by the viewer and a limited, initial, manufacturer-defined grammar that is considered relevant to TV content selection that is permanently part of the memory  28 . 
     Moving to block  54 , speech is detected and digitized at the remote  12 . The digitized speech is sent to the TV  14  at block  56  using the remote transmitter  22  and TV receiver  24 , so that the TV processor  26  can execute speech recognition thereof by a speech recognition module accessible to the TV processor  26 . After speech recognition at block  56 , the logic moves to block  58  to use the recognized phonemes to retrieve matching contents in the TV memory  28 , so that the corresponding video site links can be displayed on the monitor  30  for selection of a link by the user by means of the remote  12 , in order to retrieve the actual video content from the selected site. The matching contents in this implementation may be larger sequences of words and phrases within EPG, metadata, and closed captioned text that contain the recognized speech, and may be passed to an Internet search engine to return addresses of web pages with contents that match the recognized speech. This speech recognition may occur entirely within the RC, or TV, or devices connected to the TV, or it different parts of the speech recognition may occur within all such devices. 
     The effect of the method of  FIG. 3  is that the speech recognition will work reliably if the user speaks a phrase that has occurred during the broadcast in the past few hours, or if it has occurred in any web page in the past few days. 
     While the particular SPEECH RECOGNITION FOR INTERNET VIDEO SEARCH AND NAVIGATION is herein shown and described in detail, it is to be understood that the subject matter which is encompassed by the present invention is limited only by the claims.

Technology Classification (CPC): 7